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THOMPSON
INTERNATIONAL SPEEDWAY
2004
LTD.
SPORTSMAN RULES
DRIVER ELIGIBILITY IS THE DECISION OF SPEEDWAY OFFICIALS.
GENERAL:
MINIMUM 108” REAR WHEEL DRIVE CARS. NO CONVERTIBLES, STATION
WAGONS OR MUSTANGS. FORD & CHRYSLER; 1968 - 1978 CARS
WITH A 108” OR LONGER
WHEELBASE, BUT MAY BE SHORTENED TO 108” WHEELBASE BY CUTTING
THE CENTER SECTION OF THE FRAME RAILS EQUALLY ON BOTH SIDES.
GENERAL MOTORS; MUST USE A 1978 OR NEWER METRIC G BODY AND
FRAME. ALL PARTS
IN A STREET STOCK MUST BE
FROM 1968-1987 TO BE ELIGIBLE FOR USE, UNLESS
OTHERWISE NOTED IN THESE RULES. STOCK OEM STEEL OR
APPROVED AFTERMARKET (PANELS) BODIES (FIBERGLASS HOOD
ALLOWED), CENTERED ON THE CHASSIS IN ORIGINAL POSITION. ALL
BODY PARTS, STOCK DIMENSIONS ONLY. NO LOWERING, CHOPPING, OR
CHANNELING OF ANY BODY PARTS. APPROVED
FRONT AND REAR AFTERMARKET
BUMPER COVERS ALLOWED. NO HOLES IN REAR BUMPER COVER OR
REAR BODY PANEL.
BODY:
MUST BE STOCK FOR FRAME BEING USED. BODY MUST RETAIN ALL
FACTORY LISTED DIMENSIONS, LINES AND ANGLES.
HOOD MAY BE FIBERGLASS, MUST LAY FLAT AT STOCK ANGLE
WITH NO REAR OPENING. HOOD MUST BE SECURED IN THE FRONT WITH 3
HOOD PINS.
THE ONLY APPROVED
AFTERMARKET STEEL BODY PANELS (FENDERS, DOORS & QUARTER
PANELS) ARE FOR THE CHEVROLET MALIBU, MONTE CARLO &
BUICK REGAL AT
THIS TIME. MUST BE STEEL STOCK APPEARING TYPE
PANELS, AVAILABLE THROUGH FIVE-STAR OR RAYLINE.
MINIMUM
FRONT FENDER HEIGHT: 29” MEASURED FROM TOP FRONT
INSIDE EDGE OF FENDER TO GROUND.
MINIMUM
ROOF HEIGHT: 50” MEASURED 10” BACK FROM THE
WINDSHIELD. 50” MEASURED 6” FROM THE TOP OF THE REAR
WINDOW.
GLASS:
FULL WINDSHIELD. QUARTER WINDOWS ALLOWED.
MINIMUM
WINDSHIELD ANGLE: 30
DEGREES, MEASURED ANYWHERE IN THE CENTER OF THE WINDSHIELD.
VENT
WINDOWS:
NOT ALLOWED. WINDOW OPENINGS MUST REMAIN STOCK.
MINIMUM
REAR OVERHANG: 40”
MEASURED FROM THE CENTER OF THE REAR AXLE TO THE END OF THE
REAR BUMPER.
BODY
SPOILERS: SIDE SKIRTS ALLOWED BETWEEN WHEEL OPENINGS.
MUST FOLLOW CONTOUR OF BODY AND MAY NOT BE STEPPED OR ANGLED.
SIDE SKIRTS MUST MAKE RIDE HEIGHT.
INTERIOR
SHEETMETAL: DRIVER MUST BE SEPARATED FROM THE ENGINE
AND THE TRUNK AREA. FIREWALLS MUST BE WELDED. THE FRONT
FIREWALL MUST BE IN STOCK LOCATION. NO FOOT BOXES. THE REAR
FIREWALL MUST REMAIN AT STOCK ANGLE
BETWEEN WHEEL WELLS. A FULL STOCK APPEARING FLOOR PAN MUST BE
USED. A FILLER PANEL MUST BE USED BETWEEN THE FIREWALL (ROLL
CAGE UPRIGHT) TO THE RIGHT DOOR. THIS PANEL MUST BE STRAIGHT
TO THE FRAME RAIL (NO BENDS OR CURVES). ALL INTERIOR
SHEETMETAL MUST BE MINIMUM .031.
" STEEL
FRAME/CHASSIS:
MUST BE STOCK OEM. NO REPOSITIONING, ELONGATING, OR
OVERSIZING OF ANY MOUNTING HOLES IN THE FRAME.
2” X 3”X .083” MAGNETIC STEEL TUBING MAY BE USED
TO REPLACE THE FRAME RAILS FROM THE REAR SPRING POCKET, TO THE
REAR BUMPER. TUBING MUST FOLLOW STOCK DIMENSIONS OF THE FRAME
BEING USED. TUBING MUST MAINTAIN A MINIMUM GROUND CLEARANCE OF
11”. UNIBODY CARS MUST CONNECT SUB FRAMES WITH MINIMUM 2”
X 3” X .120” MAGNETIC STEEL TUBING. THE
CENTER SECTION OF THE FRAME MAY BE “X”.
BUMPERS:
ALL BUMPERS MUST BE
STANDARD FOR THE MAKE AND MODEL CAR. BUMPERS MUST BE
WELDED TO THE FRAME SUPPORT TO PREVENT THEM FROM FALLING OFF.
BUMPER ENDS MUST BE CAPPED TO THE FENDERS OR QUARTERS TO
PREVENT HOOKING. TUBULAR
BUMPERS WILL BE ALLOWED WITH THE USE OF AN AFTERMARKET
(RUBBER) FRONT & REAR BUMPER COVERS. THE BUMPER
SUPPORTS MUST BE INSIDE THE COVER AND MAY NOT EXTEND PAST THE
FLAT SURFACE OF THE TIRE. THE ONLY APPROVED BUMPER COVERS ARE
THE EARLY STYLE CHEVROLET MONTE CARLO, OLDSMOBILE CUTLASS,
BUICK REGAL AND PONTIAC GRAND PRIX. FORD
MAY USE THE 1988 THUNDERBIRD. CHRYSLER PRODUCTS MAY USE THE
AVENGER .
FUEL
CELL HEIGHT: MINIMUM 10”.
BALLAST WEIGHT:
MUST BE MOUNTED BETWEEN THE INSIDE EDGES OF THE FRAME RAILS
AND CAN NOT BE LOWER THAN THE BOTTOM EDGE OF THE FRAME.
GROUND
CLEARANCE
5”.
CAR WEIGHT:
MINIMUM 3100 LBS.. MAXIMUM LEFT SIDE PERCENTAGE 53.0%.
ROLLCAGE: THE FOLLOWING ARE ADDITIONAL
REQUIREMENTS AND CLARIFICATIONS FOR THE INSTALLATION OF THE
ROLL BARS. NO
PLATING OF THE FRAME. THE MINIMUM DISTANCE FROM THE TOP OF THE
ROLL CAGE TO THE TOP OF THE FRAME RAILS MUST BE 38”. THE
MINIMUM DISTANCE FROM THE TOP OF THE FRAME TO THE DASH BAR,
TOP DOOR BARS, AND THE CROSS-BAR BEHIND THE DRIVERS SEAT WILL
BE 21”. THE FRONT OF THE FRONT LEGS (REFERRED TO AS BAR #2A
& #2B) CAN NOT BE FURTHER
BACK THAN 38” FROM THE CENTERLINE OF THE FRONT LOWER BALL
JOINTS. NO PART OF THE MAIN ROLL BAR (REFERRED TO AS #1) MAY
BE MORE THAN 83 ½” REARWARD FROM THE CENTERLINE OF THE
FRONT LOWER BALL JOINTS. THE MAIN ROLL BAR MUST BE MOUNTED
VERTICAL (90 DEGREES) ON THE CENTER SECTION OF THE FRAME WITH
NO OFFSET. THIS BAR MUST BE CENTERED TO THE CHASSIS.
THE ROOF BAR (REFERRED TO AS #3) MUST BE WITHIN 4”
OF THE SIDE WINDOW AND/OR
DOOR OPENINGS ON BOTH SIDES, AS WELL AS THE FRONT
WINDSHIELD.
POSITIVELY NO OFFSET ROLL CAGES!!!!
SUSPENSION:
A-FRAMES: UPPER & LOWER MUST REMAIN
STOCK OEM & UNALTERED. . A-FRAMES MAY NOT BE CHANGED FROM
SIDE TO SIDE. LOWER BALL JOINTS MAY
BE REPLACED WITH “PRESSED IN” STOCK TYPE EXTENDED LOWER
BALL JOINTS IN STOCK POSITION. NO “SCREW IN” OR “MONO”
BALL JOINTS ALLOWED. UPPER BALL JOINTS MUST BE STOCK OEM. NO
OFFSET UPPER CONTROL ARM SHAFTS. UPPER A-FRAME BOLTS MAY BE
REPLACED FOR ADDED CAMBER. UPPER & LOWER A-FRAME BUSHINGS
MAY BE REPLACED WITH POLYURETHANE BUSHINGS, BUT HOLE LOCATION
MAY NOT BE ALTERED.
SWAY BAR: FRONT MUST BE STOCK OEM OR
OEM STOCK REPLACEMENT. LINK PINS MAY BE REPLACED WITH
THREADED ROD. NO REAR SWAY BAR ALLOWED.
SPINDLE/HUB:
SPINDLE MAY BE CHANGED TO HEAVY DUTY OEM UNITS. THEY MUST BE
BOLT ON UNITS AND NOT BE ALTERED IN ANY WAY.
THE ONLY MODIFICATION ALLOWED TO THE SPINDLE WILL BE FOR LOWER
BALL JOINT INSTALLATION, LOWER BALL JOINT HOLE MAY BE REAMED
OR TAPERED TO FIT THE LOWER BALL JOINT PIN. TREAD WIDTH
MUST REMAIN STOCK. TRACK SUPPLIED SPINDLES MUST FIT YOUR CAR.
NO ALUMINUM SPINDLES. HUB/ROTOR MUST BE STOCK OEM.
BRAKES: STOCK
OEM HYDRAULIC SYSTEMS. ALL
4 BRAKES MUST BE IN WORKING ORDER. DISC BRAKES ALLOWED IN
FRONT ONLY. NO ALUMINUM BRAKE DRUMS. NO DRILLING OR LIGHTENING
OF ANY BRAKE PARTS INCLUDING BACKING PLATES, SHOES AND PADS.
AFTERMARKET MASTER CYLINDERS/ PEDALS ARE ALLOWED.
ADJUSTABLE PROPORTIONING VALVES ALLOWED.
STEERING: STOCK
OEM STEERING LINKAGE AND STEERING BOX. STEERING SHAFT MAY BE
REMOVED FROM COLUMN AND SECURELY REINSTALLED WITH HEIM JOINTS.
COIL SPRINGS:
FRONT AND REAR STEEL RACING SPRINGS ALLOWED. MINIMUM 5”
DIAMETER. FRONT SPRINGS MAY USE SPRING SPACERS AND ADJUSTING
CUPS. SPRING POCKET MUST REMAIN STOCK OEM. REAR JACKING BOLTS
ALLOWED. THE ONLY SPRING POCKET MODIFICATION ALLOWED IS FOR
THE INSTALLATION OF JACKING BOLT.
LEAF SPRINGS:
STEEL LEAF SPRINGS ONLY. LEAFS MAY BE ADDED ON BOTH SIDES. ALL
LEAFS MUST BE THE SAME WIDTH. STOCK APPEARING ADJUSTABLE
SHACKLES AND LOWERING BLOCKS ALLOWED. NO OTHER MODIFICATIONS
ALLOWED.
TRAILING ARMS: MUST BE STOCK FOR THE
YEAR, MAKE AND MODEL. LOWER
TRAILING ARMS MUST BE STOCK OEM AND UNALTERED. UPPER TRAILING
ARMS MUST BE WITHIN 1” OF STOCK LENGTH. MOUNTING HOLES AND
LOCATIONS MUST REMAIN STOCK OEM.
SHOCKS: FRONT AND REAR SHOCKS MUST BE A
MATCHED PAIR, LEFT TO RIGHT. SHOCKS MUST REMAIN IN STOCK
LOCATION. REAR SHOCKS MAY BE
PLACED ON TOP OF FRAME IN ORIGINAL POSITION (MUST USE
ORIGINAL MOUNTING HOLES) WITH A 1.5” MAXIMUM SPACER. LISTED
BELOW ARE THE ONLY APPROVED SHOCKS FOR GM CARS.
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BRAND
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FRONT
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REAR
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KYB
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KG-4513
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KG-5548
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NAPA MONROE
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5840
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5802
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MONROE SSF SERIES
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N/A
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12475-6-7-8
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MONROE SENSATRAC
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5840
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5802
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DOETSCH
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0101
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0102
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SUMMIT
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SUM G7551
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SUM G7552
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PRO SHOCK
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SS-100
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SS-201
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FOR NON GM CARS, YOU MUST USE THE SAME SERIES
SHOCKS FROM THE ABOVE LIST. ANY GM SHOCKS NOT LISTED HERE MUST
BE APPROVED IN WRITING TO BE ALLOWED IN COMPETITION.
WHEELS: ALL 4 WHEELS MUST BE HEAVY DUTY
AFTERMARKET STEEL WHEELS. A WHITE SPOKE WAGON WHEEL, OR THE
EQUIVALENT IS RECOMMENDED. ALL WHEELS MUST BE 15” X 7”.
MINIMUM WHEEL WEIGHT IS 20 LBS.. 1” LUG NUTS ARE
MANDATORY.1/2” STUDS HIGHLY RECOMMENDED.
WHEEL OFFSET: WILL BE MEASURED AS
FOLLOWS; THE INSIDE SURFACE OF THE WHEEL FLANGE (MOUNTING
SURFACE) MUST BE IN THE CENTER OF THE WHEEL AS DETERMINED BY
MEASURING FROM THE OUTSIDE BEAD SEAT TO OUTSIDE BEAD SEAT. A
TOLERANCE OF +/- ¼” WILL BE ALLOWED.
WHEEL SPACERS: ¼” SPACER MAY BE USED
ON THE LEFT REAR ONLY. ½” SPACER MAY BE USED ON THE RIGHT
REAR ONLY. IF A WHEEL SPACER IS USED, THEN A HEAVY DUTY AXLE
AND ½” STUDS MUST BE USED.
TIRES: AMERICAN RACER ROADSTAR SIZES
225/70 X 15 OR 235/70 X 15. LEFT SIDE TIRE IS 705 COMPOUND.
RIGHT SIDE TIRE IS 706 COMPOUND. 706 COMPOUND MAY BE USED ON
LEFT SIDE.
ENGINE:
GENERAL REQUIREMENTS:
ENGINES: MUST BE STOCK OEM V8
PRODUCTION CAST IRON BLOCK AND HEADS. THE ONLY APPROVED
ENGINES ARE: CHEVROLET- 350, FORD–351W, 351C, CHRYSLER-340
& 360.
THE ENGINE BLOCK MUST RETAIN ALL OEM SPECS
WITH THE EXCEPTION OF THE CYLINDER OVERBORE AND SURFACING OF
THE BLOCK DECK. ANGLE CUTTING OF THE BLOCK DECK WILL NOT BE
PERMITTED.
ORIGINAL BORE AND STROKE MUST BE MAINTAINED.
CYLINDERS MAY BE BORED A MAXIMUM OF .040”
FROM STANDARD SIZE. AFTERMARKET OEM
TYPE MAGNETIC STEEL MAIN BEARING CAPS ALLOWED. MUST BE STOCK
APPEARING. NO SPLADE CAPS ALLOWED.
ENGINE LOCATION: MUST BE IN STOCK
LOCATION, CENTERED IN THE CHASSIS. STEEL REPLACEMENT MOTOR
MOUNTS ALLOWED. MINIMUM CRANKSHAFT HEIGHT 13 ½” MEASURED
FROM THE CENTERLINE OF THE CRANKSHAFT TO GROUND.
COMPRESSION:
MAXIMUM COMPRESSION
IS 9.5:1. FORD
MAXIMUM COMPRESSION IS 10.0:1. COMPRESSION IS CHECKED WITH THE
“WHISTLER”. NO TOLERANCE ALLOWED ON MAXIMUM COMPRESSION.
THE 2 MOST FORWARD BOLTS ON BOTH SIDES OF THE INTAKE
MUST BE DRILLED TO ACCEPT A SEAL.
CRANKSHAFT:
ONLY STOCK PRODUCTION OEM CRANKSHAFTS ALLOWED. CHEVROLET MUST
USE LARGE JOURNAL CRANK. REGRINDING OF THE ROD & MAIN
JOURNALS TO A MAXIMUM OF .030” UNDER STANDARD SIZE ALLOWED.
THE MAXIMUM ALLOWABLE STROKE TOLERANCE IS +/- .015”. MAXIMUM
STROKE ON A CHEVROLET WILL BE 3.495”. THE ROD JOURNALS MAY
BE DRILLED TO OBTAIN THE MINIMUM CRANKSHAFT WEIGHT. NO
MACHINING, POLISHING, GRINDING OR ANY OTHER MODIFICATIONS TO
ANY PART OF THE CRANKSHAFT ALLOWED. CRANKSHAFT MUST REMAIN AS
MANUFACTURED. ONLY NORMAL OEM TYPE ENGINE BALANCING ALLOWED.
MINIMUM CRANKSHAFT WEIGHT IS 50 LBS.. CHRYSLER & FORD
MINIMUM CRANKSHAFT WEIGHT IS 54 LBS.
HARMONIC
BALANCER: STOCK OEM OR
EXACT REPLACEMENT ONLY.
PISTONS & RODS:
ANY 3-RING ALUMINUM
PISTON ALLOWED. ALL 3 RINGS MUST BE OF MAGNETIC STEEL.
NO PART OF THE PISTON MAY PROTRUDE ABOVE THE TOP OF THE BLOCK.
ANY STEEL PISTON RINGS ALLOWED. STOCK OEM OR “SPORTSMAN”
TYPE SOLID STEEL CONNECTING RODS MUST
BE USED. NO
MODIFICATIONS ALLOWED. AFTERMARKET ROD BOLTS ARE ALLOWED.
STOCK ROD LENGTH ONLY! MINIMUM WEIGHT
FOR PISTON, PIN, RINGS, BEARING & ROD ASSEMBLY IS 1075
GRAMS.
OIL PANS: AFTERMARKET ALLOWED,
BUT MUST BE STEEL AND KEEP STOCK APPEARANCE. APPROVED
AFTERMARKET PANS FOR CHEVROLET ARE MOROSO PART # 21804, 21807,
21808 OR CANTON PART # 11-200, 11-200M, 11-200T.
A STOCK OIL PAN MAY BE MODIFIED TO MOROSO OR CANTON
SPECIFICATIONS.
TIMING CHAIN: ANY TIMING CHAIN AND
GEARS ALLOWED. GEAR DRIVE OR BELT DRIVE TYPES NOT ALLOWED.
DEGREE BUTTONS AND OFFSET CRANK KEYS OK.
CYLINDER HEADS: STOCK OEM CAST IRON
HEADS ONLY. CHEVROLET MAY USE AFTERMARKET “WORLD PRODUCT
S/R” (STOCK REPLACEMENT) SERIES HEADS,
BARE CASTING PART# 043600B AND PART# 043610B.
FORD CLEVELAND MUST USE 2 BBL HEADS ONLY. FORD
WINDSOR MAY USE THE CAST IRON “WORLD PRODUCTS WINDSOR JR”
CYLINDER HEAD, BARE CASTING PART# 05303B WITH 1.94” INTAKE
VALVE AND 1.60” EXHAUST VALVE.
HEAD STUDS ARE
NOT ALLOWED. ALL CHEVROLET HEADS MUST BE FACTORY LISTED FOR 70
CC’S OR GREATER. HEADS MAY NOT BE ANGLED MILLED. LISTED
BELOW ARE THE MAXIMUM
VALVE SIZE ALLOWED
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MAX
INTAKE
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MAX
EXHAUSE
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CHEVROLET
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1.94"
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1.50"
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FORD WINDSOR
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1.94"
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1.60"
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FORD CLEVELAND
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2.09"
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1.71"
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CHRYSLER 340
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2.02"
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1.60"
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CHRYSLER 360
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1.88"
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1.60"
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VALVES:
MUST BE STOCK OR DIRECT REPLACEMENT. STAINLESS STEEL ALLOWED.
NO “PRO FLO”, TULIP, ULTRA LITE OR TITANIUM VALVES
ALLOWED.
VALVE SPRINGS:
MAXIMUM OUTSIDE DIAMETER OF 1.55”. DOUBLE SPRINGS ALLOWED.
STEEL RETAINERS ONLY.
VALVE JOB:
MULTI ANGLE VALVE JOBS ARE PERMITTED. WHEN CUTTING THE VALVE
SEAT ANGLES, NO STONE OR GRINDING MARKS ARE PERMITTED ABOVE
THE BOTTOM OF THE VALVE GUIDE. ALL CUTTING IN REFERENCE TO THE
VALVE JOB AND BOWL AREA MUST BE CENTERED OFF THE CENTERLINE OF
THE VALVE GUIDE. ON THE BOWL SIDE OF THE INTAKE AND EXHAUST
SEATS, THE MAXIMUM ANGLE OF CUTTING AND/OR GRINDING WILL BE 90
DEGREES. UPON COMPLETION OF THE VALVE JOB, THE BOWL AREA UNDER
THE VALVE SEAT DOWN TO THE VALVE GUIDE MUST STILL BE THE SAME
CONFIGURATION AS FAR AS SHAPE AND FINISH AS IT WAS FROM THE
MANUFACTURER. SURFACE AND/OR EDGES WHERE THE CUTTER OR STONE
HAS TOUCHED MUST NOT BE POLISHED. HAND GRINDING OR POLISHING
WILL NOT BE PERMITTED ON ANY PART OF THE HEAD. NO WORK ALLOWED
IN THE COMBUSTION CHAMBER, IT MUST REAMAIN AS CAST FROM THE
MANUFACTURER.
CAMSHAFT: HYDRAULIC CAMS ONLY. NO
ROLLER CAMS OR LIFTERS ALLOWED.
THE MAXIMUM VALVE LIFT WILL BE AS FOLLOWS:
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INTAKE
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EXHAUST
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CHEVROLET
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.390
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.410
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FORD WINDSOR
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.427
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.465
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FORD CLEVELAND
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.461
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.463
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CHRYSLER
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.429
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.444
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CAMSHAFT LIFT MAY BE MEASURED AT THE VALVE ROCKER ARM,
OR DIRECTLY ON THE CAMSHAFT. CAM LIFT MAY NOT EXCEED GROSS
VALVE LIFT DIVIDED BY OEM LISTED ROCKER ARM RATIO. TOLERANCE
FOR CAMSHAFTS WILL BE + .005” .
LIFTERS: STOCK DIAMETER LIFTERS ONLY.
NO RHODES OR OTHER VARIABLE DURATION LIFTERS. HYDRAULIC
LIFTERS MUST BE OPERATIVE AND PASS A LEAK DOWN TEST. A MAXIMUM
OF 2 LIFTER BORE SLEEVES (BUSHINGS) WILL BE ALLOWED FOR BLOCK
REPAIR.
ROCKER ARMS: STOCK ROCKERS OR
AFTERMARKET ROLLER ROCKERS ALLOWED. MUST MAINTAIN STOCK RATIO.
GUIDE PLATES ALLOWED.
EXHAUST
MANIFOLDS: IRON
EXHAUST MANIFOLDS ONLY. CHEVROLET MUST USE “LOG TYPE”
MANIFOLDS. NO CHEVY II, TRUCK TYPE, T/A, RAM HORN, OR IROC
TYPE MANIFOLDS. NO DOWN DRAFT TYPE MANIFOLDS. MAXIMUM EXHAUST
MANIFOLD OUTLET DIAMETER FOR CHEVY IS 1/7/8”. CHEVY MUST USE
OVER THE TOP OF THE SPARK PLUG TYPE MANIFOLD ON THE RIGHT SIDE
OF THE CAR (PASSENGER SIDE). MAXIMUM EXHAUST PIPE DIAMETER IS
2 ½”. EXHAUST PIPES MUST EXIT 6”
BEHIND THE DRIVERS SEAT AND UNDER
THE CAR.
BOTH PIPES MAY MAY
BE LOCATED ON THE SAME SIDE
OF CAR. NO
CROSSOVER OR H PIPES ALLOWED. PIPES MUST MAINTAIN AT
LEAST 1” (ONE INCH) SEPARATION.
MUFFLERS:
MANDATORY! SEE GENERAL RULES.
INTAKE MANIFOLD: EDELBROCK PERFORMER
SERIES ARE THE ONLY INTAKES ALLOWED. THE INTAKE MUST REMAIN AS
MANUFACTURED “STOCK OUT OF THE BOX”. MANIFOLDS MUST REMAIN
UNALTERED, INCLUDING BOLT HOLES. PAINTING OR COATING OF THE
INTAKE IS NOT ALLOWED. ONLY CURRENT DESIGNED INTAKES ALLOWED.
OLDER DESIGN INTAKES WITH CURRENT PART NUMBERS ARE NOT
ALLOWED. APPROVED PART NUMBERS ARE: CHEVROLET 2101, FORD
2181,2665,2750, CHRYSLER 7176.
A TRACK SUPPLIED INTAKE MUST FIT YOUR ENGINE INCLUDING
GASKETS.
CARBURETOR: THE HOLLEY R4412 IS THE
ONLY CARBURETOR ALLOWED. THE CARBURETOR MUST BE “STOCK OUT
OF THE BOX”. ALL CARBURETORS MUST PASS TRACK GAUGES. THE
ONLY CHANGES THAT WILL BE ALLOWED ARE AS FOLLOWS; THE CHOKE
PLATE AND SHAFT MAY BE REMOVED, JETS, POWER VALVE, ACCELERATOR
PUMP CAM AND ACCELERATOR PUMP DISCHARGE NOZZLES MAY BE
CHANGED. IDLE HOLES MAY BE DRILLED IN THE THROTTLE PLATES. THROTTLE
PLATE SCREWS MAY BE TRIMMED FLUSH WITH SHAFT. NO OTHER CHANGES
ARE ALLOWED. NO RESHAPING, POLISHING, GRINDING, UNDERCUTTING
OR DRILLING ALLOWED. NO ADJUSTABLE (JETTED) AIR BLEEDS
OR CIRCUITS. GASKETS MUST REMAIN UNALTERED. NO “HP” PARTS
ALLOWED. FORDS
MAY USE KEITH DORTON SERIES # 0-80583-1 CARBURETOR. MUST
REMAIN “STOCK OUT OF THE BOX”.
AIR CLEANER/FILTER:
FUEL:
MUST BE PETROLEUM BASED OR SYNTHETIC AUTOMOTIVE GASOLINE ONLY.
GASOLINE SHALL NOT BE BLENDED WITH ALCOHOL, ETHERS OR OTHER
OXYGENATES, PROPYLENE OXIDE, ANILINE OR ITS DERIVATIVES,
NITRO-COMPOUNDS OR NITROGEN CONTAINING COMPOUNDS. NO ADDITIVES
THAT ENHANCE HORSEPOWER! THE USE OF STOCK-UNLEADED FUEL SOLD
AT LOCAL GASOLINE STATIONS IS ALLOWED. FUEL WILL BE TESTED.
IGNITION: STOCK OEM POINT OR HEI
DISTRIBUTORS ALLOWED. NO AFTERMARKET DISTRIBUTORS ALLOWED.
STOCK COILS ONLY. GM MUST HAVE THE COIL IN THE CAP. NO MSD OR
SUPER COIL-TYPE COILS. THE ONLY AFTERMARKET PART ALLOWED IN OR
ON THE COMPLETE DISTRIBUTOR WILL BE ADVANCE SPRINGS.
BATTERY: BATTERY MUST BE PLACED IN THE
FIREWALL, WHERE THE HEATER CORE WAS LOCATED. THE BATTERY MUST
BE FLUSH WITH THE FORWARD MOST PART OF THE STOCK FIREWALL AND
MAY NOT PASS THE CENTERLINE OF THE CHASSIS. THE BATTERY MUST
BE COMPLETELY SEALED FROM THE DRIVERS COMPARTMENT.
WATER PUMPS: STOCK OEM ONLY. CHEVY MUST
USE STOCK STEEL WATER PUMP. NO CHEVY ALUMINUM OR AFTERMARKET.
RADIATOR FAN: ELECTRIC ALLOWED.
FUEL PUMP: ONE MECHANICAL IN STOCK
LOCATION.
DRIVETRAIN:
BELLHOUSING: COMMERCIALLY MANUFACTURED
ALL STEEL FULLY ENCLOSED BLOW SHIELD.
CLUTCH & FLYWHEEL: CLUTCH AND
PRESSURE PLATE MUST BE STOCK OEM STEEL. NO MODIFICATIONS OF
ANY KIND ALLOWED. MINIMUM DIAMETER FOR THE CLUTCH AND PRESSURE
PLATE IS 10.4”. ANY STEEL FLYWHEEL FOR MAKE AND MODEL OF CAR
MAY BE USED, IT MUST HAVE COME WITH A 10.4” OR LARGER CLUTCH
AND PRESSURE PLATE. MINIMUM
WEIGHTS WILL BE; FLYWHEEL 20LBS., PRESSURE PLATE 13 LBS.,
CLUTCH DISC 4 LBS. PRESSURE PLATE MUST BE STEEL, AND CLUTCH
DISC MUST HAVE SPRINGS. FORD FLYWHEEL MUST BE STEEL, HAVE AN
OEM PART NUMBER AND WEIGH 20.0 LBS., CLUTCH AND PRESSURE PLATE
MUST BE OEM STEEL. MINIMUM DIAMETER IS 10.0”. CLUTCH MUST
HAVE SPRINGS. MINIMUM TOTAL WEIGHT FOR CLUTCH AND PRESSURE
PLATE IS 17.0 LBS.
AUTOMATIC TRANSMISSION: MUST BE OEM
STOCK. SHIFT KITS, AND REMOTE OIL COOLERS ALLOWED. NO HIGH
STALL CONVERTERS. NO DEEP OIL PANS OR ANY OTHER MODIFICATIONS
ALLOWED. THE ONLY APPROVED TRANSMISSIONS ARE; GM-TH350,
CHRYSLER-904 OR 727, AND FORD-C4 OR C6.
STANDARD TRANSMISSION: STOCK OEM 3 OR 4
SPEED. ALL GEARS MUST BE IN WORKING ORDER. ALL INTERNAL PARTS
MUST BE STOCK . STOCK OEM GEAR RATIOS
ONLY. NO MACHINING, DRILLING,
WELDING OR LIGHTENING OF ANY PARTS. HIGH GEAR MUST HAVE
A 1:1 RATIO AND NO OTHER GEARS MAY HAVE A RATIO CLOSER THAN 1:35
TO 1. NO OVERDRIVE OR SPECIAL PRODUCTION TRANSMISSIONS. NO
ALUMINUM CASE TRANSMISSIONS ALLOWED. AFTERMARKET STOCK TYPE
SHIFTERS ALLOWED.
DRIVESHAFT: STOCK OEM STEEL ONLY,
INCLUDING LENGTH.
REAR ENDS: MUST BE STOCK OEM. STOCK
TREAD WIDTH MUST BE MAINTAINED. THE FOLLOWING IS NOT ALLOWED;
LOCKED REAR, WELDING OF SPIDER GEARS, POSI REARS, LIMITED
SLIP, DETROIT LOCKERS, SHIMMING OF SPIDER GEARS, OR ANY OTHER
MODIFICATION THAT LOCKS THE REAR WHILE UNDER THE LOAD OF BEING
TURNED BY THE DRIVE TRAIN.
GM CARS MUST USE A 7 ½” REAR END ASSEMBLY.
MAXIMUM GEAR RATIO 4.56:1. RING AND PINION GEARS MAY BE
CHANGED. AFTERMARKET GEARS ALLOWED, BUT MUST BE STEEL AND THE
SAME DESIGN AND APPEARANCE AS OEM.
AXLE SHAFTS: SOLID STEEL AFTERMARKET
AXLES ARE ALLOWED. AXLES MUST RETAIN ALL STOCK DIMENSIONS.
C-CLIP ELIMINATOR ALLOWED.
ADDITIONAL INFORMATION:
LIMITED
SPORTSMAN MUST ALSO COMPLY WITH THOMPSON INTERNATIONAL
SPEEDWAY SAFETY/GENERALS RULES.
IF YOU COME UP WITH A RARE PART THAT WE CANNOT
FIND LISTED FOR PASSENGER CAR USE, THE BURDEN OF PROOF IS ON
YOU. THOMPSON INTERNATIONAL SPEEDWAY RESERVES THE RIGHT TO
CONFISCATE FROM THE FEATURE WINNER ANY/OR ALL OF THE FOLLOWING
ITEMS; INTAKE MANIFOLD, IGNITION MODULE, DISTRIBUTOR,
TACHOMETER, ETC. THE COMPETITOR WILL RECEIVE EITHER NEW PARTS
OR MONETARY COMPENSATION FOR ANY AND ALL CONFISCATED PARTS.
THOMPSON INTERNATIONAL SPEEDWAY ALSO RESERVES
THE RIGHT TO ISSUE A “STOCK OUT OF THE BOX” INTAKE
MANIFOLD AND/OR IGNITION MODULE, PRIOR TO ANY RACING EVENT, OR
DURING POST RACE INSPECTION, CONFISCATING THEIR PARTS. FAILURE
TO COMPLY WILL RESULT IN THE LOSS OF ALL EARNED POINTS AND
SUSPENSION.
TECH
QUESTIONS CONTACT MIKE KUN AT MSK630@AOL.COM
Sources:
Russ Dowd/Thompson International Speedway PR
Posted: November 27, 2003
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