602 Late Model 2024

TIRES: A. Rear Tires and Right Front must be American Racer Pro 2 or Pro 3 B. Left Front Tire may be Hoosier Spec or AR Spec or approved equal  May open existing lines with #1 Blade Only. No cutting edges. No Chemicals 

2. Full Fire Suit (top and bottom or one-piece) Gloves and Shoes is required (SFI rating optional, but
highly recommended).
3. Snell rated SA2010 or SA2015 full-face helmet required.
4. Must have head and neck restraint system or Full containment seat.
5. All cars must have a kill switch within easy reach of the driver, and clearly marked “Off” and “On”.
6. All cars must have a quality fuel cell with roll over valve (check valve) in fuel cell vent.
7. Must have SFI-Approved five-point safety belts, mounted securely to the roll cage. (Recommend belts
be no more than two years old.)
8. Any pre-race technical/safety inspection and car or equipment is deemed unsafe by officials will result
in not being allowed to compete. Official’s decisions are final!
9. Receiver one-way radios are REQUIRED at every sanctioned event. Failure to have a Receiver (or
equivalent one-way device) could result in disqualification. Malfunction of such device (i.e., dead
battery, ear phone failure, etc.) will not constitute any penalty.
10. NO two-way radios, cell phones, or other communication devices will be allowed. Receiver is the
ONLY communication device permitted. Drivers caught with any other communication device will be
disqualified for that event (heat or feature).
11. No signal devices (light sticks,painted/taped sticks, flashlights, cell phones, etc.)
12. No mirrors.
ENGINE RULES:
1. CHEVROLET PERFORMANCE PART NUMBER 88958602/19258602
2. THE SEALED ENGINES MUST REMAIN INTACT AND NOT BE TAMPERED WITH. ANY SEALS THAT
HAVE BEEN REMOVED OR TAMPERED WITH WILL MAKE THE ENGINE ILLEGAL AND NOT ELIGIBLE
FOR COMPETITION. THE PENALTY FOR ANYONE TAMPERING WITH SEALS, MODIFYING ANY
INTERNAL ENGINE PARTS, OR CHANGING THE PARTS FROM STOCK AS DELIVERED SEALED
FROM THE FACTORY WILL BE SUBJECT TO EXPULSION FROM RACING WITH ANY THUNDER
SERIES SANCTIONED EVENT FOR THE REMAINDER OF SEASON AND FUTURE SEASONS.
3. ANYONE RUNNING A RESEALED ENGINE MUST HAVE CERTIFIED CABLE SEALS FROM A CERTIFIED
ENGINE BUILDER.
4. NO CHANGES ARE ALLOWED TO THE ENGINE – INCLUDING BUT NOT LIMITED TO INTAKE
MANIFOLD, HEADS,VALVE COVERS, FRONT COVER, OIL PAN, HARMONIC BALANCER, OR ANY
OTHER PART/OR PARTS ON/OR IN
5. NO VACUUM PUMPS
6. ALL CRATE ENGINES MUST REMAIN STOCK AS THEY CAME SEALED FROM THE FACTORY. CRATE
ENGINES MUST NOT BE ALTERED, MODIFIED, OR CHANGED FROM FACTORY SPECS.
7. THERE WILL BE A $1000 PROTEST ON A CRATE ENGINE WITH A $200 ACCEPTANCE FEE $800 WILL GO
TO THE ONE PROTESTED AND $200 WILL GO TO THE SERIES.
SEALS:
1: CHEVROLET PERFORMANCE CAP SEALS
2: CRATE RACING USA SEALS
3: EAGLE
4: FASTRAK
5: MID EAST
6: IF YOU HAVE ANY OTHER SEALS CONTACT SERIES TO FIND OUT IF LEGAL OR NOT
7: NO BREAK OFF BOLT STYLE SEALS ARE ALLOWED. IF YOU HAVE THESE SEALS YOU ARE SUBJECT TO BE
INSPECTED TO PROVE ENGINE LEGAL AT YOUR COST.
CARBURETOR RULES:
1: ONE 4 BARRELL CARBURETOR
2: ENGINE MUST BE NATURALLY ASPIRATED
3: MAY USE ONE 1 INCH, ONE PIECE, CARBURETOR SPACER (.040 TOLERANCE MAXIMUM) AND TWO
STANDARD PAPER GASKETS (MAXIMUM 0.070 INCH THICK); ONE GASKET BETWEEN INTAKE TO SPACER
AND ONE GASKET BETWEEN SPACER TO CARBURETOR
4: NO SUPER BOWLS
DISTRIBUTOR RULE:
1. MSD IGNITION SYSTEM. NO CRANK TRIGGER, DISTRIBUTORLESS MULTI-COIL,OR MAGNETO IGNITION
SYSTEM. 6AL OR 6ALN, or MSD 6CT IGNITION BOX ALLOWED. (NO 6CT PRO)
MUST BE A 6300 CHIP OR SET AT 6300.
1A: IF USING ANY MSD BOXT THAT DOES NOT TAKE THE CHIP MUST HAVE WORKING TACH IN CAR.
2. NO ELECTRONIC TRACTION CONTROL DEVICE
3: CAN RUN HEI TYPE DISTRIBUTOR BUT MUST HAVE SOFT TOUCH BOX WITH 6300 CHIP.
4: IF YOUR CAR HAS TWO MSD BOXES IT MUST HAVE A 6300 CHIP IN EACH BOX NO MATTER WHAT.
5: $350 CLAIM RULE ON THE MSD BOX
STARTER RULE:
1. ALL CARS MUST HAVE WORKING STARTER
EXHAUST RULES:
1. COLLECTOR TYPE HEADERS REQUIRED. MUST HAVE FOUR (4) TUBES INTO ONE (1) COLLECTOR OF A
CONSISTENT DIAMETER
2. MUFFLERS NOT REQUIRED UNLESS TRACK MANDATED. IF/WHEN MANDATED: MUFFLERS MUST HAVE
SOME TYPE OF INTERNAL NOISE DAMPENING CHARACTERISTICS (BAFFLES, EXTRUDED HOLES, SCREEN,
CHAMBERED, ETC.) MUFFLERS MUST MEET LOCAL SPEEDWAY’S NOISE DECIBEL REQUIREMENTS.
EXTERNAL MUFFLERS ONLY.
3. NO TRI-Y HEADERS
4: $400 CLAIM RULE ON HEADERS. IF MUFFLERS ARE WELDED TO HEADERS THAT IS ONE PIECE AND
MUFFLERS GOES WITH THE HEADERS IF THEY ARE BOLTED TOGETHER YOU CAN KEEP THE MUFFLERS.
WATER PUMP
1: CAST OR ALUMINUM PERMITTED. STOCK MOUNTED WATER PUMP AND FANS ONLY. NO ELECTRIC
FANS
2: NO ELECTRIC WATER PUMPS.
SUSPENSION:
1: LATE MODEL SUSPENSIONS ONLY. NO SPRING LOADED OR SHOCK TYPE 4 BAR RODS. ONLY
STANDARD SOLID BAR 4 BAR RODS. NO TORSION BAR FRONT OR REAR SUSPENSION. SWAY BAR OK
2: ONE (1) COIL SPRING PER WHEEL. FLAT HELPER SPRING OK. NO STACK SPRINGS ON ANY CORNER
INCLUDING 5TH COIL. ONE RUBBER BUMP STOP ALLOWED ON RIGHT FRONT ONLY. MAY CUT
3: ONE SPRING RUBBER PER CORNER
SHOCKS:
1: OIL SHOCKS (SPLIT VALVE PERMITTED) OR GAS SHOCKS PERMITTED. NON ADJUSTABLE/ NON
CANNISTER ONLY. NO AIR SHOCKS ALLOWED.
1A- NO INTERNAL BUMPS
2: THERE IS A $250 BUY RULE PER SHOCK. ALSO, YOU CAN ADD $150 AND BUY THE COMPLETE
ASSEMBLY (LESS SHOCK COVER). MUST BE IN THE TOP 3 TO BUY. IF YOU REFUSE ANY CLAIM, YOU WILL
BE DISQUALIFIED AND LOOSE ALL POINTS AND SUBJECT TO SUSPENSION AND/OR FINE. THIS PROCESS
WILL BE WATCHED BY TECH MAN AND THE PERSON BUY SHOCK.
3: ONE SHOCK PER CORNER EXCEPT LEFT REAR. YOU MAY RUN A DRIVE SHOCK.
TRANSMISSION:
1: BERT, BRINN OR FALCON ALLOWED
2: NO STRAIGHT DRIVES OR IN AND OUT BOXES.
3: IF RUNNING BALL SPLINE TRANSMISSION CARBON FIBER DRIVESHAFT MANDATORY.
DRIVESHAFT:
1: CARBON FIBER ALLOWED AND RECOMMENDED FOR SAFETY.
REAREND:
1: STANDARD QUICK CHANGEREAR END PERMITTED. NO TITANIUM OR EXOTIC MATERIALS AXILS,
SPOOLS, GEARS, OR OTHER MATERIALS INSIDE REAR END.NO SMALL TIGER REAR ENDS.
BRAKE RULES:
1. STEEL BRAKE ROTORS ONLY. NO CARBON FIBER BRAKES. NO TITANIUM BRAKES OR OTHER EXOTIC
MATERIAL BRAKE SYSTEMS
TIRES:

1: NO CHEMICALS: TIRE PROTEST IS $125 PER TIRE AND WILL BE SENT TO A LAB FOR RESULTS. LAB
RESULTS ARE FINAL. ACCEPTANCE FEE IS $125 PER TIRE. WE WILL CUT TIRE WITH A GROOVING IRON
BLADE AND TAKE TWO SAMPLES FROM EACH TIRE TO SEND OFF. IF TIRE SAMPLE COMES BACK WRONG
YOU WILL LOSE YOUR MONEY AND POINTS FROM THAT RACE AND YOUR ACCEPTANCE FEE MONEY.
THERE WILL BE OTHER RACE PENALTIES TO BE DETERMAINED BY SERIES.
3: WILL PUNCH TIRES AT ANYTIME ANY TIRE PUNCHING BELOW WHAT WE FIND TO BE A NORMAL
PUNCH CAN BE SAMPLED AND SENT TO A LAB FOR FUTHER TESTING. MAY PUT A NUMBER PUNCH RULE
IN BY FIRST OF THE YEAR.
4: MAY CUT CROSS BARS IN EXITING BLOCKS ONLY. ANY ADDITIOINAL GROOVING TBD DEPENDING ON
TIRE SUPPLY.
WHELLS:
1: STANDARD 15X14 INCH WHEELS.
MIRRORS:
1: NO MIRRORS.
RADIOS:
1: NO RADIOS, CELL PHONES OR ANY OTHER COMMUNICATION DEVICE ALLOWED IN CAR AT ANY TIME.
IF FOUND WILL BE DISQUALIFIED FOR THAT EVENT.
2:RACECIEVER REQUIRED AT ALL TIMES WHILE ON THE TRACK
BODY:
1: MUST FOLLOW CRUSA BODY RULES
WEIGHT:AND WEIGHT BREAKS
1: BASE WEIGHT IS 2400
1A: IF RUNNING 93 PUMP GAS OR VP 110 YOU WILL BE GIVEN A 50 POND WEIGHT BREAK
2: NO BURN OFF AFTER RACE
3: WE WILL WEIGHT BY THE SCALES AT EACH TRACK. (5 POUND TOLERANCE)
4: NO WEIGHT BREAKS FOR CONTAINMENT SEATS OR NECK RESTRAINTS ANYMORE OR FIRE SYSTEM
FUEL:
1: NO METHANOL. CAN RUN E85.
2: SPECIFIC GRAVITY NOT TO EXCEED .744 AT 60 DEGREES ANY FUEL EXCEEDING .745 WILL BE
DISQUALIFIED. FUEL PROTEST WILL BE $50 PAID TO THE SERIES TO BE CHECKED AT THE TRACK OR $150
TO BE SENT TO OUTSIDE LAB.
3: VP RACING FUEL IS THE SERIES RECOMMEMDED FUEL
4: YOU CAN NOT MIX 93 AND 110 AND RECIEVE WEIGHT BREAK.