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FLORENCE MOTOR SPEEDWAY

2019 THUNDER AND LIGHTNING

BODIES
1. ANY AMERICAN MADE 1968-2018 MODELS WITH A MINIMUM 102” INCH
WHEELBASE
ENGINE
1. MUST BE OEM STOCK, FOR MAKE AND MODEL IN STOCK LOCATION LEFT TO
RIGHT , FRONT TO REAR
2. HYDRAULIC CAM ONLY, AFTERMARKET MAX LIFT AT VALVE .425 INTAKE AND
EXHAUST
3. 350 CUBIC INCH CHEVROLET
4. 351 CUBIC INCH FORD
5. 360 CUBIC INCH CHRYSLER
6. OVERBORE .040 MAX
7. ENGINE MAY BE CHECKED WITH P&G C.I. GAUGE TO CHECK CUBIC INCHES
8. OEM STOCK OR OEM REPLACEMENT PARTS FOR CAR AND ENGINE. INCLUDING
CYLINDER HEADS, PISTONS, CRANKSHAFT, AND RODS
9. STOCK OEM FUEL PUMPS
10. OEM STEEL WATER PUMPS, CRANKSHAFT, AND PULLEY COMBINATION MUST
BE USED
11. NO HIGH PERFORMANCE HEADS
12. HEADS MUST BE STOCK NO GRINDING, POLISHING, NO PORT MATCHING,GLASS
BEADING,
13. STANDARD OEM 3 ANGLE VALVE JOB
14. NO CUTTING HEADS FOR LARGER VALVE SPRINGS STOCK OEM VALVE SPRING
RETAINERS
15. STEEL POLY LOCKS PERMITTED, OEM STOCK RATIO ROCKERS ONLY
16. STUDS IN HEAD MAY BE SCREW IN BUT OEM STUDS AND GUIDE PLATES
17. MAXIMUM OEM VALVE SIZE REQUIRED
INTAKE
1. NO MODIFICATIONS ALLOWED NO GRINDING, POLISHING, PORT MATCHING,
GLASS BEADING
2. OEM CAST IRON OR EDELBROCK PERFORMER 2101 GM, 2181 FORD, 2176
CHRYSLER REQUIRED ON ALL ENGINES
EXHAUST
1. HEADERS OR CAST IRON EXHAUST MANIFOLDS ALLOWED
2. SINGLE EXHAUST PIPE FOR EACH SIDE OF ENGINE NO MERGE OR CROSSOVER
EXHAUST ALLOWED MUST RUN PAST DRIVER
CARBURETOR
1. ANY OEM STOCK CARBURETOR OR A HOLLEY (350) #7448 ALLOWED
2. NO MODIFICATIONS , STANDARD BOOSTERS REQUIRED A MAXIMUM 1 INCH
ALUMINUM SPACER WITH 1 OR 2 HOLES CENTERED IN SPACER STRAIGHT CUT
3. TWO GASKET MAXIMUM THICKNESS .065
4. A RESTRICTOR PLATE MAY BE REQUIRED TO EQUALIZE COMPETITION
AIR CLEANER AND AIR FILTER
1. ONLY APPROVED AIR CLEANERS ONLY . AN APPROVED COMPLETE DRY
ELEMENT MINIMUM 1 1/2” THICK MAXIMUM 4 INCH HIGH ELEMENT MUST BE
USED AT ALL TIMES ALL AIR WUST BE FILTERED THROUGH THIS ELEMENT TOP
OF AIR CLEANER MUST BE SOLID.AND NO HOLES NO COLD AIR BOXE OR COWL
INDUCTION . NO DUCTWORK OR BAFFLES ON OR LEADING TO CARB OR AIR
FILTER ELEMENT
IGNITION
1. ONLY OEM ELECTRONIC IGNITION ALLOWED ON ALL MODELS NO BOOSTERS
2. NO RACING COILS PERMITTED SUCH AS ACCELL , MSD ETC
3. DISTRIBUTOR CANNOT BE MODIFIED IN ANYWAY
FLYWHEEL AND CLUTCH ASSEMBLY
1. OEM STOCK CLUTCH AND FLYWHEEL ALLOWED , NO GRINDING OR LIGHTNING
ALLOWED, MINIMUM WEIGHT 35 LBS
TRANSMISSIONS
1. AUTOMATIC OR STANDARD CAST IRON 3 OR 4 SPEED TRANSMISSIONS
REAR ENDS
1. MAY BE INTERCHANGED BETWEEN MANUFACTURER MAY BE SPOOL OR
WELDED NO RATCHET OR LIMITED SLIP CHEVROLET IN FORD IS OK
2. REAR END MUST HAVE OEM STOCK HOOKUPS
SPRINGS
1. ALL CARS MUST COMPETE WITH TYPE SPRINGS FROM OEM. IF COIL MUST BE
COIL IF LEAF MUST BE LEAF
2. ADJUSTABLE REAR SPRING HANGERS AND COIL SPRINGS SPACERS ( NON
ADJUSTABLE) ALLOWED AFTERMARKET SPRINGS ALLOWED NO SCREW JACKS
SHOCKS
1. OEM STEEL SHOCKS REQUIRED MUST MOUNT IN ORIGNAL LOCATION NO TIE
DOWN SHOCKS 50/50.
FRAME RAILS
1. NO SHORTENING OR ALTERING IN ANYWAY
2. NO TUBING FRAME CONNECTORS ALLOWED
A FRAMES UPPER AND LOWER
1. OEM STOCK FOR MAKE AND MODEL
SWAY BAR
1. OEM AND MUST BE MOUNTED IN ORIGINAL LOCATION MAY BE ADJUSTABLE ON
ONE END
WHEELS
1. 10 INCH WHEELS MAX
TIRES
1. FMS HOOSIER SCUFFS
GAS
1. PUMP GAS OR SPEEDWAY GAS ONLY YOU MAY FILL UP AFTER RACE MAX 8
GALLONS
FUEL CELL
1. FUEL CELL RECOMENDED
2. ALL FUEL TANKS MUST VENT HIGH AND TO LEFT SIDE OF FRAME
STARTER
1. OEM STARTER
2.
3. ONLY ONE 12 VOLT BATTERY ALLOWED
RADIATOR
1. ANY COPPER OR ALUMINUM RADIATOR ALLOWED
2. ALL CARS MUST HAVE A RUBBER OVERFLOW HOSE TO RIGHT REAR OF CAR
ANGLED TOWARDS GROUND
BRAKES
1. OEM BRAKES NO REMOTE BRAKE ADJUSTERS ALLOWED
2. AFTERMARKET CLUTCH AND BRAKE PEDALS ALLOWED
BODIES
1. STOCK APPEARING OR SPEEDWAY APPROVED STEEL OR ALUMINUM ;PANELS
NO EXTENDED ¼’S
2. BODY MUST BE IN ORIGINAL LOCATION ON FRAME
3. HOOD, DOORS, ROOF MAYBE HULLED NO HOLE OR LOUVER IN HOOD OR
TRUNK
4. DASH MAYBE REMOVED
5. ALL GLASS EXCEPT WINDSHIELD AND ALL FLAMMABLE MATERIAL MUST BE
REMOVED
6. FRONT AND REAR INNER PANELS MAY BE REMOVED
7. DOORS MUST BE WELDED SHUT
8. MUST HAVE GRILL EXPANDED METAL OK WINDSHIELD EXPANDED METAL OK
9. ALL BODIES MUST BE CLOSED IN FRONT AND REAR WITH DOLID METAL METAL
AND PAINTED COLOR OF CAR
10. REAR VIEW MIRROR ALLOWED INSIDE CAR
11. MINIMUM 5 INCH GROUND CLEARANCE FRAME AND BODY
SPOILER
1. LEXAN OR ALUMINUM SPOILERS STOCK OEM OK, 5” SPOILERS MAX HIGH AND
WIDTH OF DECK LID MAX 60” WIDE
BUMPERS
1. AFTERMARKET STOCK APPEARING BUMPER COVERS ALLOWED
2. BRACING IS ALLOWED BEHIND BUMPER ONLY NOTHING ABOVE BUMPER OR
OUTSIDE OF GRILL
3. MUST HAVE WRECKER HOOK UPS FRONT AND REAR
ROLL BARS
1. MINIMUM THREE POINT ROLLCAGE
2. FULL ROLL CAGE RECOMMENDED BRS MAY GO THROUGH FRONT AND REAR
FIREWALL
3. ALL ROLL BAR WITHIN DRIVERS REACH MUST BE PADDED
WHEELBASE
1. WHEELBASE MUST BE STOCK FROM FACTORY AND MUST BE SAME ON BOTH
SIDES MINIMUM 102 INCHES
TREAD WIDTH
1. MAXIMUM TREAD WIDTH FRONT AND REAR IS 66” CHECKED AT CENTER OF
SPINDLES INSIDE TO OUTSIDE OF TIRE
SAFETY EQUIPMENT
1. ALL CARS MUST HAVE SEAT BELTS
2. ALL CARS MUST HAVE SHOULDER HARNESS
3. ALL CARS MUST HAVE SEAT BELTS FASTENED TO FRAME
4. ALL DRIVERS MUST WEAR A HELMET ANYTIME YOU ARE ON THE TRACK
5. ALL DRIVERS MUST WEAR FIRE RETARDANT DRIVING UNIFORM OR LONG
SLEEVE SHIRTS AND PANTS WHEN DRIVING RACE CAR
6. WINDOW NETS REQUIRED
ALL CARS MUST BE PAINTED AND LETTERED NUMBERS ON BOTH SIDES 18” HIGH
DIRECT ALL QUESTION TO Charlie at 843-209-4768 or Red Anderson at 843-870-6873.