Primary Series Contacts
|Director, Series & Sanctioning
|Executive Director, Events
|Timing & Scoring
|Series Marketing Coordinator
World Racing Group Contacts
|Sr. Manager, Client Services
|Director, Human Resources/Memberships
|General Manager, DIRTVision
A World Racing Group, event is a competitive racing event which is intended to be conducted and officiated in accordance with the rules herein. These rules provide the guideline for all events. The rulebook may be amended from time-to-time and special rules may be published and/or adjusted at any particular event with the participants receiving prior notification. By participating in these events, all participants agree to comply with these rules and regulations. The rules are not intended to express or imply the warranty of safety as a result of publication of, or compliance with the rules and regulations as stated herein. The rules are intended to offer a guideline for the conduct and officiating of an event.
The Supervisory Official shall be empowered to permit any reasonable and/or appropriate amendment from any of the specifications and/or procedures herein or impose any further restrictions that in their opinion does not alter the minimum acceptable requirements. Revisions to the rules are not intended to express or imply the warranty of safety shall not result from any such deviation or restriction of the specifications, rules and/or procedures. Any interpretation of, or deviation from, these rules herein, are left to the discretion of the racing officials and their jurisdiction is final.
Any equipment changes, alterations to existing parts and/or performance enhancing changes to previously approved parts or equipment must be approved in writing prior to introduction into competition.
Supervisory Officials reserve the right to immediately determine the legality and use of any equipment that has not received prior written approval for introduction into competition. It is ultimately the obligation of each participant to ensure their conduct and equipment complies with all of the applicable rules, as they may be amended from time-to-time. The rules are in no way a guarantee against injury and/or death to participants, spectators, officials and/or others.
ANY CAR, TEAM AND/OR DRIVER THAT DOES NOT MEET THESE SPECIFICATIONS AND/OR EQUIPMENT REQUIREMENTS WILL BE SUBJECT TO PENALTIES AS DETERMINED BY THE WORLD OF OUTLAWS CASE CONSTRUCTION LATE MODEL SERIES OFFICIALS
Chapter 1 – World Racing Group General Rules
Click Here to view the World Racing Group General Rules
Chapter 2 – Procedure Rules
Section 1 – Racing Event Procedures
A. Pre-Race Inspections
a. All cars entered and present at any Series event that are intended to compete in the racing event must pass pre-race inspection prior to any on-track activity. Pre-race inspection may take place in a specified area and/or in the regards of space directly at the team’s transporter. Refusal to present vehicle or preventing officials from completing pre-race inspection will result in disqualification from that event and possible penalties and fines.
B. Drivers Meeting(s)
a. All drivers must attend the drivers’ meeting. Drivers in violation of not attending the Drivers’ Meeting could face a fine, loss of driver’s points, owner’s points and/or suspension.
b. The number of cars starting each event and the number of laps for each event may be announced at the drivers’ meeting.
c. Any changes in the basic event night program due to car count, track conditions and/or any other circumstances may be announced at the drivers’ meeting.
C. Inspection Procedures and Legality
a. Officials may at their discretion, impound part(s) and/or component(s), engine and/or any other components and/or the complete car for competitive, and/or research data analysis.
b. World Racing Group is not responsible for any cost incurred as a result of inspection.
c. Officials may at their discretion, inspect any car entered for competition in any racing event at any time.
D. Weighing and Scales
a. All cars will weigh as directed by announcement, radio message, or posted at the designated Scales, per the weight rule, and track layout. All cars must weigh in immediately following their Races as directed. Any detour, redirection, mud puddle meandering, may result in disqualification or penalty
b. The winner must weigh prior to any Winner’s Circle Interview or Presentation.
c. Any detour to the scale, may result in loss of finish position or time. Should any car stop on the way to the Scales and be touched by anyone other than a Race Official, the Driver may be disqualified. Any car not meeting the minimum weight, after the designated event will lose its time, and/or finishing position from that event.
d. The scales used for the event, provided by the series or the track, will be considered the official scales for the event.
e. Scales will be available for any team to verify its car weight as determined by the official scales for that event.
f. The number of cars to be scaled nightly will be announced at the driver’s meeting, on the pit board, and/or instructed via the driver’s one-way radio.
g. At the scales, the car must present themselves directly onto the scales. The figure shown is the official weight for that car.
h. Officials will allow a car to re-scale two times by pulling off the scale and pulling back on. Reading of the final attempt will become the entered weight.
i. If, at the scales, the car fails to meet the minimum weight, the following penalties apply:
i. Qualifying: The car forfeits the earned qualifying and must start last in a heat race.
ii. Heat Race: The car is penalized for that event but remains eligible for the next qualifying race.
iii. Preliminary Mains, LCS, and Feature: Car and Driver will be scored in the last finishing position of the race.
a. Once a racecar has been started or once any race has been started, all work on the racecar must be completed in the designated work area unless informed otherwise. Any participants who do not work on the car in the designated work area are subject to disqualification and/or fine and/or suspension and/or any other action deemed appropriate by Officials and/or World Racing Group Supervisory Officials.
b. On the initial push, during a yellow and/or red flag situation if a car needs more than one (1) ‘push-off’, except for safety reasons, that car will be penalized 2 running positions. A ‘push off’ is considered completed only when the pushed vehicle has started and pulled away from the push vehicle.
c. Drivers and/or team members will not be permitted to tamper with track racing surface. Any participants who tamper with the track racing surface are subject to disqualification and/or fine and/or suspension and/or any other action deemed appropriate by World Racing Group Supervisory Officials.
d. Any driver, crew member, or team associate that enters the racing surface without express approval from an official are subject to disqualification and/or fine and/or suspension and/or any other action deemed appropriate by World Racing Group Supervisory Officials.
e. All drivers should not exit their car unless there are extenuating emergency circumstances. They should shut off the electrical power, remain in their car, and wait for track and/or safety officials without removing any personal safety equipment. At no time should a driver and/or crew member approach any portion of the racing surface or another moving vehicle.
f. If a car/driver switch is made, for any reason, that car/driver must start at the rear of the next segment of the racing program in which that car/driver has qualified for.
F. Entry and Pill Draw
a. All drivers and/or teams entered, in any event, must draw for a position in qualifying order at the designated location. The drivers and/or teams are responsible for their own pill draw. Only one (1) car may be entered per driver in any event.
b. All pills will be drawn prior to the driver’s meeting. If a driver and/or team entered and present at the event does not draw, that team will be placed at the end of the qualifying order. In the event that there is no qualifying, then the driver and/or team will start at the rear of their specified qualifying race.
c. All participants shall be DIRTcar Members in good standing to participate in any event draw.
G. Hot Laps
a. All entered cars will hot lap by the qualifying order. If a driver misses their respective group, they will forfeit their opportunity to hot lap.
b. The Scoring Transponder must be mounted on the racecar prior to hot laps.
c. If and when track packing is required any car that does not participate will be given only one (1) qualifying lap and/or the best the car may qualify is 50% + 1 of the entered cars for that event.
a. Qualifying will consist of two consecutive timed laps unless otherwise noted. Changes to the two-lap qualifying procedure will be at the discretion of series Officials.
b. When conditions and circumstances allow multi-car qualifying may be utilized at the sole discretion of WoO Officials.
c. Qualifying may be split into two or more separate qualifying groups based on car count. Regardless of the situation, a car must qualify within its overall assigned group.
d. Qualifying will take place in the order of the pill draw. Each car and/or team will have a two-car and/or two-group grace period to be in line for their own qualifying opportunity.
e. If the grace period is missed the late car will take its qualifying at the end of the scheduled lineup and receive only one qualifying lap. The best a late car can qualify is 50% (lower number) + 1 of the overall number of qualifiers in a group no matter what the qualifying time of record is posted.
f. Once a car is pushed and/or rolls for time trials, even if it doesn’t start, that is considered an attempt to qualify. If the car leaves the track and goes to the pit area or returns to the qualifying line it will be considered late and will only receive one qualifying lap as outlined above.
g. The cars that are late must be in line before the last scheduled car attempts to qualify. Qualifying will be closed once all cars that are in line have attempted to qualify.
h. In the event of two or more cars posting the same qualifying times, the tiebreaker will be the fastest other lap time of the two consecutive recorded laps. If this does not break the tie, the tie will be broken by the qualifying pill draw. In the event that one (1) lap qualifying is utilized, the tiebreaker will be the qualifying pill draw.
i. In the event of inclement weather and/or unforeseen circumstances, it is at the discretion of the World Racing Group Supervisory Officials to revise the qualifying procedure.
j. If for any reason, a race must be run on a different day after qualifying is completed (except for multiple-day events), the driver may start the race in the earned qualifying position even if not in the car originally presented for qualifying.
I. Heat Races
a. The heat race lineups will be determined by the results of qualifying.
b. The number of laps in the heat races and the number of cars transferring from the heat race(s) will be announced at the driver’s meeting by Series Officials.
c. There may be a redraw for starting position amongst the top finisher(s) in each heat race. The number of drivers that participate in the redraw will be determined by the number of heat race(s) run during any given event night and will be announced at the driver’s meeting.
d. Any driver transferring from the heat race(s) to the feature race that does not qualify for the redraw will line up for the feature race based upon the driver’s finish in the heat race.
e. Any driver that does not transfer from the heat race(s) to the feature race will be assigned to compete in an LCS and/or preliminary main.
J. Last Chance Showdown(s)
a. The Last Chance Showdown(s) lineup will be determined by the finishing order of the heat race(s).
b. The number of laps and number of transfer position(s) from the Last Chance Showdown will be based on the overall car count for the event and announced at the driver’s meeting.
K. Backup Cars
a. A backup car may be introduced at any time between qualifying and the start of the Feature due to the original car not operating properly and/or from extensive damage. Such determination will be at the sole discretion of the Series Officials. Any such change will result in the driver starting at the rear of the next race segment for which the driver has qualified for. If a driver changes car(s) after hot laps, that driver will remain in his drawn position for qualifying and will be positioned in subsequent races accordingly.
b. If a backup car is introduced, the car must pass pre-race technical inspection prior to any competition. A backup car may be obtained from any source and does not have to be part of a team’s original equipment.
c. An additional entry/inspection fee may be due for the introduction of any backup car where applicable.
d. Once a car has been withdrawn from an event, that car will not be allowed to be resubmitted to competition during that event.
L. Dash Exemptions
a. Any car or driver that either crashes or is injured during the Dash to the extent that either is not able to start the Feature will be awarded last place in the Feature finishing order. Alternates will not be added to the field.
a. The race will begin immediately once the racing surface is clear and the cars are properly aligned in their assigned starting positions.
b. Any driver, team, and/or car, who purposely attempts to hold up the start of any race will be placed at the rear of the lineup and could be disqualified from the event, suspended, and/or fined at the discretion of the World Racing Group Officials.
c. Once the allotted time (announced at the driver’s meeting) allowed for being on the track or in the push-off and/or staging area, ready to race, has expired, any late car will be penalized to the rear of the field. Sprint Car push off will be two (2) positions.
d. Any car pushed or joining the field after the field has started assembling must start at the rear of the field.
e. In any race once the one (1) to go signal has been displayed cars will not be allowed to enter the racing surface unless directed by a Series Official.
f. All starts and restarts will take place at a consistent speed. Consistent speed will be at the discretion of World Racing Group Officials. Starts will take place within a designated area that will be identified at the driver’s meeting. Any car out of line and/or passing before this point will bring out a caution period and will be penalized two (2) positions on the ensuing restart. If an offending car is located on the last row of the starting grid then that car is allowed to restart but will be penalized 2 positions from its finishing position. If the same car commits a second offense it shall be disqualified from that event. All front row cars must choose their racing line coming out of turn three (3) and must maintain that line until the start or restart occurs. Failure to do so will result in a two (2) position penalty. Failure to acknowledge and comply with the “move back” signal may result in being parked for that race.
g. In the event that the race is not properly started by the two (2) front row cars, the responsible car(s) may be moved to the second row. Failure to acknowledge and comply with the “move back” signal may result in being parked for that race.
h. Alternate starters for any race will not be permitted to start any race after the original start has taken place.
i. One (1) complete lap must be completed before the race is restarted using a restart lineup.
j. The pole car sets the pace and the front row starts the race together at the designated area, regardless of a displayed flag. Any passing before the front row accelerates will not be permitted.
k. If a caution comes out on the original start or before one (1) lap is completed, the car or cars that brought out the caution will lineup at the rear of the field and the race will have a complete restart for the remainder of the field with cars lined up by position at the discretion of the race director.
a. All restarts will take place with the lead lap cars moved to the front of the field. Lapped cars will pull to the inside and fall in behind the last car on the lead lap in their order of running.
b. If a car is unable to properly restart the race after the one (1) attempt, the car will be penalized two (2) positions.
c. When an infraction occurs on a restart, World of Outlaws Officials may exercise their discretion and allow the race to continue, not calling for another restart, and then penalize the offending car(s) under yellow flag conditions or at the conclusion of the race. The offending car(s) will be penalized two (2) positions plus any positions gained.
d. The restart area will be at the designated restart area, which will be announced at the Driver’s Meeting.
e. All restarts will take place at a consistent speed. Consistent speed will be at the discretion of Series Officials.
f. Any cars that stop in the pit/designated work area, during a caution period will be required to restart from the rear of the field.
g. Any cars that are involved in a red flag situation will be required to restart at the rear of the field, including cars that go to the pits during a red flag situation.
h. Under red flag conditions any car that stops because of a blocked track, at the discretion of the Series Officials, will not be considered involved in the red.
i. Any car that is stopped for consultation during a caution period will retain its position only if the Series Officials deem the car ‘clear’ and permit it to return directly to competition without adjustment.
j. If a car is not in a proper nose-to-tail alignment and/or is laying back to create an excessive gap between cars, then that car may be penalized. If there are multiple violations, the car may be disqualified from the event.
k. Double-File Restarts: Under yellow-flag conditions, the field initially goes to a single-file grid. Once the running order has been established and the field is set the race leader will choose either the inside or outside lane. The field will then be signaled to realign double-file. All cars positioned to line up behind the leader will go to the lane the leader has chosen and those positioned to line up behind the 2nd place car will go to the 2nd place car’s lane. The grid must remain double-file and nose-to-tail until the race is started in the designated start area. The race leader sets the pace and is the control car. The race leader restarts the race. Once the leader starts the race it is started for the entire field. Passing and maneuvering throughout the field is allowed as soon as the race has started. World of Outlaw Sprint Car Series and/or World Racing Group Officials reserve the right to change and/or alter this rule, provided the competitors are given notice (in advance and/or over the one-way radio) due to any circumstances that require such a change and/or alteration.
l. Restarts will follow single-file procedures (i.e.: cone on front stretch) following a caution period and/or red flag period during the final ten (10) laps of any racing event over 20 laps and single file during the final five (5) laps of any racing event under 20-laps.
m. Single-File Restarts: A restart cone will be placed on the front straightaway. Cars will assemble in a single file running order.
n. All cars must pass to the right of the restart cone(s) in a single file, nose-to-tail manner.
o. If a car passes to the left of the restart cone, hits the cone, passes another car before reaching the cone, is not in a proper nose-to-tail alignment, and/or laying back to create an excessive gap between cars, then that car will be penalized two positions. Any car in the last 2 running positions of the restart that commits an offense will be allowed to restart but will be penalized 2 finishing positions. If there are multiple violations, the car may be disqualified from the event.
a. Any car that does not race on the designated racing surface in order to better its position will be black flagged and penalized at the discretion of the Series Officials.
b. The maximum number of event laps will be stated by the Series Race Director during the driver’s meeting but may change due to extenuating circumstances.
c. Any car that spins, is involved in an incident, and/or has a problem but does not bring out the yellow flag and/or create a caution period, will blend back into the field where the driver is able to do so. If there is an inadvertent caution period, the Series Officials will determine the placement of the car(s) involved. The placement of the car will be where the car blended back into the field.
d. At the discretion of the Series Official, any car that is involved in two (2) or more unaided spins may be penalized.
e. All races must be completed in a “green-white-checker” finish. This means if the yellow flag is displayed or caution lights illuminated prior to the leader receiving the checkered flag, that race will be restarted and run for two consecutive laps before completion. Under certain conditions, at the discretion of Series Officials, a one-lap “white – checkered” finish is allowable.
f. If a race is red-flagged due to weather conditions and cars are sent to the pits, then any and all work, including tire changes, is permitted.
g. If there is an incident resulting in a closed red situation and the determination is made to go to an open red then all the cars that were considered involved, whether they went to the work area or not, will re-align at the rear of the field in their scored position on their last completed lap. Order is lead lap cars, 1 lap down cars, and multiple lap down cars
h. A spin or stoppage that requires a car to be restarted during a yellow flag slow down period is considered as being involved and will result in said car or cars re-aligning at the rear of the field along with other cars that were involved in the yellow stoppage.
i. If it is determined in any race, after the original start, that any competitor deliberately initiates a caution period, by any means, that competitor may be penalized. The determination of what constitutes deliberately initiating a caution period will be at the judgment of the and/or World Racing Group Officials.
j. Any cars going to the work area and re-entering the race together will be positioned in the order of their last scored lap at the rear of the field behind cars that are on the same lap as they are. If a restart green flag is displayed and followed by a yellow or red flag before a lap is scored, then any car(s) that remained in the work area can re-enter the race but will be positioned behind any same lap car that took the aforementioned restart green flag. If a car remains in the work area it can re-enter during any ensuing race stoppage, lining up behind any cars that are on the same lap as said car that is re-entering.
k. Officials may complete an event, at any completed lap count, at their discretion, if a condition or circumstances create a reasonable inability to continue. The race will be considered complete unless announced otherwise.
l. If, when officials determine in their sole discretion that unforeseen circumstances prevent the completion of the advertised distance or make it impractical to continue or complete the race within a reasonable time after it has been stopped, the race will be considered officially completed as of the last lap scored by the leader prior to the race halt. The finishing positions will be determined, as they would have held if the race had been restarted.
m. A pace car may be utilized to pace the field prior to the start of the event and on all restarts. Passing of the pace car, unless otherwise instructed to do so by the Series Race Director will not be permitted.
n. Hand signals, colored gloves and colored sticks will be permitted during the use of communication with drivers. Flashlights, anything with electricity and/or two-way radio communication or any electronic communication with drivers will not be permitted.
o. Any driver not qualified for the Feature that gains entry into the Feature due to a car/driver separation will earn show-up points only for the entire event.
p. In the event that a race car is inadvertently or purposely hit by a push truck, pace vehicle or purposely hit by another race car during push-off, or under yellow flag conditions or other non-racing activity and such incident is witnessed by a World of Outlaws Official, then repairs can be made to the contacted vehicle and that car will resume it’s running position. The maximum time period allotted for such repairs is six (6) minutes. If repairs cannot be completed within this time period, then the car will be scored as finishing last in that race. Alternate(s) starters will not be given a starting position in this situation. In the event the damaged car is not able to reenter the race, the car will be scored last on the lap in which that car has completed.
q. When a car is presented in the designated lineup area or during push-off for any event competition, any tire change is prohibited. Any tire change will result in forfeiting starting position. Penalty will be starting in the last position.
r. Adding fuel, whether on the track or in the work area, will not be permitted when yellow flag and/or closed red flag conditions exist.
P. Work Area
a. When the yellow flag is displayed a two (2) minute period will be permitted for the repairs of any race damage. The time will begin once the car has reached the designated work area. The car will rejoin the field at the tail of the lap it’s on once the work has been completed at the direction of Series Officials. After the completion of halfway of the race, the two-minute period will no longer be in effect.
Q. Flag Rules and Officials Signals
a. Green Flag
i. The green flag signifies the start of any race and/or qualifying run.
b. Yellow Flag
i. When the yellow flag is displayed, and/or the yellow caution lights are illuminated, this signifies a caution period.
ii. When the yellow flag is displayed and/or caution lights illuminated no passing is permitted unless instructed to do so by Series Officials.
c. Red Flag
i. All red flags are considered closed red flags unless Series Officials determines it needs to be an open red. In an open red flag, a work area may be designated on the racing surface. All cars will be moved to the designated work area on the racing surface before work begins.
ii. When the red flag is displayed all cars on the racing surface and in the pit areas must come to a complete stop in a controlled manner, while not stopping and/or driving through the area of the incident. Cars are not permitted to move for any reason unless instructed by Series Officials. Any car that moves during the red flag without permission will be penalized and/or parked.
iii. During any red flag situation all drivers, unless involved in the incident must remain in their car unless otherwise instructed by Series Officials.
iv. During any red flag, once the field is stopped, the race director may offer the opportunity for any car to the work area by signaling to do so with instruction over the one-way radio. Any car that goes to the work area for service during the red flag period will surrender its running position and have to restart at the rear of the field and/or if the race is canceled due to inclement weather, the car will be scored behind those cars which did not go to the work area.
v. If the race is red-flagged due to inclement weather conditions, work and tire changes will be permitted.
vi. CLOSED RED: The track will be closed. Crew members will not be permitted on the race track and/or to their race cars.
vii. OPEN RED: The Race Director will determine when the track is open. Any repairs and/or adjustments, except changing a tire or wheel, can be made to the race car. When the Race Director determines that the racing may resume; an air horn designating the start of a 2-minute work period will be sounded. At one-minute remaining, the air horn will be sounded twice. At the end of the 2-minute period, the horn will be sounded, officially ending the work period. Crews must be clear of their car when the 2-minute period has expired or be penalized 2 running positions. Last row cars violating this procedure will be penalized 2 positions from their finishing position. Any car still being worked on once the field has started assembling will be disqualified and not allowed to re-enter the race.
viii. FUEL RED: As soon as all the crews have reached their cars an air horn designating a 2-minute work period will be sounded. The 2-minute work period procedure is the same as outlined above. Any repairs and adjustments, except changing a tire or wheel, can be made to the race car as long as they are completed before the 2-minute period has expired.
d. Black Flag
i. If the black flag is displayed, then the driver that the flag is being displayed toward must bring their car to designated pit work area immediately for consultation. The car will not be scored from the point that the black flag has been displayed. If after the car is inspected and it is able to return to competition, the car may only return to the track during a caution and/or red flag period.
e. White Flag
i. When the white flag is displayed this signifies that the leader of the race and/or the car that is qualifying has started the last lap of that event.
f. Checkered Flag
i. The checkered flag signifies the completion of the event. All cars must pass underneath the checkered flag to be scored correctly on the final lap of the event.
ii. Once the leader has crossed under the checkered flag, that race will be considered complete.
g. Officials Signals
i. All drivers must obey signals, communications, blackboard(s), and/or any other Official’s communications that assist in the direction and facilitation of creating proper lineups and/or the process of completing the event.
R. General Racing Equipment, Driver Radios, and Scoring Transponders
a. All competitors in all series are required to have, in working condition, an approved one-way radio system to aid in lineups and/or the use of race control to manage the racing event.
b. All cars must have and/or provide adequate hardware for the attachment of the Scoring Transponder.
c. All cars are required to be equipped with a scoring transponder securely mounted on the specified location. It is the competitor’s responsibility to ensure proper installation and working condition of the scoring transponder.
d. If a car is found to have a non-functioning scoring transponder, they will be directed to the pits to have one installed. A penalty may be assessed at the discretion of series officials.
Section 2 – Scoring Procedures
A. All races are scored at the designated start/finish line.
B. A lap will not be scored on the original start and/or any restart unless all cars complete the lap by passing through the start/finish line except for the cars involved in the incident.
C. After the first completed green flag lap, following the original start or restart, when the caution is displayed all cars that were scored under green flag conditions will hold that scored position with all other cars lining up according to their last completed green flag scored lap. This partial lap will count toward the event’s total number of laps. Racing back to the start/finish line will not be permitted. This is also known as split scoring. A completed lap is considered leader plus one (1).
Section 3 – Payoff Procedure
A. All paid purses, appearance money and/or other awards and/or funds as outlined in the promoter’s contract shall be paid to the car owner and/or designated owner’s representative.
Section 4 – Provisional and Alternate Starting Positions
A. Provisional starting positions may not be awarded at the discretion of the Series Director for the following, but not limited to; if a car is deemed not be able to run a competitive speed; if a car is late to present itself for the feature event.
B. Once a driver has refused and/or chose not to use their awarded provisional, they will have forfeited their right to use said provisional for that night and it will be awarded to the next eligible driver with no exceptions.
C. All Teams wanting to take a provisional must have attempted to compete in at least one preliminary event leading up to the Feature.
D. Provisional starters tag the rear of the Feature.
E. If provisionals are permitted in the Feature event; the car(s) owner(s) and driver(s) will earn full SDS points.
F. Multi-car teams cannot rotate drivers to enhance their provisional position.
G. Any Team using a non-paid provisional shall forfeit the minimum start money paid for the Feature. Any position attained that pays greater than the start money will be paid as advertised minus the start money amount.
H. All Teams wanting to take a provisional must have attempted to compete in at least one preliminary event leading up to the Feature.
I. Provisionals tag the rear of the Feature.
J. An maximum of four (4) platinum/gold awarded provisionals will be permitted for each event’s Feature.
K. Tracks may install a provisional program, for up to 2 local drivers.
L. In the event a driver for the Feature Event is unable to take the initial green flag, the /driver will receive show-up points and purse for last place. Any reason for not being able to take the initial green must be approved by Series Officials. In the event that multiple cars/drivers cannot make the initial green, they will be scored and pointed at the back of the field based on starting position. Alternates will no longer be taken to the Feature Event.
Section 5 – Racing Program and Special Show Events
A. There may be special event shows during the year that do not follow the Series racing formats. When such events occur, all teams will be informed of specific program and/or procedural changes for that particular event. All racing programs are subject to change and any such changes will be explained to all competitors prior to the race.
B. From time-to-time mandatory appearances, interviews and or/autograph sessions will be scheduled. Drivers will be notified of attendance and location at selected events. If any driver fails to report to any autograph session a written penalty may be issued, which could result in loss of points, starting positions earned and/or fine(s).
Section 6 – Points Breakdown
A. The overall fastest qualifier will earn five (5) points.
B. The top five (5) finishers in each heat race will earn finishing points. 1st place will earn 5 points, 2nd place will earn 4 points, 3rd place will earn 3 points, 4th place will earn 2 points, and 5th place will earn 1 point.
C. 90 (show-up) points will be awarded to all members in good standing, who attempt to qualify a car, but fails to qualify for the feature event.
D. If a race is cancelled and rescheduled and a member in good standing is unable to return due to extenuating circumstances, then that member may be awarded show-up points if they were present and prepared to race on the original date.
E. Points will be awarded special events, as agreed with members in good standing, utilizing show-up points only.
F. In the event of a tie that occurs during the season, the driver that placed highest in the most recently completed event will be listed ahead in the overall Championship Point Standings. The order is created by wins, top 5s, top 10s, last completed event.
G. In the event that a tie should occur in the final Championship Point Standings at the end of the season, the tie will be broken using the following tiebreakers in order; Most feature wins, most second place finishes, most third place finishes, etc. until the tie is broken. In the event that the tie remains unbroken by finishes the tiebreaker will result to qualifying results in the same manner.
Chapter 3 – Technical Rules
Section 1 – Engines
A. General and Location
a. Conventional stock type V-8 engines (OEM American long block – GM, Ford and Chrysler) with the cam in the block will be permitted. Aftermarket DART and Merlin cast iron engine blocks will be permitted.
b. A maximum displacement of 480 cubic inches will be permitted with a minimum displacement of 396 cubic inches
c. Aluminum engine blocks will not be permitted.
d. No titanium anywhere in the engine unless specifically stated in the 2023 rulebook.
e. Reverse rotation engines will not be permitted.
f. The engine must be centered between the frame rails in the front of the chassis and placed in an upright position.
g. Engine set back will be as follows; Minimum is 56”-inches and a Maximum of 66”-inches with a tolerance of 1⁄2”-inch (+/-). The setback will be measured from the centerline of the front axle to the rear-machined surface of the engine where the motor plate is attached to the motor.
h. In the event that there are new engine components and/or a new engine configuration, they must be submitted to World Racing Group Officials and approved prior to being introduced into competition. Only World Racing Group Officials will be able to approve new engine and previously unapproved engine components.
B. DIRTcar 500
a. All 500 engines allowed prior to 2016 must be inspected and approved for competition by DIRTcar technical department.
a. All engines must be normally aspirated with a single conventional-type four (4) barrel carburetor utilizing Holley float bowls, center section and components. The metering blocks and the base plate may be billet and altered.
b. A maximum of four (4) venturis will be permitted.
c. Fuel injection, nitrous oxide injection, turbo chargers and/or superchargers will not be permitted.
d. Fuel and/or air must enter the carburetor through the standard air path / venturi as is typical in a stock OEM carburetor.
e. In-line venturis will not be permitted.
f. A minimum of two (2) throttle return springs and a metal toe loop mounted on the gas pedal will be required. The throttle return springs must be mounted in separate locations.
g. Boosters may be safety wired
h. A WRG approved carburetor roll over plate that prevents fuel spillage in case of a roll over is highly recommended.
i. Carburetors with plate(s) will be mandated at a future date to be announced. b. Currently approved roll over plate approved as followed,
1. Willy’s Carb & Dyno shop LLC. Part # WCD4000SB
2. Willy’s Carb & Dyno shop LLC. Part # WCD4002
D. Intake Manifold
a. Any single piece American production cast intake manifold that permits the mounting of only one four (4) barrel carburetor will be permitted.
b. Only cast aluminum and/or cast-iron intake manifolds will be permitted.
c. Porting of the intake manifold will be permitted.
E. Cylinder Heads
a. Any design cylinder head (must be approved by SDS Officials) manufactured from cast aluminum or cast iron will be permitted. The minimum angle valve angle for any Chevrolet and/or GM type cylinder head will be 18 degrees. Ford and/or Chrysler cylinder head(s) must be approved by DIRTcar and/or Super DIRTcar and/or World Racing Group Officials prior to being utilized in competition.
b. Porting will be permitted.
c. Valves must remain in a traditional type pattern but may be any size.
d. Only two (2) valves per cylinder will be permitted.
e. Only one (1) spark plug per cylinder will be permitted.
f. Titanium valves and retainers will be permitted.
g. Hollow stem valves and/or liquid cooled valves will not be permitted.
h. The engine must have an operating self-starting mechanism. Vehicles that require a ‘push start’ will not be permitted.
a. Any design camshaft will be permitted, provided the camshaft remains in a stock location in the engine block.
b. Chain or belt drives will be permitted.
c. Overhead cams and/or similar type applications will not be permitted.
G. Pistons, Connecting Rods, and Crankshaft
a. Only aluminum pistons will be permitted.
b. Only steel or cast-iron crank shafts will be permitted.
c. Any design, length and/or make of magnetic steel connecting rods will be permitted.
d. Titanium crankshafts and/or connecting rods will not be permitted.
a. Any type of mechanically driven ignition located in the stock position will be permitted.
b. An optional crank trigger ignition will be permitted.
c. Engine timing must be controlled by crank trigger or distributor. Switching from one ignition system to another will not be permitted. Ignition leads must be connected directly to the ignition box and all leads must have a clear and direct path to their connections.
d. Only one (1) ignition coil and one (1) ignition amplified box will be permitted in the system and on the car.
e. Magnetos will be permitted.
f. Ignition boxes must remain as manufactured. Internal or external alterations to the ignition amplifier box will not be permitted.
g. From time-to-time ignition boxes may be impounded for inspection and/or exchanged and/or analyzed by the ignition amplifier box manufacturer.
h. All ignition wiring must remain as designed by the manufacturer and in an exposed manner for ease of inspection.
i. One American Passenger Car sized battery with a maximum of 16 volts will be permitted. The voltage must not measure more than 16.8 volts anywhere in the system. Step up transformer and/or any other device designed to increase voltage will not be permitted.
j. The battery must be securely mounted inside the frame rails.
k. All cars must have an ignition switch, which is easily accessible by the driver and/or safety crew and
clearly labeled ON/OFF in the driver’s compartment. Motor must not run when in the off position.
l. A battery shut-off switch is mandatory. The switch must be clearly labeled ON/OFF. The switch must be mounted on the left side inner panel (above the steering post). The switch must be outside the panel and easily accessed externally. The switch must be wired to shut off the hot (pos +) side and must not run when in the off position. See diagram in the back of this rule book.
I. Lubrication, Oiling System, Oil Cooler
a. Only a conventional type wet or dry-type oil pump will be permitted. Internal or external pumps will be permitted. Multi-stage dry sump oil pumps driven by a standard belt drive will be permitted.
b. One oil tank and one oil cooler will be permitted within the oiling system.
c. Only magnetic steel or aluminum oil pans will be permitted.
d. Air-type and/or vacuum-type pumps for the purpose of removing air from the oil pan and/or system will not be permitted.
e. The oil pan on conventional DIRTcar Big Block and the DIRTcar 500 engines must have a one (1”) inch diameter inspection hole on the left side to permit inspection. If no inspection hole is present the oil pan must be removed for inspection.
f. The oil tank and the oil cooler may be mounted outside the frame rails.
g. The maximum capacity of the oil tank must be 14 US quarts.
h. The oil tank and the oil cooler must be fully enclosed by the body and must be securely mounted and positively fastened to the frame. Reference the drawing in the back of this rule book for the minimum oil cooler specifications.
i. Excessive bracing and/or mounting material will not be permitted.
j. Oil coolers mounted outside the external body work will not be permitted.
k. Oil coolers must be mounted under the hood or under the side wings/pods. Oil coolers mounted behind the driver exposed will not be permitted. Oil coolers that are not under the hood must have ducting covering them and remain below the bodywork. Unless mounted under the hood the oil cooler must be mounted horizontal and flush with the cut out in the side wing/pod area.
J. Transmission, Driveline, and Driveline Components
a. Only approved North American and/or Canadian manufactured manual shift transmissions will be permitted. Automatic and/or automatic-type transmissions will not be permitted.
b. Overdrive and/or under-drive transmissions will not be permitted.
c. Running through reduction gears will not be permitted. The transmission must be direct drive to the rear end.
d. The transmission must have working gears. Forward, neutral and reverse must be working. From the neutral position and with the motor running, the car must be able to go forward and/or a backward in a smooth manner. The car must start and move under its own power.
e. The transmission must bolt to the bell housing.
f. Driveline components made of carbon fiber, titanium and/or other materials (considered exotic) will not be permitted.
g. A maximum of two (2) universal joints per driveline will be permitted. No CV Joints allowed.
a. Only one (1) drive shaft connected from the transmission to the center section of the rear end will be permitted.
b. Two (2) driveshaft hoops / closed rings a minimum 1⁄4”-inch thick x 2”-inch wide magnetic steel must be positively fastened by two (2) 3/8”-inch grade 5 bolts to the left and right torque arms.
c. The drive shaft must have some type of drive shaft cover/shield. Cars with open drive shafts must have a drive shaft tunnel a minimum of 1/8”-inch thick by 6” wide magnetic steel extending from 2”-inches under the front edge of the seat and up the back of the seat 4” covering the transmission, drive shaft and the
universal joint(s) and output flange on top and both sides. The tunnel must extend down to the floorboards. The cover must be positively fastened with a minimum of four (4) 3/8”-inch diameter bolts at the bottom
connected to a cross-member. The cover must be a solid unit with no cuts and/or holes and/or removed material for the purpose of weight reduction. The only hole may be for the gear shift control.
d. Carbon fiber, titanium, and/or other materials (considered exotic) will not be permitted anywhere in the car.
L. Engine Cooling System and Radiator
a. Only one (1) radiator will be permitted. The minimum width of the radiator will be 20”-inches when measured from the outside edge(s) of the radiator. The radiator must be mounted vertically in front of the engine. The minimum height of the radiator must be 22”-inches when measured from the bottom of the frame rail vertically and may incorporate the oil cooler to achieve the vertical height. Radiators mounted on an angle will not be permitted. Plastic and/or carbon fiber radiators will not be permitted.
b. Plastic and/or carbon fiber radiators will not be permitted.
c. Auxiliary cooling tanks and/or overflow cans and/or canisters will not be permitted in the cockpit.
d. The cooling fan for the radiator must be mounted in the stock OEM location on the front of the water pump. Fans mounted to the crankshaft will not be permitted. Electric fans and/or water pumps will not be permitted. No flex style fans allowed.
M. Rear End
a. Only Quick-Change type rear ends will be permitted.
b. Hypoid-type and/or Nine (9”) Ford-type and/or limited slip-type and/or lockers and/or two speed rear ends will not be permitted. Non-Quick-Change Rear Ends not permitted
c. Only aluminum and/or magnetic steel spools will be permitted.
d. Only steel and/or aluminum rear spindles will be permitted. No camber rear-ends allowed. If the rear spindle is machined from aluminum, it must be a one-piece tube and spindle with a minimum outside diameter 2-7/8” and a maximum 2-1/2” inside diameter.
e. Live rear ends with aluminum tubes will not be permitted. All others must be approved.
f. Carbon fiber, titanium and/or other materials (considered exotic) for any rear end component will not be permitted. Tungsten or any other exotic metal are not permitted, in any form.
g. A maximum rear end offset of 4”-inches from the center of the inside tire width when measured from the inside of the left rear tire to the inside of the right rear tire at axle height. Refer to the drawing at the back of this rule book.
h. Aluminum rear end tubes only, with a maximum wall thickness of .410”. Outer diameter cannot exceed 3”.
i. Outer collars (other than to attach bridge cage) are not permitted. Droop chain bracket may be steel, excessively thick or enlarged brackets of any type are not permitted. All other brackets must be aluminum unless authorized by DIRTCar.
j. Drive Axles must not exceed 1.600” diameter and must be made of steel only. No tungsten. Inserts to be slid inside of tubes, made of any material, are not permitted.
k. Ballast inside, attached to, or machined into hubs are not permitted. Maximum hub 10 lbs.
Section 2 – Fuel, Fuel Cells, and Fuel Systems
A. Fuel, Fuel Cells, and Fuel Systems
a. Either meets FT3 or SFI 28.3 requirements and/or Include: a metal container, bladder, foam, top bolted fuel valve plate with flop valve or roll over check valve OEM cap. The fuel cell must have a maximum capacity of 24 US gallons and must remain in a rectangle and/or square shape for measuring and calculating capacity. The fuel cell must be mounted securely in its container and centered between the frame rails. Pressure tanks on fuel systems will not be permitted. Auxiliary fuel tanks will not be permitted. No dry ice or any other cooling agents will be allowed on the motor during competition. Fuel coolers of any type will not be permitted. A clearly marked fuel shut off valve, labeled On and Off, must be mounted within reach of the driver. It must be labeled with the word(s) “Fuel Shut Off”. Refer to the drawing in the drawing section of this rule book.
b. Only ‘D’-type VP Racing Gasoline, the official fuel of DIRTcar will be permitted for competition. VP D- 113 or D-12 will be the only specified fuel permitted at any sanctioned DIRTcar and/or Super DIRTcar Series event. Blending of fuels, including VP spec (including ‘D’) fuels of different octane will not be permitted. Alcohol, methanol, nitrous oxide, nitro-methane and/or propylene oxide will not be permitted. Fuel may be subject to inspection and testing at any time. Proof of purchase for the official fuel of DIRTcar may be required.
c. The maximum capacity of the fuel when measured empty and/or dry will be measured in cubic inches utilizing the standard formula of length (minus 1⁄2”-inch) x width (minus 1⁄2”-inch) x depth (minus 1⁄2”-inch) will be 5,660 cubic inches.
d. The foam in the fuel cell must remain unaltered. A minimal cut in the foam will be permitted in the shape of a square or a rectangle. The cut may be no more than 1,000 square inches. The foam must retain the factory cut.
e. The fuel cell must be enclosed completely in a rectangle and/or square container that is a minimum thickness of 20-gauge magnetic steel. An aluminum container may be used as an option and must be a minimum of .060”-inch in thickness. On the bottom of the fuel cell, a piece of .090-guage material (aluminum and/or magnetic steel – in addition to the existing container) must be used at the bottom of the fuel cell container to prevent bowing and/or deflection. The .090-guage material must have an inspection hole drilled near the center of the piece to measure the thickness of the material. A 1”-inch x 1”-inch x .0625”-inch thick magnetic steel square tubing rack must be fabricated on the top, front and rear sides of the fuel cell container. The square tubing must be a minimum of 5”-inches from the outside edge of the fuel cell on either side. The rack may be fastened to the bottom of the fuel cell can utilizing a piece of magnetic steel angle material that is a minimum of 1”-inch x 1”-inch with a minimum material thickness of .065”-inch magnetic angle steel that is on all four (4) sides of the container/Or the fuel cell must be mounted with a minimum of two (2) .125-inch thick steel straps a minimum of 1” (inch) wide. The straps must cover the entire cell. Fuel cells that are mounted in a square tubing frame will be permitted. A minimum of 5/6”-inch ASTN Grade 8 bolts must be used to mount the fuel cell to the frame. Drilling multiple holes and/or any attempt to lighten any piece within the fuel cell container and/or rack will not be permitted. The measurements taken in regard to the fuel cell container will be measured on an inside-to- inside basis. A tolerance for material thickness will be calculated and permitted for dimensions; however, there will be no tolerance for expansion and/or containers that are larger than the minimum.
f. Only one (1) fuel filter with a maximum capacity of one (1) US quart will be permitted with one (1) carburetor fuel log with a maximum outside diameter of 1-1/2”-inches. The fuel log must remain straight without bends and/or curves and must be a maximum of 16”-inches in length Plastic and/or glass fuel filters will not be permitted.
g. Fuel coolers of any type will not be permitted. No dry ice or any other cooling agents will be allowed on the motor during competition.
h. The fuel cell must be mounted behind the driver rear axle between the rear tires, a minimum of 4”-inches ahead of the rear bumper.
i. The bottom of the fuel cell container must be a minimum of 12”-inches from the ground.
j. The fuel pick up must be positioned on the top of the fuel cell and be constructed of metal. The vent line must have a check valve.
k. For the purpose of inspection, the driver and/or crew must be prepared to drain fuel upon request for inspection and/or measurement.
l. Only mechanical and/or belt driven fuel pumps will be permitted. Fuel injection system(s) and/or electrical fuel pumps and/or any type of pressurized fuel system will not be permitted.
m. For the Official Fuel of DIRTcar, the fuel provider’s decals must be displayed on both sides of all DIRTcar racecars and a patch is required on the driver’s uniform. Logos and/or the presentation of any other fuel manufacturer and/or fuel refinery on the racecar and/or driver’s uniform will not be permitted.
B. Fuel, Fuel Cells, and Fuel Systems for Live Pit Stop Events
a. For all events that require a fuel stop the quick fill connect must be located in the upper corner of the left rear quarter panel. The maximum filler spout size is 4-1/4 inches outside diameter by eight (8) inches long, then tapering over the next 8-1/2 inches to 3 inches diameter extending to an overall length of 18 inches. The filler tube must take a straight and direct route to the fuel cell from the quick fill connect. Quick fill tubes constructed of aluminum a maximum 3 inches in diameter will be permitted. A minimum of six (6) inches of 3 inch maximum inside diameter flex hose must be used between the end of the filler spout and fuel cell neck. Only one fuel filler tube is permitted with a maximum outside diameter of 3”- inches. When a quick fill device is utilized there must be a vent line with a maximum inside diameter of 1-1/4”-inches. The fuel vent line must take a straight and direct route from the fuel cell to the quarter panel and must be able to accept a catch-can with a one-way check valve. The one-way check valve must be a standard manufactured product available to everyone. If check valve is not listed in a catalog with a part number and price it is not legal. The fuel vent line must positively fasten to the left rear corner of the rear panel.
b. A 1”-inch x 1”-inch x .0625”-inch thick magnetic steel square tubing rack must be fabricated on the top, front and rear sides of the fuel cell container. The square tubing must be a minimum of 5”-inches from
the outside edge of the fuel cell on either side. The rack may be fastened to the bottom of the fuel cell can utilizing a piece of magnetic steel angle material that is a minimum of 1”-inch x 1”-inch with a minimum material thickness of .065”-inch magnetic angle steel that is on all four (4) sides of the container.
c. The catch-can man may not stand behind the rear bumper of the car during pit stop refueling.
d. Any fuel lines quick fill and/or fuel vent lines must not be visible from behind the car and must be contained and covered within the rear panel which must be symmetrical in size and shape.
e. Optional rear fuel cell opening) All fuel lines quick fill and/or fuel vent lines must be contained and covered within the rear panel which must be symmetrical in size and shape. The fuel tank sides must be completely enclosed on each side from the front to the rear of the fuel cell and from the bottom of the cell to the rear panel. No holes and/or openings permitted in the side panels except for quick fill and/or fuel vent line openings. The rear area of the fuel cell from the rear panel which covers the quick fill line and/or fuel vent lines to the bottom of the cell may remain open. For this option fuel lines may or may not be visible where they attach to the fuel cell fill plate.
Section 3 – Exhaust, Muffler, and Sound Reduction Devices
A. Each car must have one (1) unaltered spec muffler per exhaust. No other muffler or sound reduction will be permitted.
B. The intermediate pipe between the collector and the muffler must have a maximum OD 3 1⁄2 inches. The tail pipe must have a maximum OD of 4 inches.
C. The exhaust must exit past the driver and the exhaust must flow toward the rear of the car in an upward manner away from the racing surface. Exhaust systems that face the outside of the car will not be permitted.
D. Each muffler must have a tail pipe that is a minimum of 10”-inches long when measured off the rear edge of the muffler. Complete exhaust system must be welded or bolted, band clamps may be added over welded joints.
E. Cross-over and/or the joining of exhaust systems from side-to-side will not be permitted.
F. Any manufacturer of exhaust header is permitted, but the header material must be magnetic steel and/or
stainless steel. No header wrap allowed anywhere in the exhaust system.
G. The permitted mufflers include: Dynomax part number: 17224, 17539 and 17628; Extreme Muffler part number(s): 31530, 31535, 31230, 31235, 30830 or 30835; Beyea part number(s): MUF3DL and MUF3.5DL. Henry’s DMMS3, DMMS3.5, DMMS4.
H. Several tracks have a locally enforced decibel rule, which preempt any particular muffler rule. Some tracks may have a maximum sound level rule of 95 decibels at 100 feet. This rule will be enforced by local government agencies. Such decibel rules preempt utilizing the required mufflers in sub-section 17.3.
Section 4 – Traction Control Devices
A. All electronic and/or computerized wheel spin and/or ignition retardation and/or acceleration limiting and/or traction control devices of any type will not be permitted.
B. Adjustable ping control devices, dial a chip controls, timing controls and/or automated throttle controls will not be permitted.
C. Adjustable restrictor plates will not be permitted.
D. Remote control components of any-type will not be permitted.
E. Radios and/or devices for transmitting voice and/or data will not be permitted, unless otherwise authorized prior to any event.
F. Data acquisition systems will not be permitted.
Section 5 – Chassis and Frame
A. Chassis and Frame
a. All frames must be fabricated utilizing 2”x4” rectangular magnetic steel tubing with a .120” wall thickness. Only 2”x 4” rectangular box frames between the front and rear axle centers will be permitted. The 4”-inch side of the rectangular tubing must remain in the vertical position No open holes or drilling holes in frame rails will be permitted, Round tubing must be either 1-1/2” outside diameter (if used for main hoop must be .125”) and/or 1-3/4” outside diameter with wall thickness of .095”-inches.
b. Frame width will be as follows; At the front shock towers a minimum 24” and a maximum of 35”-inches. Rear of the car is a minimum of 26” with a maximum of 35”-inches. The minimum frame width at the rear roll bar must be 26”-inches. All measurements will be taken from the outside of the frame rails, at the top and bottom of the frame rails and its longest length. Clips, sub-frames, etc., will be considered a part of the frame.
c. The minimum length of the 2”x4” frame rails begins 14”-inches in front of the centerline of the rear axle and extends to the front of the radiator. The left and right rails (both top and bottom) must be equal in distance from the driveline centerline along the total length of the frame. Offset frame rails will not be permitted. A maximum 4”-inch indent in the lower left rear frame rail for suspension clearance will be permitted. The two (2) upper frame rails in the engine compartment may be altered for engine clearance only.
d. The kick-ups must meet the same specifications as the roll cage and/or frame material.
e. Titanium and/or carbon fiber material(s) will not be permitted on the chassis and/or frame.
f. There must be a minimum of 2-1/2”-inches ground clearance from the chassis at its lowest point.
g. Ground effects will not be permitted.
B. Seat Location and Mounting in Frame
a. The seat and steering wheel must be centered in the frame. Offset mounting of the seat and/or steering wheel will not be permitted.
b. The bottom rear of the seat must be a maximum of 16”-inches from the centerline of the rear axle. Refer to the drawing at the back of this rule book.
Section 6 – Weight
A. All cars will be weighed with the driver seated in the car. The minimum weight permitted before and/or after an on track event will be measured by the track scales. The track scales will be the official scales. All cars found to be light prior to any event, time permitting will be allowed to make the necessary adjustments and represent themselves at the scales. The number of cars to be weighed after an event will be announced at the driver’s meeting and/or on the one-way radio. If a car is signaled to go to the scales in any fashion and does not report to the scales at the appropriate time, that car may be disqualified from the event. Any car that is found to be light following time trials and/or a qualifying event will be disqualified from that particular race and may make the necessary adjustments and represent themselves for that car’s assigned consolation event. If a car is found to be light after the feature event, that car will be disqualified from the event.
a. All Big Block Modifieds utilizing a Big Block engine per this rule book must maintain a minimum weight of 2,500 lbs. following the completion of any event.
b. All Big Block Modifieds utilizing a DIRTcar 500 Big Block engine per this rule book must maintain a minimum weight of 2,500 lbs. following the completion of any event.
c. All Modifieds utilizing a DIRTcar 358 Modified engine with the Brodix “Spec” heads, ported intake and “tri-y” exhaust must maintain a minimum weight of 2,500 lbs. following the completion of any event unless otherwise posted
d. All Modifieds utilizing a Brodix “Spec.” DIRTcar 358 Modified engine with the stock intake manifold and spec. Schoenfeld headers and a steel or aluminum oil pan must maintain a minimum weight of 2,400 lbs. following the completion of any event unless otherwise posted.
e. The W16 must maintain a minimum weight of 2350 lbs. after the completion of any event unless otherwise posted.
B. During any Super DIRTcar Series Modified event all DIRTcar legal 358 modifieds will be permitted to race at weights posted before the event via the Competitors Notes. (Note, weights could vary depending on track).
a. For weekly racing events combining the DIRTcar 358 division and DIRTcar Big Block Modifieds the track may establish a weight rule to balance the DIRTcar 358 classes and DIRTcar Big Block Modifieds in competition. Super DIRTcar Series and/or DIRTcar Officials must be notified and grant permission for such a rule.
b. Any small block (short block in length) running with the Big Block Modifieds may only have a maximum engine displacement as specified by the DIRTcar 358 engine rules and the car must follow all DIRTcar 358 Modified rules.
c. All weights and/or ballast must be positively fastened and mounted within the vertical planes formed by the frame rails and must remain stationary during competition. All weight(s) must have a minimum of two (2) 1⁄2”-inch diameter grade 5 bolts and/or studs passing completely through the weight. Bolts
and/or studs must be anchored with a minimum of two weight clamps to the frame. Bolts and/or studs welded to the frame will not be permitted.
d. All weights must be painted white and clearly labeled with the car number on it. Lead may be used for ballast, pellets or liquid type weight ballast will not be permitted. All materials must be approved.
C. Ballast and/or weight may not be mounted to the roll cage above the rear deck.
D. All added weight(s) must be securely attached to the frame below the body decking.
E. Frame is defined as the steel welded structure only.
F. Any part that moves or is not a fixed component to the steel frame structure may not be used for any weight attachment.
G. Weights attached to the rear bumper and/or outside the frame in any way will not be permitted.
Section 7 – Body
BODY STYLE AND DIMENSIONS
ALL MEASUREMENTS WILL BE TAKEN WITH DRIVER AND/ OR WITH OR WITH OUT FUEL. TOLERANCE PERMITTED ON ALL BODY DIMENSIONS IS MAXIMUM OF +/- (PLUS OR MINUS) 1⁄2”-INCH (ONE-HALF INCH). THIS IS A TOLERANCE, NOT A DIMENSION THAT IS INTENDED TO BE ADDED TO THE BODY DIMENSIONS.
A. General Body
a. Mirrors and/or reflective devices will not be permitted.
b. Super DIRTcar and/or DIRTcar Series Officials reserve the right to request body and/or sheet metal to be replaced and/or painted if it has any sharp edges and/or does not appear presentable. Presentable is at the discretion of the Series Official.
c. The maximum rear spoiler height, regardless of ride height, may not exceed 50”-inches. The rear spoiler must be able to provide the driver following a view of the track ahead.
d. A full magnetic steel windscreen and/or rock guard is required. The windscreen and/or rock guard must have an individual hope opening of 2” x 1” with a minimum of 1/16” thickness. Chicken wire type and/or aluminum screens will not be permitted. The windscreen and/or rock guard must cover the entire windshield area across the front of the roll cage and from the top of the roll cage down to the base of the cowl and/or hood. In addition, clear lexan-type and/or safety glass windshields will be permitted. If the lexan and/or safety glass is utilized it must be shatterproof and mounted behind the windscreen and/or rock guard. Any additional windshield must not obstruct the driver’s exit of the vehicle. Recommended is 3 upright, quarter inch bars behind the screen for added strength.
e. Offset bodies will not be permitted, all body panels must symmetrical unless noted in the rule book.
B. Body Material
a. Only magnetic steel and/or aluminum will be permitted for all inner and outer body panels.
b. Vertical material (plastic and/or rubber-type), with a material thickness between .090”-to-.125”-inch and a minimum height of 8”-inches from the bottom of the quarter panel will be permitted, provided both doors and/or quarter panels maintain the same length and height with or without the plastic (symmetrical). An overlap of two (2”) inches to secure the door(s) extensions will be permitted. The door(s) must maintain a minimum of six (6”) inches of ground clearance including the additional material extending below the metal body. The overall dimensions of the door(s) and extensions must meet the specifications.
c. Only a single piece fiberglass roof will be permitted.
d. Only fiberglass and/or aluminum hood, hood scoop, windshield cowl, rear interior tire clearance cover will be permitted
e. Only clear lexan will be permitted for the rear spoiler and rear wing windows. Decals and/or lettering will not be permitted on the rear spoiler and/or rear wing windows.
a. A one-piece fiberglass roof, single ply, one contour inside and out will be permitted. Carbon fiber and/or any other composite type materials will not be permitted. All roll bars must remain exposed. Vertical material of any type used to mount the roof that may cover the roll bar will not be permitted. The roof must weigh a minimum of 10 lbs.
b. The roof must be centered from side-to-side on the roll cage and on the frame. Offset bodies will not be permitted. The leading edge of the roof must be positively fastened in a stationary position a minimum of 33”-inches and a maximum of 48”-inches in front of the rear axle centerline. The roof must be securely and positively fastened on all sides.
c. The minimum length of the roof is 47”-inches with a maximum of 60”-inches. The minimum width of the roof is 48”-inches with a maximum of 52”-inches. The roof must be of the turtleback style and shape with a minimum of 3⁄4”-inch belly from front-to-rear and 3⁄4”-inch from side-to-side. The roof -contour must fit the DIRTcar roof template patterns. The maximum front lip must be 1⁄2”-inch. The maximum side edge(s) must be 1-1/8”-inch break. Refer to drawings.
d. Changes to the shape and/or location of the roof at any time during competition will not be permitted.
e. The maximum overall height of the car is 62”-inches with a minimum of 53”-inches measured from the ground.
f. The maximum roof angle is 6 degrees when measured with the DIRTcar gauge. (See reference drawing).
g. Any proposed roof design that deviates from the preceding rules must be submitted to DIRTcar for approval and approved before being presented for competition.
D. Front Door Posts
a. Only a one (1) piece magnetic steel and/or aluminum front door posts and/or ‘A’-pillars a minimum of .050”-inches with a maximum of .090”-inches will be permitted. The front door posts must be securely mounted to the roof and to the door(s). The side of the front door post must measure a minimum and maximum of 2”-inches. The front door post may be bead rolled and/or have a lip and/or flange for re- enforcement, but the re-enforcement must not exceed a maximum 3/8”-inch in width.
b. The door post may be fastened with a minimum of two (2) 3/16”-inch bolts to the door bracket for ease of fabrication. The Door post must not extend past the vertical plane of the door.
c. Additional material, air directional devices, lexan vent windows and/or excessive material will not be permitted in the corner of the front door post, where the post meets the door panel.
d. There will be no tolerance on the front door post measurements.
E. Rear Wing Windows, Side View, and Rear View
a. All rear wing panels and windows must resemble a current production OEM style body. Only manufacture approved rear wing panels and windows will be permitted for competition. Any non-manufacture rear wing panel must resemble and/or meet the criteria as the submitted rear wing panels and/or windows. Any rear wing panel that is submitted for competition must not exceed 815 square-inches in total area. All rear wing panels must be submitted for approval prior to introduction into competition.
b. The upper profile must not extend above a straight line projected from the rear of the roof to a point 3”- inches higher than the rear deck. A minimum 2”-inch indent in the profile, so as not to make the panel a fast back is mandatory. (Please refer to the drawing and photographs)
c. The maximum base length will be 61”-inches. The left and right must be of the same style and dimensions (symmetrical). (See example of Body Style Drawing)
d. All rear wing(s) must have an opera-type window. The window must be lexan. Bends or breaks in the Lexan area of the window will not be permitted.
e. Only one break as a change in body line/contour will be permitted in the rear window panel.
f. Decals and/or lettering will not be permitted on the rear windows.
g. The rear view of the wing window must go in a straight line from the top of the quarter panel (tangent) or body line to the roof with a maximum gradual bow of 2”-inches in the center of the wing window.
h. Flanges and or additional material added to the rear window panel for the purpose of directing air flow will not be permitted.
F. Body Width and Ground Clearance
a. The body width, when measured at any point along the body line from front-to-back will be a maximum of 68”-inches and a minimum of 64”-inches.
b. A minimum chassis ground clearance of 2 1⁄2”-inches will be permitted.
c. Fan and/or ground-effect cars will not be permitted.
d. Rubber skirts, fins, air directional devices and/or spoilers of any type under the car will not be permitted. A 2” inch maximum air deflector in front of the radiator for engine cooling will be permitted.
G. Door Panels
a. The side door panel(s) will be a maximum of 86” inches and a minimum of 60”-inches in front of the centerline of the rear axle when measured along the top plane. The door(s), front door extensions and
rear quarter panels must be flat and mounted in a vertical position. They must remain flat. Flanges at a 90-degree angle may be added to the front of the doors. The flange may only be added for the purpose of strengthening the door material The flange must not exceed 3⁄4”-inch in length or width and must be mounted in a vertical position. Door flanges must face inward toward the centerline of the chassis. Louvers, bead rolls holes and/or protrusions from top-to-bottom will not be permitted. Holes will be permitted for rub rails/nerf bars. A maximum 1”-inch long lip/flange at a 45-degree outward angle 1⁄2”-inch away from the sheet metal for reinforcement will be permitted at the top and bottom of the door(s) panels. All outside sheet metal, door panels, door extensions, air dams, front nose and/or hood fins must be the same shape, size and angle on both sides of the car. The door(s) must match each other from side-to- side (symmetrical). Air directional devices and/or side mounted spoilers of any type, which extend past the outside edge of the flat plane of the body will not be permitted.
b. Bead rolls around the outside perimeter of the door panels and the wing windows will be allowed. Bead rolled edges must face toward the center of the chassis.
c. The top of the door when measured from the ground will be a maximum of 38” and a minimum of 30”- inches when measured 60”-inches from the rear axle centerline. The rear of the door when measured from the ground will be a maximum of 42”-inches to the top of the door when measured 16”-inches from the center of the rear axle centerline of the rear forward.
d. The ground clearance on the bottom of the doors must maintain a maximum of 12”-inches and a minimum of 6”-inches from the ground.
e. A maximum lip and/or flange of 1-1/2”-inches rounded at 90 degrees and facing inward only, on the top and bottom door(s) and rear quarter panel(s) will be permitted.
f. A lip and/or flange angled out at a maximum angle of 45 degrees, extending away from the door at a maximum of 1⁄2”-inch and a maximum of 1”-inch in length before it bends inward for strength at the top of the door(s) and/or rear quarter panel(s) will be permitted.
H. Rear Quarter Panels
a. The rear quarter panels must be symmetrical in height, with or without plastic, no flare out and no holes.
b. The rear quarter panels must be a maximum of 47”-inches and a minimum of 40”-inches from the ground at the rear and continue in a straight line with the top of the door. (See drawing.).
c. A maximum 2”-inch fender flare may be used, but the overall body width must maintain a maximum of 68”-inches.
d. The rear quarter panels may extend rearward a maximum of 48”-inches when measured along the top plane of the rear quarter panel and a minimum of 44”-inches at the bottom when measured from the center of the rear axle to the rear of the car.
e. A maximum of 16”-inches and a minimum of 8”-inches of ground clearance (when measured from the ground to the bottom of the rear quarter) will be permitted.
f. The plastic / rubber material utilized on the rear of the car may extend a maximum of 16”-inches from the ground to a minimum of 8”-inches from the ground on either side of the car (symmetrical).
g. The panels may have one side plastic on one (1) side only provided the panel remains completely symmetrical.
h. Flanges at a 90 degree angle may be added to the Rear Quarter Panels. The flange may only be added for the purpose of strengthening the Rear Quarter Panel. The flange must not exceed 3⁄4”-inch in length or width and must be mounted in a vertical position. Rear Quarter Panel flanges must face inward toward the centerline of the chassis. Air directional devices and/or side mounted spoilers of any type, which extend past the outside edge of the flat plane of the body will not be permitted.
I. Rear Spoiler
a. A one piece, clear Lexan spoiler with a maximum height of 5”-inches from the rear deck will be permitted. Lettering and/or decals will not be permitted.
b. The rear spoiler must be non-adjustable from the cockpit and/or during racing conditions. Hinges, adjuster(s), slides and/or any other adjusting type device will not be permitted.
c. Metal gurney and/or table and/or flanges and/or lips will not be permitted.
d. A brake and/or bend on the top of the Lexan spoiler will be permitted for reinforcement. Maximum 1” lip.
e. The maximum overall height of the spoiler when measured from the ground must not exceed 50”-inches.
f. A maximum of four (4) symmetrical and perpendicular to the spoiler, vertical supports (a maximum of 2”- inches in vertical height and 10”-inches in length) for the purpose of fastening the spoiler to the rear deck will be permitted.
J. Rear Deck
a. The maximum height of the rear deck when measured from the ground will be 47”-inches and a minimum of 40”-inches.
b. The rear deck lid must be fully enclosed from side-to-side and have a maximum height of 10 1⁄2 ”-inches vertically behind the fuel tank.
c. The left and right rear trunk lids must be symmetrical in size and shape and must remain flat to cover the fuel filler hose and apparatus. The panel must completely cover the fuel cell, the fuel filler hoses and the vent lines.
d. Fuel tank must be completely enclosed from the bottom of this panel (rear deck) to the bottom of the fuel cell. (2020 Rule)
e. Openings from the top of the fuel cell to the bottom of the trunk lid will not be permitted. (2020 Rule)
f. (Optional) The fuel tank sides must be completely enclosed on each side from the front to the rear of the fuel cell and from the bottom of the cell to the rear deck. No holes and/or openings permitted in the side panels. The rear area of the fuel cell from the rear deck to the bottom of the cell must remain open.
K. Hood, Nose, and Front Spoiler
a. The maximum width for the hood, nose and front spoiler will be 36”-inches with a minimum width of 24”- inches. Louvers will be permitted on the sides of the hood.
b. The hood, nose and front spoiler must remain the same contour where they meet.
c. The nose-piece must not extend rearward of the front shock towers.
d. The front spoiler must be a separate piece.
e. Shock absorber covers and/or deflectors must not be a part of the nose or the spoiler and/or positively fastened to the nose in any fashion exceeding the 36”-inch maximum width.
f. Fabric material shock absorber covers will be permitted. The covers must not be used to achieve any aerodynamic advantage and/or to deflect air in a positive manner.
g. The maximum the spoiler may extend in front of the front axle centerline will be 20”-inches.
h. The front spoiler must be non-adjustable (hinges and/or sliders will not be permitted) and a minimum ground clearance of 4” (inches)
i. The hood shall be considered from the front roll cage to on top and in-line with the front of the radiator.
j. The hood and nose may have a maximum lip and/or flange of 2”-inches on both sides following the contour of the body. They must remain symmetrical.
k. The hood and nose be centered on the centerline of the frame.
l. The hood, nose and/or spoiler must not overlap each other’s location on the frame.
m. Any part of the hood must not exceed 10 degrees and the sheet metal must not have an opening and/or extrusion between the hood and the nose.
n. The hood must extend over the radiator and have complete sides.
o. The front spoiler may have a lip and/or flange a maximum 2”-inches on both sides following the contour of the spoiler not exceeding the maximum width of 36”-inches. The front spoiler may be offset 1”-inch from the centerline of the frame to the right or the left. One 2” high wicker bill may be added horizontally to spoiler in front of shock towers.
L. Hood Scoop
M. Interior Sheet Metal
a. All horizontal body support(s) other than the inner pods, whether in the front and/or rear must be a minimum of 1” x 1” .095”-inch thick tubing or 1”-inch flat stock a minimum of .125”-inch thick..
b. Inside and/or outside wings, spoilers, air foils and/or wind deflectors will not be permitted.
c. Double panels and/or sheet metal that is designed to create a wing effect will not be permitted.
d. A maximum 1”-inch reinforced flange will be permitted on all lexan; however, all specified measurements must be retained.
e. All interior sheet metal must completely cover all interior areas, door-to-door, quarter panel-to-quarter panel. Holes and/or openings will not be permitted in this area.
f. Front and rear firewalls are required. The front firewall must isolate the cockpit from the engine compartment. The rear firewall must extend from the top of the fuel cell to the belly pan to isolate the cockpit from the fuel cell. The firewall must be a minimum of .050”-inch thick aluminum and/or magnetic steel. The firewall may be altered and/or cut for drive shaft clearance.
g. Vertical fins, air dams and/or fairings on either side, behind the roll cage will not be permitted.
h. All sheet metal must be a flat single plane across the interior of the car. Two (2) bead rolls or breaks for the purpose of strengthening will be permitted. The maximum bead roll and/or break permitted will be 1/8”-inch in height and 1⁄2-“-inch in width.
i. Covered roll bars will not be permitted. Sheet metal that is one-piece and/or part of a body panel formed around tubing that is not considered an aerodynamic advantage will be permitted, provided there is no excess sheet metal.
j. Louvers will be permitted for cooling purposes only, including the radiator, engine and/or working oil cooler. Louvers and/or holes in the interior or exterior sheet metal will not be permitted.
k. The floor and/or belly-pan may not be any wider than the frame at any point. Lips, fins and/or air directional devices on the floor and/or belly pan will not be permitted. Louvers for the purpose of cooling will be permitted on the belly pan from the radiator to the firewall. The under pan must not extend in length past the rear of the seat and exceed the width of the frame rails of the car and must be a maximum of .090”- inches in material thickness.
l. Only aluminum belly pans will be permitted. Panels under the rear and and/or the fuel tank will not be permitted.
N. Driver Compartment
A full metal firewall fabricated from magnetic steel and/or aluminum must encompass the driver’s compartment from front-to-rear, on both sides and floorboards.
Seats must be “Full Containment” style constructed of aluminum to the general design specifications of current industry standards (SFI 39.2). Design shall include comprehensive head surround, shoulder and torso support system, energy impact foam, and removable head foam. Consult with your seat manufacturer for questions and recommendations regarding your seat safety system.
a. Seats manufactured using carbon fiber or composite materials must meet SFI 39.2 specifications.
b. The seat design should be one from a current manufacturer and/or recommended to include the full containment design. Installation of the full containment seat should follow the manufacturer’s instructions.
c. All cars must be equipped with a quick-release type steering wheel.
d. The driver compartment must have a starting switch and/or button within reach of the driver.
e. A clearly labeled electrical on/off ‘kill’ switch must be within reach of the driver and must shut off motor when in the off position.
f. Mirrors of any-type will not be permitted.
g. Radios and/or electronic and/or data communication devices will not be permitted.
h. Any edge and/or sheet metal end in and around the driver compartment must be protected with trim and/or beading and rounded. Sharp and protruding edges will not be permitted.
i. A substantial rock guard with a minimum of three (3) additional bars must be mounted in front of the driver. The rock guard must be made from wire screen. Windshield screens must be a minimum of .090- inches and must be securely fastened.
j. Fuel and/or power steering lines and/or fittings running through the driver’s compartment must be made from an approved braided type of line. High pressure lines and/or fittings and/or hot fluid lines running through the driver’s compartment must be encased and/or must have a shield.
k. Shoulder guards will be allowed on the right side of the drivers compartment but the entire panel must be built to be a form of a quick release. Front and rear edge to be attached by a Butterfly Dzus
fastener on the outside or a quick release button. Recommended front edge should have a quick release type of fabrication built or attached with Velcro. Back edge to be attached by Butterfly Dzus Fastener on the outside or quick release button. The opening from the bottom of the roll cage to top of arm guard is no less than 12 inches from front to back.
O. Numbers and Identification
a. The track and/or series Scoring Director reserves the right to issue and/or change a car number to prevent duplication and/or maintain proper records.
b. Team cars must be clearly identifiable from one another and use another number and/or letter.
c. All number and letter combinations will be limited to three digits. If three digits are used two (2) shall be the primary numbers/letter.
d. Number and/or letter combinations are required on the roof, nose, rear deck and both doors.
e. All numbers and letters must be a minimum of 18”-inches high on the roof and/or doors and 6”-inches high for the rear deck and 8”-incches the nose. All numbers and/or letters must be equal in size and displayed legibly whether decaled and/or painted.
f. The nerf bars must not block the visibility of the number and/or letter combinations.
g. Light bars will be permitted however, they can only be a maximum of eight (8) inches in length and cannot be the colors of yellow, red or green.
P. Bumpers, Side Bars, and Nerf Bars
i. All bumpers, side bars/nerf bars and/or bracing must be made from minimum 1-1/2 diameter round .095- -inch thick magnetic steel tubing only unless otherwise specified (See below for front bumper specs). All edges and/or corners on bumpers and side bars/nerf bars must be rounded. Sharp edges will not be permitted.
ii. The rear bumper and/or any side bars must not extend past the outside of the tire sidewalls on either the left and/or right side of the car.
b. Front Bumper
i. Only the front bumpers may be made from minimum 1-1/4 diameter round .095–inch thick magnetic steel tubing.
ii. The front bumper must consist of two (2) horizontal rails; an upper and a lower and a minimum of two (2) vertical braces, equally spaced, welded between the two (2) horizontal rails. The horizontal rails must be positively fastened with bolts or pins to the frame with four (4) sockets and/or supports. The front bumper must remain exposed without covering and/or any sheet metal fabrication surrounding it.
iii. The four (4) tubes that support the bumper from the four (4) frame sockets must be horizontal. These rails must be a minimum of 6”-inches and a maximum of 12”-inches apart when measured from the top to the bottom and maintain that measurement for a minimum width of 24”-inches and a maximum width of 30”- inches. The front bumper must also have an 18”-inch center when measured from the ground up to the middle of the bumper. The total width of the front bumper must not exceed 30”.
iv. The maximum the front bumper may extend from the centerline of the front axle is 24”-inches and a minimum of 20”-inches.
v. The front surface of the bumper must remain flat, parallel and perpendicular with the front of the nose piece for the full width of the bumper. V-shaped and/or any other type of shaped bumpers will not be permitted.
vi. The end bracing tube of the front bumper must be fabricated on an angle in such a way as to prevent the bumper of another car becoming interlocked. Please refer to the drawing at the back of this rule book.
c. Rear Bumper
i. The rear bumper must consist of two (2) rails, an upper and lower, which must have a minimum of four (4) sockets and horizontal support bars positively fastened with bolts or pins attaching it to the frame. The upper and lower rails must also be a minimum of 10”-inches apart and a maximum of 16”-inches apart from the top to the bottom and maintain that measurement for a minimum width of the 64”-inches and a maximum of 86”-inches.
ii. The rear bumper must have an 18”-inch center when measured from the ground to the middle of the bumper.
iii. The maximum the rear bumper may extend back when measured from the centerline of the rear axle is 52”-inches.
iv. The rear surface of the bumper must remain flat and parallel with the back of the rear quarter panel for the full width of the bumper. V-shaped and/or any other type of shaped bumpers will not be permitted.
d. Rub Rails
i. Solid rub rails and inner hoops with ballast added inside or outside will not be permitted.
ii. The rub rails must be exposed and outside the body panels. The left side rub rail may extend a maximum of 2”-inches outside the left rear tire sidewall.
iii. The rub rails must be bent with a gentle radius at a 90-degree angle and must protrude a minimum of 6”- inches back in past the body.
iv. The rub rails must be a minimum of 50”-inches long from socket-to-socket
v. All three attaching points must be fastened with bolts or pins.
e. Bumpers and Rub Rails
i. Only a minimum of 5/16” bolts with nyloc nuts and/or DIRTcar approved quick release solid pins will be permitted for positively fastening bumpers and rub rails to the car. Cotter pins and/or other fastening devices will not be permitted. Double rub rails will be allowed on Modifieds, 358 and Sportsman on left side only. Single rub rails only allowed on right side.
ii. All bumpers and rub rail sockets must have fasteners, pins and/or bolts with a minimum diameter of 5/16”- inch.
iii. The front and rear rub rails must have a 360 degree sleeve a minimum of 3/8”-inch wide x .095” thick magnetic steel welded to the rub rail tube butted against the support socket to prevent pins from shearing. Refer to the drawing at the back of this rule book.
Section 8 – Suspension
Suspension designs and applications are constantly evolving. Although the intent of the suspension rules is an attempt to accommodate the majority of suspension and suspension component designs and applications currently being used in competition, the rules cannot be absolute. Any and all new designs or modifications to an existing suspension and/or suspension component must be communicated to and approved by the DIRTcar Racing before being used in competition.
A. Front End
a. The front axle must be a straight, one-piece axle manufactured from magnetic steel tubing. Only approved camber adjustments and/or camber adjustment devices will be permitted. Any other camber adjustments and/or will not be permitted.
b. Split axles and/or dropped axles and/or independent front suspension(s) will not be permitted.
c. All brackets on the front axle must be welded and/or bolted. Bird cages and/or sliders will not be permitted.
d. Only approved Modified front spindles will be permitted.
e. Bearing shafts that are made of steel are recommended.
f. The chassis may be offset a maximum of 4”-inches from the center of the inside tire width measured from the inside of the left front tire to the inside of the right front tire at axle height. Refer to the drawing in the back of this rule book regarding front and rear end offset details.
g. The front wheels and tires must remain fully exposed. Fenders and/or air deflection devices of any type will not be permitted.
B. Shock Absorbers
a. Only one (1) shock per wheel will be permitted, total of four (4) shocks per car.
b. Externally adjustable shock absorbers will not be permitted. Shock absorbers with Schrader valves will be permitted.
c. External reservoir type shock absorbers will not be permitted.
d. All shock absorbers must be an ‘in-stock’ item with manufacturers. Custom shock absorbers and/or shock absorber components will not be permitted.
e. Prior to introduction into competition a new design shock absorber must be submitted to World Racing Group / World of Outlaws Officials for approval. Shock absorber manufacturers may be required to provide a board of components for inspection and display.
f. All Shock absorbers must be constructed of magnetic steel and/or aluminum.
g. Only conventional type closed shock absorbers and/or approved shock absorbers will be permitted for competition. Only single shaft shock absorbers will be permitted, and all shock absorbers must remain closed on one (1) end via conventional design. No internal bump stops inside shocks for rebound or compression.
h. Electronically controlled shock adjustments by any means or method are not permitted.
i. “Through-rod” designs are not permitted.
j. Communication; hydraulically, electronically, magnetically, or otherwise, between any two or more shocks on a vehicle is strictly prohibited. This includes “cross-over” shocks.
k. Inerter style dampers, either mechanical or hydraulic, or other type of primarily acceleration sensitive damping device is not permitted.
l. Air shocks not allowed.
C. Suspension Components
a. Independent front and/or rear suspensions will not be permitted. No Cantilever suspensions allowed.
b. A-Frames and/or ball joints will not be permitted for steering axis (kingpin only).
c. Four-wheel steering actuated by the steering wheel and/or of any type will not be permitted.
d. All suspension systems (including travel limiters) and designs must be mechanical. Hydraulic, pneumatic (air), electronic, radio and/or computer assisted for adjustments, and/or in-or-out of cockpit type suspensions, and/or suspension adjustment systems will not be permitted. Only one travel limiter permitted per car.
e. Traction control of any type, including within the braking system is not permitted.
f. Only a single brake bias and shut off along with single side, mechanical rear panhard adjustment will be permitted in the cockpit. Any other type of adjustment will not be permitted in the cockpit.
g. Only double-sided torque arms (two) will be permitted and must be mounted in a fixed perpendicular position to the rear end. Front slider rods and the torque arms attaching point must be centered in chassis (left to right). Both sides of the torque arm assembly (right and left) must be symmetrical in size and shape. Both sides of the torque arm assembly (right and left) must be attached to the center pick up point.
h. Spring rods allowed on right rear radius rod only. Must be a conventional approved spring rod. No externally mounted shocks attached to radius rod. No Rubber biscuits allowed on the left rear radius rod.
i. Only conventional type aluminum birdcages. All Bird cages must be clamped or fixed to rear end tubes and cannot move. Maximum bracket thickness 2”” (inches). Any new birdcage designs must be approved.
j. The only materials used to fabricate axle housing mounts (birdcages) that will be permitted is aluminum unless approved by DIRTcar. Axle housing mounts fabricated of exotic, heavy materials will not be permitted.
k. When fabricating axle housing mounts detail must be paid to functionality. The completed axle housing mounts, when comparing the right and the left side, must be as similar in design as possible.
D. Rear Suspension Attaching (Radius) Rods
a. Only one radius rod per side will be permitted to locate rear end to chassis. (No Four link style suspension will be permitted).
b. Radius rod must be mounted in a fixed position front and rear.
c. The only materials used to fabricate attaching (radius) rods that will be permitted are magnetic steel or aluminum
d. Aluminum attaching (radius) rods must be tubular material only. Magnetic steel attaching (radius rods) must be tubular with a maximum wall thickness of 3/16 inch.
a. Any type and/or form of spring will be permitted (torsion bar or coil spring)
b. Helper single spring allowed on right rear only with torsion bar rear suspension.
c. Coil springs must be manufactured from magnetic steel.
d. Spring preload adjustments for coil springs must be made using mechanical adjusting nuts on the shock body. No coil spring pre-loader assemblies permitted.
e. Other than spring dampening by the shock absorber, hydraulic, pneumatic, or electrically controlled adjusting devices, (static or dynamic) that affect spring preload or race car heights will not be permitted
f. Stacked coils allowed, maximum two (2) coils per corner. Lockout nuts allowed. No external bump stops or bump springs of any kind on the shock shaft Nothing may be added to the shock shaft other than a normal sized travel indicator O ring and a and a maximum of one 2 1⁄4 high foam type rubber (no neoprene) will be allowed to stop bottoming of shock. No internal bump springs inside shock for rebound or compression. No frame mounted neoprene or solid snubbers, bump springs or travel limiting devices other than a droop limiter as described in section 17.8.3-d of the DIRTcar modified section of the rule book.
g. Conventional style spring insert(s)/(rubber(s) per corner that does not exceed the length of one full coil will be permitted.
a. All cars must have four (4) wheel hydraulic brakes in good working condition. Random brake inspection may take place throughout the season.
b. Carbon fiber, carbon, titanium, ceramic, aluminum pads and/or rotors will not be permitted.
c. No floating mounted brake calipers.
d. Brake bias may be adjustable through the cockpit.
e. Manual brake shut offs will be permitted. An electronic brake shut off switch will also be allowed on the right front only.
f. Rear brake calipers must be approved aluminum 4 piston designs and must be operational. Maximum rotor diameter 12.19” diameter by 1.25” thick and must be vented. No solid rotors with the exception of the 3/8” rotor.
G. Wheelbase and Tread Width
a. The minimum wheelbase is 106”-inches and a maximum of 110”-inches with a maximum tolerance of 1⁄2”, when measured from the centerline of the rear axle to the centerline of the front axle for both left and right sides.
b. The maximum front tread width will be 86”-inches with a minimum of 74”-inches. The maximum rear tread width will be 86”-inches with a minimum of 80”-inches. These measurements will be taken from the outside edge of the sidewall of the tires on each side with a maximum tolerance of 1⁄2”.
Section 9 – Rear End Droop
A. For 2024 all cars must have underslung 1 1⁄2” (inch) bars under the rear-end with a maximum of a 1⁄2” drop below the bottom of the 2 X 4 frame rail. (Please refer to drawing in 17.16). Note ** For all chassis manufactured before 2023 and not updated to 2024 rule, the bottom of the rear-end will have a maximum of a 1⁄2” drop below the bottom of the 2 X 4 frame rail.
Section 10 – Roll Cage
A. Only round magnetic steel tubing 1-1/2” and/or 1-3/4” in outside diameter with a material thickness of 1- 3/4”-.095”-inches and/or 1-1/2”-.120”-inches will be permitted.
B. The roll cage must be an integral and structural part of the frame. All frames built in 2005 and after must have a manufacturer’s unique serial number plate visible and positively fastened on the left front roll cage upright. The letters and/or numbers shall not exceed 8 digits and be 1⁄2”-inch in height. See drawing 4.7.2
C. Front and rear roll bars must be positively fastened in a cage-type configuration. Two (2) round horizontal side bars on each side are required. The top side bar must be a maximum of 22”-inches below the top roll bar.
D. Proper bracing and triangulation on the front and rear roll bars is required. All roll bar bracing material must be 1-1/2”-inches outside diameter with a material wall thickness of .095”-inches. A minimum of one (1) 1” diagonal bar across the top of the roll cage is required.
E. The rear main roll bar hoop must be a minimum of 26”-inches when measured across the outside-to- outside of the hoop and maintain that measurement from the top to the bottom of the cage. The bottom of the rear main roll bar hoop must be positively fastened (welded) to the 2”x4” frame rails. Outriggers will not be permitted.
F. The front roll bar hoop must be a minimum of 26”-inches when measured across the outside-to-outside of the hoop and maintain that measurement from the top to the bottom of the cage, with the exception of the allowable frame taper. Outriggers will not be permitted. Refer to the drawing in the back of this rule book.
G. MANDATORY Frame/Roll Cage update: A piece of tubing, a minimum of 1-1/4” in outside diameter and .095”-inches in thickness, must be installed vertically and must extend through the car into the bottom frame rail or extend back to the union at the top of the door and rear main hoop joint. The tubing must be installed in a manner that does not impede the driver exiting the cockpit. The tubing must be mounted a minimum of 9” inches and a maximum of 12”-inches on the roof bar from the existing rear roll cage hoop. This must be installed symmetrically on both sides of the roll cage. Existing cars must be retrofitted with this piece of tubing.
Section 11 – Wheels
A. Only aluminum wheels will be permitted for competition. Magnesium, steel, carbon fiber and/or any other exotic type material will not be permitted.
B. ‘Bleed-off’ and/or ‘Bleeder’ valves will be not be permitted.
C. The maximum rim width will be 14”-inches when measured from the inside of left bead to the inside of the right bead of the wheel. Only wheels 15”-inches in diameter will be permitted.
D. Beadlocks will be permitted. Any wheel utilizing a beadlock must maintain a minimum diameter hole of 11” or 5” inches inside the beadlock and the wheel. Beadlocks may only be used on the outside of the wheel.
E. Wheel spacers must be aluminum.
F. Maximum wheel weight 28 lbs. Weights of any kind, added to wheels other than conventional balancing, are not permitted.
G. Wheel covers: it is highly recommended that wheel covers have a minimum of 5 mounting points. However, both 5 and 3 mounting point wheel covers will be allowed for competition under the following conditions: Wheel covers having a minimum of 5 attachment points may continue to use steel dzus fasteners. Said dzus fasteners must be made of steel only. No Adjustable expansion mounting rings allowed.
H. No plastic wheel covers.
I. Wheel covers having only 3 attachment points must be bolted-on at all 3 points utilizing a minimum 5/16”, flanged steel bolt and an approved fastening (nut assembly) system.
J. Approved fastening (nut assembly) systems:
a. Keyser Manufacturing: Part #100 7-101.
b. Wehrs Manufacturing: Part # WM377A-312 (Aluminum 5/16) / WM377S-312 (Steel 5/16)
c. Triple X Chassis: Part # SC-WH-7810 (for a 1” spring) / SC-WH-7820 (for a 1 3/8” spring)
d. Smith Precision Products: Part # MC-516-18
e. Optional fastening systems that are equal or superior to the above-approved system will be readily approved at the sole discretion of Technical Officials.
K. Foam inserts may be permitted
L. A minimum of five (5) lug nuts on the rear wheels will be required. A minimum of three (3) lug nuts will be required on the front wheels. Knock off hubs of any type on any wheel will not be permitted.
Section 12 – Tires
A. Only Hoosier Racing Tires will be permitted in any DIRTcar sanctioned events. Hoosier (the tire manufacturer) will mark/stamp/brand all legal tires with specified compound and/or other specific DIRTcar designations as listed below
a. Big Block, 358 Modifieds and Sportsman:
i. D300, D400 or D500
b. Tire Size and Compound Designation:
i. Left Front – 11/82-15
ii. Right Front – 13/82-15
iii. Left Rear – 13/87-15
iv. Left Rear – 13/89 – 15
v. Right Rear – 13/92-15
B. The altering of any tire compound, by any means will not be permitted. Chemical alteration of the tread carcass and/or tread compound, such as tire ‘soaking’ and or the introduction of tread ‘softener’ and/or the physical defacement (removal, altering and/or covering) of tire sidewall markings in any manner will not be permitted. If any competitor is found to have altered their tires any penalty deemed appropriate by Super DIRTcar Series and/or DIRTcar Officials may be issued. Tires may be protested by another competitor following the protest rules as stated in section 11.2.
a. Any tire may be inspected and/or analyzed for alteration at any time. This will consist of a process as determined by the independent laboratory that performs the analysis. A “Chain of Custody” process will be outlined with the competitor upon inspection of the tires.
b. The analysis process will require shipment of the tire to the selected laboratory. Additional race event(s) may be completed before a determination is made. If a penalty is issued, the event(s) that fell into the analysis time period while the tire(s) were being analyzed may be considered as part of the penalty time period.
c. Reference Section 5.3.D. for Competitive Analysis, Section 11.1.S & T for Penalties and/or Section 11.2.I for Protest(s).
C. Removable duct tape, provided it does not deface the tire, to cover the D-Number will be permitted.
D. Heating of the tires by torch, blanket, heating device(s), exhaust system and/or any other method will not be permitted.
E. Inner liners or sidewall stiffeners of any type will not be permitted.
F. A tire durometer may be used during the tire inspection process, provided baseline tire(s) have been read at the event prior to inspection.
Section 13 – Personal Safety Equipment
a. Each competitor is the solely responsible for the effectiveness and proper installation, per the manufacturer’s specifications, of personal safety equipment and determining it to be adequate for competition at every event. Each competitor is expected to investigate and educate themselves for continuing improvement regarding their own personal safety equipment.
b. Different safety regulations may be in place depending on the local and/or state government rules and/or laws and/or regulations in the specific location of the racetrack. Helmet and seat belt dates and/or specified equipment requirements, worn, utilized and/or otherwise may be different than specified in the rule book. Contact your local track officials for more information regarding this.
c. Each division section (17 to 20) will cover the General and Specific Safety and Personal Protection minimum requirements. All participants are solely responsible to meet the requirements in the specific division.
B. Seat Belts and Restraint System
a. Each car must be equipped with minimum of an SFI 16.5 or SFI 16.1 approved restraint system. Restraint system will be eligible for use in competition until the expiration date or for 2 years from date of manufacturer. Seat belt restraint systems shall be installed and used in accordance with manufacturer’s instructions.
b. In any type of manufacturer’s installation, the fasteners must be as supplied by the manufacturer.
c. Seat belt material should not be permitted to come in contact with any sharp or metal edge, including when the material passes through the seat.
C. Protective Clothing
a. All drivers will be required to wear a fire-resistant driving uniform meeting minimum of the SFI 3.2A/5 specification and display a valid SFI 3.2A/5 label on the outside of the uniform.
b. Drivers must wear gloves at all times they are on track. Driver’s gloves must meet or exceed the SFI 3.3 specification and have a legible and valid SFI 3.3 label.
c. Drivers must wear shoes that meet minimum of the SFI 3.3 specifications and display a valid SFI 3.3 label.
a. All current seats must be full containment type constructed of aluminum or approved carbon fiber and must adhere to the general design specifications of SFI 39.2 seat construction standards. Design shall include comprehensive head surround, shoulder and torso support system, energy impact foam, and removable head foam.
b. Carbon fiber seats must have a current valid SFI 39.2 certification.
c. SFI 39.2 seat compliance is recommended for World of Outlaws Late Models, Super DIRTcar Series, DIRTcar 358 Modifieds, DIRTcar Late Models & Pro Late Models, DIRTcar Sportsman, UMP Modifieds and Pro Modifieds, DIRTcar Pro Stocks.
d. Seats must be used as supplied and installed following instructions provided by the seat manufacturer
e. If the left side head surround is 7 inches or less when measured from the back of the headrest, then a left side head net meeting the SFI 37.1 must be installed with a quick release latch. A minimum left side head surround of 4 inches is required.
a. All drivers must wear a full-face helmet with a minimum safety rating of, FIA 8860-2018, Snell SA 2020, Snell EA 2016, Snell SA 2015.
F. Head and Neck Restraints
a. Drivers, at all times they are on the track, must have their helmets correctly (following manufacturers installation and use instructions) connected to an approved head and neck restraint.
b. The head and neck restraint must be SFI 38.1 approved and display a legible and valid SFI 38.1 label.
G. Fire Suppression
Required for Late Models, Super DIRTcar Series, Big Block Modifieds, DIRTcar 358 Modified, DIRTcar NE Sportsman and DIRTcar NE Pro Stock. It is recommended for all other divisions.
a. All racecars shall be equipped with a thermally deployed automatic fire suppression system. The fire suppression system will consist of a DOT approved cylinder manufactured from aluminum or steel with a capacity of ten (10) lbs. of fire extinguishing agent, steel or steel reinforced lines, and has a minimum of two (2) thermally activated discharge nozzles.
b. All systems must meet or exceed SFI 17.1 specifications.
c. Systems must be fully charged with ten (10) lbs. of DuPont FE-36, 3M NOVEC 1230, FireAde or 4Fire and display a legible and valid SFI and manufacturer label depicting fire extinguishing agent, capacity, and certification date. Cylinders that are beyond useful certification date must be inspected, serviced and re-labeled by the manufacturer.
d. Cylinders must be mounted forward of the fuel cell. Cylinders must be securely mounted to the frame/roll cage assembly. The certification label must be unobstructed and easily accessible for inspection when the mounting is complete. For systems with one activation point, the activation point may be mounted in the cockpit or rear of the car close to the fuel cell.
e. The cylinder must be connected to the nozzles with steel or steel reinforced lines.
f. Two (2) thermally activated nozzles must be used. One (1) nozzle must be located directly above the fuel cell in the fuel cell area and the second nozzle located in the driver cockpit area.
g. An optional manual override cable is recommended for two (2) thermal automatic nozzle systems but is mandatory for systems with one (1) activation point.
h. Fire Suppression bottles must remain on during all racing events. If a bottle is found to be turned off during an event, a fine of $100 will be put in place. A second offense to the same driver will result in a $300 fine. Third offense will result in disqualification, loss of points and money along with probation.
i. If a Fire Suppression Bottle is found to have been tampered with at discretion of DIRTcar officials it will be a $500 fine.
Super DIRTcar Series, Big Block Modifieds, 358 Modified and Pro Stock only.
j. Cylinders must be mounted forward of the fuel cell just above the deck or below the deck.
i. (Pro Stocks should be mounted behind the seat below deck or inside cockpit area, passenger side of driveshaft and must be easily visible)
k. Cylinders must be securely mounted to the frame/roll cage assembly and centered in the chassis.
a. Only SFI 45.1 roll bar padding may be used. Knee, steering pads and/or additional padding may be utilized.
b. All teams should have an easily accessible fire extinguisher or its equivalent in the team’s pit area.
Section 14 – Miscellaneous
A. Cars will not be permitted to make a qualifying attempt without passing technical inspection. All cars must be available for inspection prior to the time of the driver’s meeting. All cars must come to inspection race ready, if not, car will not be inspected and asked to return to the pit area to make proper changes. Following the driver’s meeting, covers of any-type on the racecar will not be permitted.
B. All fuel lines, power steering lines and/or fittings running through the driver’s compartment must be made from a braided or other approved type line. Plastic and/or glass fuel filters will not be permitted.
C. All cars may be subject to technical inspection at any time.
D. Full or partial car covers will be permitted only when there is inclement weather, and/or the car is in its designated pit stall. All covers shall be removed prior to the car leaving its designated pit stall.
E. Roll bar padding mandatory on all roll bars that helmet may come in contact with. Knee and steering pads and/or padding is recommended.
F. All teams must have a fire extinguisher in the rear of their transporter with the car number clearly visible on the extinguisher. The fire extinguisher must be a minimum of 20lbs and is recommended to FFF type chemical and/or DuPont FE 36 and/or equivalent.
G. Fire Suppression Systems Cylinders are mandatory and must be mounted forward of the fuel cell, behind the seat below the deck or just above the deck (Pro Stocks should be below deck or mounted inside the cockpit, right-side of driveshaft and must be easily visible). Cylinders must be securely mounted to the frame/roll cage assembly and centered in the chassis. SFI certification along with manufacturers date must be clearly visible.
H. All drivers are required to have a one-way radio. The one-way radio must be working and active prior to any ‘on-track’ activity. Two-way radios, crew-member to driver and/or any other means of electronic communication, other than the one-way radio will not be permitted. ONEWAY RADIO MUST NOT BE ABLE TO SWITCH BETWEEN TWO OR MORE PROGRAMMABLE CHANNELS.
I. Seven (7) days prior to any scheduled and/or sanctioned one (1) day DIRTcar Northeast Series event paying less than $20,000-to-win race teams will not be permitted to rent, test and or attend any practice session(s) at the scheduled track, unless approved by DIRTcar. Any race team and/or driver in violation will be given one (1) lap of qualifying and the best their qualifying position that will be earned is 50% + 1 of the entered cars for that event.
Section 15 – Series Decals and Patches
A. All participants will be required to display decals as provided on the decal verification sheet prior to entering into competition. If any required decal is not displayed loss of any awarded money will be the penalty.
B. A series decal is required on both sides of the car. Driver must display the series patch on their uniform to receive point fund awards.
C. Contingency and sponsorship awards; any team participating must meet the requirements of the award(s) such as decals, patches, product use and verification. There will be a written deadline presented to the teams prior to the start of each season for each element to be in place for the award requirements. If it is an existing program it will roll over from the prior season and the program will begin at the first race of the season.