CHANGES FOR 2010 ARE INDICATED IN
RED.
BODY:
GENERAL; THE ONLY APPROVED BODIES ARE 1990-2010; CHEVROLET LUMINA,
IMPALA, MONTE CARLO, PONTIAC GRAND PRIX, OLDSMOBILE CUTLASS, BUICK REGAL, DODGE
AVENGER, CHARGER & INTREPID, FORD FUSION, TAURUS & THUNDERBIRD. STEEL, ALUMINUM OR FIBERGLASS AFTERMARKET ARE
ALLOWED. PLASTIC FENDERS, ROOF & QUARTER PANELS ALLOWED. STOCK DIMENSIONS
ONLY. C PILLAR/QUARTER WINDOW MUST MEET REAR QUARTER, MUST BE “STOCK”
APPEARING. BODY MUST BE MOUNTED CENTER TO THE CHASSIS. REAR PANEL AND REAR
BUMPER COVER CANNOT HAVE ANY HOLES IN THEM. REAR BUMPER COVERS MUST BE UNCUT.
ALL BODY PARTS INCLUDING THE HOOD, ROOF AND TRUNK MUST MAINTAIN STOCK ANGLES.
NO “DIRT” OR “OUTLAW” STYLE BODIES OR BUMPER COVERS ALLOWED. NO STRAIGHT OR
SLAB SIDE BODIES. A “BELLY PAN” WILL BE ALLOWED FROM THE FRONT BUMPER TO THE
FRONT OF THE FRONT WHEEL OPENING ONLY AND MUST MAKE RIDE HEIGHT. NO OTHER UNDER
CAR AERODYNAMICS! ROCKER PANEL OR SIDE SKIRTS MAY NOT BE ROLLED UNDER. BODY
MUST MATCH MOTOR BEING USED. ANY BODY NOT MATCHING MOTOR, ADD 100 LBS TO
MINIMUM CAR WEIGHT. DOWNFORCE TYPE BODIES ARE NOT APPROVED FOR COMPETITION.
NO CARBON FIBER OR TITANIUM
ENGINE, POWER TRAIN, BODY OR CHASSIS PARTS!
MAXIMUM FRONT OVERHANG: 47” MEASURED FROM CENTER OF SPINDLE TO FRONT OF BUMPER.
MINIMUM ROOF HEIGHT: 45” MEASURED 10” BACK FROM TOP OF THE WINDSHIELD.
44” MEASURED 6” FORWARD OF THE TOP
LIP OF THE REAR WINDOW.
MINIMUM WINDSHIELD ANGLE: 23 DEGREES MEASURED
ANYWHERE IN THE CENTER OF THE WINDSHIELD.
MAXIMUM VENT WINDOW: 20” MEASURED FROM BASE OF A PILLAR. VENT WINDOW MAY NOT BE
TAPERED BACK - MUST GO STRAIGHT UP TO
PILLAR.
MAXIMUM B POST EXTENSION: 3” MEASURED FROM
CORNER OF BODY.
MAXIMUM DECK LID HEIGHT: 35” MEASURED AT TOP
OF REAR QUARTER/DECKLID.
MAXIMUM REAR OVERHANG: 52” MEASURED FROM
CENTER OF REAR AXLE TO END OF BUMPER.
REAR SPOILER: MUST BE MOUNTED ON
THE REAR OF THE TRUNK OR FOLLOW THE CONTOUR OF THE REAR PANEL. SPOILER CAN NOT
EXCEED THE CONTOUR OF THE BODY AT THE BASE. TOP EDGE OF THE SPOILER MAY ONLY
ANGLE REARWARDS A MAXIMUM OF ½”. NO SIDE GUSSETS, NO REAR VANES. SPOILER MUST
BE CLEAR POLYCARBONATE MATERIAL. ONLY THE BOTTOM 1” OF THE SPOILER MAY BE STEEL
OR ALUMINUM. NO DECALS ON THE SPOILER.
MAXIMUM REAR SPOILER: 6” HEIGHT BY 60”
LENGTH.
MAXIMUM SPOILER HEIGHT: 41” MEASURED FROM TOP OF SPOILER TO GROUND.
GLASS: FULL WINDSHIELD AND BACK GLASS. QUARTER GLASS AND VENT
WINDOW ALLOWED, CLEAR POLYCARBONATE MATERIAL ONLY. IF QUARTER/VENT GLASS IS NOT USED, WINDOW
OPENING MUST REMAIN OPEN.
BODY SPOILERS: ROOF AND REAR WINDOW
AIR DEFLECTORS ARE ALLOWED. A MAXIMUM OF 2 ALLOWED, MOUNTED PARALLEL OF EACH
OTHER WITH A MAXIMUM HEIGHT OF 1”. BODY SIDE SKIRTS ALLOWED BETWEEN WHEEL
OPENINGS. MUST FOLLOW CONTOUR OF BODY AND MAY NOT BE STEPPED OR ANGLED. SIDE
SKIRTS MUST MAKE RIDE HEIGHT.
NERF BARS: MAY BE USED BETWEEN
WHEEL OPENINGS AT HUB HEIGHT. BARS MUST BE
ROUND OR SQUARE TUBING, MAXIMUM 1” X .125” SKIN TIGHT TO THE BODY WITH NO SHARP EDGES,
ANGLES OR POINTS. NERF BAR ENDS MUST BE TAPERED AND CAPPED. CARRAGE TYPE BOLTS
MUST MOUNT INWARD. POLYCARBONATE RUB RAILS ARE ALLOWED.
INTERIOR SHEETMETAL: DRIVER MUST BE
SEPARATED FROM BOTH THE ENGINE AND TRUNK AREAS. FIREWALLS MUST BE WELDED. REAR
SHELF AND RIGHT FLOOR AREA MAY BE ALUMINUM. THE REMAINDER MUST BE STEEL,
MINIMUM 22 GAUGE. RIGHT SIDE INTERIOR TIN MUST SLOPE UPWARDS OR LAY FLAT ACROSS
FROM THE DRIVESHAFT TUNNEL TO RIGHT DOOR. NO SHEET METAL ENCLOSURES AROUND
DRIVER.
FRAME/CHASSIS:
MUST BE A PERIMETER FRAME. NO
OFFSET OR STRAIGHT RAIL FRAMES ALLOWED.
WHEELBASE: MINIMUM 104”.
FRONT SNOUT: SNOUT MAY BE OEM OR FABRICATED (MUST BE A TYPICAL TYPE
SNOUT USING A KICK-UP). FABRICATED FRAMES MUST BE MADE OF MINIMUM 2” X 3” X .083” STEEL BOX TUBING. FRONT FRAME MUST
BE
CENTERED
TO THE CENTER SECTION. LEFT AND RIGHT KICKOUTS MUST BE OF EQUAL DISTANCE.
REAR CLIP: FRAME RAILS FROM THE
FRONT CLIP TO THE REAR CLIP (CENTER SECTION) MUST BE MINIMUM 2” X 3” X .120”
STEEL BOX TUBING. REAR CLIP MUST BE MINIMUM 2” X 3” X .083” STEEL BOX TUBING.
THE REAR CLIP MUST BE CENTERED TO THE CENTER SECTION WITH NO OFFSET.
ROLLCAGE: THE FOLLOWING ARE ADDITIONAL REQUIREMENTS AND
CLARIFICATIONS FOR THE INSTALLATION OF THE ROLLBARS. 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, WITH NO OFFSETS. THE MAIN ROLL BAR
REFFERED TO AS #1 MUST BE MOUNTED
VERTICAL (90 DEGREES) TO THE CENTER SECTION OF THE CHASSIS WITH NO OFFSETS.
THIS MEANS BAR #1 MUST BE STRAIGHT UP. STRICTLY ENFORCED! A
WEIGHT PENALTY MAY BE PLACED ON ANY ROLLCAGE THAT IN THE OPINION OF THE
“OFFICIALS” IS SET TOO FAR BACK.
FUEL CELL CRASH BAR: A RE-ENFORCEMENT
BAR, MINIMUM 1 ½” X .083”, MUST EXTEND BELOW THE REAR FRAME SECTION BEHIND THE
FUEL CELL. THIS REINFORCEMNT BAR MUST BE AS WIDE AS THE REAR FRAME RAILS AND
EXTEND AS LOW AS THE BOTTOM OF THE FUEL CELL WITH TWO (2) VERTICAL UPRIGHTS
EVENLY SPACED BETWEEN THE FRAME RAILS AND ATTACHED TO THE REAR CROSS MEMBER.
TWO (2) SUPPORT BARS, ONE (1) LOCATED ON EACH CORNER, MUST ANGLE UPWARDS AND BE
WELDED TO THE REAR FRAME RAILS.
FUEL CELL HEIGHT: MINIMUM 6”.
BALLAST WEIGHT: ALL BALLAST WEIGHT MOUNTED TO THE OUTSIDE OF THE CENTER
SECTION OF THE FRAME MAY NOT EXCEED 6”. ALL BALLAST WEIGHT MOUNTED TO THE
OUTSIDE OF THE FRAME BEHIND THE REAR AXLE MAY NOT EXCEED 3”. MUST
BE IN SOLID BLOCK FORM OF NO LESS THAN 5 LBS BLOCKS. ALL WEIGHTS MUST BE
SECURELY ATTACHED TO THE CAR WITH A MINIMUM OF TWO (2) 7/16” BOLTS. BALLAST
WEIGHT IS NOT ALLOWED IN THE DRIVERS COMPARTMENT. ALL WEIGHT MUST BE PAINTED
WHITE AND CLEARLY MARKED (SLM-CAR#).
ANY CAR LOOSING BALLAST WEIGHT OR FOUND WITH UNMARKED WEIGHT IS SUBJECT TO A
FINE.
GROUND CLEARANCE: 3”.
CAR WEIGHT: MINIMUM 2850 LBS.,
MAXIMUM LEFT SIDE PERCENTAGE 56.0%.
CRATE
MOTOR MINIMUM 2700 LBS., MAXIMUM LEFT SIDE PERCENTAGE 56.0%.
SUSPENSION:
A-FRAME:
AFTERMARKET ALLOWED.
SPINDLE & HUB: AFTERMARKET
ALLOWED. SPINDLES MUST BE STEEL. SAFETY HUBS ARE HIGHLY RECOMMENDED. ULTRA
LIGHT WEIGHT HUBS ARE NOT ALLOWED.
WHEEL BEARINGS: ALL WHEEL BEARINGS
(FRONT & REAR), DIFFERENTIAL &
TRANSMISSION BEARINGS MUST BE OF STOCK OEM
DESIGN, EITHER ANGLE TYPE CONE,
STRAIGHT BARREL TYPE OR BALL BEARING. ALL BEARINGS INCLUDING THE ROLLERS
MUST BE MAGNETIC STEEL ONLY. WHEEL BEARINGS MUST BE ANGULAR TYPE CONE.
BRAKES: MUST BE OPERATIONAL ON ALL 4 WHEELS AT ALL TIMES. VALVES
OF ANY TYPE WILL NOT BE PERMITTED IN THE BRAKE LINES THAT WILL REDUCE OR CUT
OFF THE FLOW OF BRAKE FLUID TO A SINGLE WHEEL. STEEL ROTORS ONLY. DRILLED OR
SCALLOPED ROTORS ARE NOT ALLOWED.
STEERING: OEM BOX TYPE OR RACK AND PINION
ALLOWED.
SPRINGS & SHOCKS: CONVENTIONAL 5” COIL SPRINGS OR COIL OVERS ARE ALLOWED.
ONLY ONE SHOCK PER WHEEL. SHOCKS WITH EXTERNAL RESERVOIRS OR
REMOTE/ELECTRONICALLY CONTROLLED ARE NOT PERMITTED.
REAR SUSPENSION: 3 POINT, TORQUE
ABSORBERS, LEAF SPRING, TRUCK ARMS, AND SPRING RODS ARE ALLOWED.
WHEELS: STEEL WHEELS ONLY. MAXIMUM 10” WIDE.
VALVE STEMS: NO “BLEED OFF” TYPE
VALVE STEMS.
TREADWIDTH: MAXIMUM FRONT AND
REAR 80 1/2”.
TIRES:
TRACK TIRE RULE WILL BE IN EFFECT-ALSO SEE
GENERAL RULES. AMERICAN RACER 10”
SLICK. LEFT SIDE TIRE IS EC-83, 26.5/10 X 15. RIGHT SIDE TIRE IS EC-84, 27.0/10
X 15. TIRES MUST BE PURCHASED THROUGH TRACK VENDOR. THE USE OF TIRE
SOFTNER/CHEMICALS OF ANY TYPE IS NOT ALLOWED. NO LUBRICANTS OR DRESSINGS OF ANY
TYPE MAY BE APPLIED TO THE SIDEWALLS OF THE TIRES.
TIRE INVENTORY
PROGRAM:
THE TIRE INVENTORY WILL BE IN EFFECT THROUGHOUT THE
POINTS SEASON STARTING AT THE ICEBREAKER EVENT AND ENDING ON THE FINAL THURSDAY
NIGHT THUNDER EVENT.
1) TIRE BANK:
EACH DRIVER WILL HAVE A TIRE BANK CONSISTING OF ALL
TIRES PURCHASED FOR THEIR INVENTORY THROUGHOUT THE SEASON. THE TIRE BANK WILL
HAVE NO MAXIMUM LIMIT, HOWEVER DRIVERS WILL BE LIMITED ON THE NUMBER OF TIRES
THEY CAN ADD IN ON A WEEKLY BASIS. ONCE A TIRE IS PLACED INTO A DRIVERS INVENTORY IT IS
PERMANENTLY IN THEIR INVENTORY. TIRES ARE ALWAYS RECORDED TO THE REGISTERED
DRIVER, NOT THE CAR!
2) NEW TIRE SCHEDULE:
A) STARTING AT THE ICEBREAKER, DRIVERS WILL BE ELIGIBLE TO PURCHASE UP TO
TEN (10) TIRES FOR ICEBREAKER WEEKEND AND THE FIRST THURSDAY NIGHT THOMPSON
THUNDER OF THE SEASON. DIVISIONS RUNNING TWO FEATURES AT ICEBREAKER WILL
NOT RECEIVE ANY ADDITIONAL TIRES. DRIVERS MUST
START AND FINISH BOTH ICEBREAKER AND THE FIRST TNTT ON THEIR 10 INVENTORY
TIRES. ALL PIT ROAD SPARE TIRES MUST BE
FROM YOUR 10 INVENTORY TIRES. PRACTICE TIRES DO NOT HAVE TO BE FROM INVENTORY.
B) ON THE SECOND "THURSDAY NIGHT THUNDER"
AND CONTINUING THROUGHOUT THE SEASON, DRIVERS WILL BE ELIGIBLE TO PURCHASE TWO
(2) NEW TIRES TO ADD TO THEIR INVENTORY EACH WEEK. DRIVERS MUST START AND
FINISH BOTH THE HEAT AND FEATURE ON INVENTORY TIRES. IN THE EVENT OF A PUNCTURE
ALL SPARE TIRES MUST BE FROM WITHIN THE DRIVERS INVENTORY
3) RECORDING PROCEDURE:
NEW FOR 2010! DRIVERS ARE RESPONSIBLE TO BRING ALL NEW INVENTORY
TIRES TO THE SCALES/TECH AREA FOR PROPER RECORDING AND STENCILING. SCALES/TECH
AREA IS LOCATED NEXT TO THE TIRE & FUEL STATIONS. ALL NEW INVENTORY TIRES
MUST BE NEW STICKER TIRES AND RECORDED INTO INVENTORY PRIOR TO BEING
USED/PRACTICED. SCUFFS OR USED TIRES WILL BE REJECTED! IT IS THE RESPONSIBILITY OF THE DRIVER/OWNER
TO MAKE SURE THE TIRES ARE BROUGHT TO THE INVENTORY STATION FOR RECORDING PRIOR
TO THE START OF THE DRIVERS MEETING.
4) SPECIAL EVENTS:
ADDITIONAL TIRE PURCHASES MAY BE ADJUSTED FOR EXTRA
DISTANCE RACES INCLUDING DOUBLE FEATURES BY RACE OFFICIALS. COMPETITORS WILL BE
ADVISED OF ANY CHANGES.
5) NEW TIRE ELIGIBILITY:
DRIVERS MUST START THE FEATURE TO BE ELIGIBLE TO
PURCHASE TIRES THE FOLLOWING WEEK. IF A DRIVER ELECTS NOT TO PURCHASE TIRES,
THEY WILL FORFEIT TIRES FOR THAT WEEK AND WILL NOT BE ABLE TO PURCHASE MORE
THAN THE WEEKLY LIMIT THE FOLLOWING WEEK. NEW TIRES PURCHASED DO NOT HAVE TO BE
USED THE SAME WEEK THEY ARE PURCHASED. HOWEVER THEY MUST STILL BE INVENTORIED
TO BE INCLUDED IN YOUR BANK. ANY TEAM / DRIVER THAT BEGINS RACING AFTER THE
ICEBREAKER, WILL ONLY BE ELIGIBLE TO PURCHASE SIX (6) TIRES THEIR FIRST WEEK
AND TWO (2) TIRES EACH WEEK AFTER.
6) RUNNING INVENTORY
TIRES / PENALTIES:
DRIVERS ARE RESPONSIBLE TO HAVE INVENTORY TIRES ON THEIR CAR AT ALL TIMES DURING HEAT AND FEATURE EVENTS. PRACTICE TIRES DO NOT HAVE TO BE FROM WITHIN YOUR INVENTORY. TIRE SERIAL NUMBERS MUST MATCH WHAT WAS RECORDED FOR THAT DRIVER. ANY DRIVER CAUGHT WITH TIRES NOT FOUND IN THEIR INVENTORY OR TIRES THAT HAVE BEEN TAMPERED WITH IN ANY WAY INCLUDING UN-READABLE AND NON-TRACEABLE TIRES WILL BE DEEMED ILLEGAL. THIS WILL RESULT IN DISQUALIFICATION FROM THE RACE EVENT (INCLUDES HEAT RACES AND FEATURE EVENTS). IN ADDITION THE DRIVER WILL BE INELIGIBLE TO ADD ANY TIRES TO HIS INVENTORY FOR THE FOLLOWING INVENTORY EVENT. ALL ILLEGAL OR UN READABLE TIRES WILL BE CONFISCATED.
7) CUT, DAMAGED, MISSING,
TAKE-OFF TIRES:
DRIVERS WITH CUT, DAMAGED, OR MISSING TIRES WILL NOT
RECEIVE CREDITS FOR NEW REPLACEMENT TIRES. DRIVERS WILL BE RESPONSIBLE TO USE
TIRES WITHIN THEIR INVENTORY AS REPLACEMENTS. ONLY NEW TIRES ADDED THE SAME DAY
MAY BE REPLACED PRIOR TO THE HEATS DUE TO A CUT/PUNCTURE PER TECH OFFICIAL
APPROVAL.
DRIVERS MAY ELECT TO GIVE ONCE REGISTERED TIRES TO OTHER
TEAMS. HOWEVER THE RECEIVING TEAM MAY NOT BE IN THE TOP 10 IN POINTS. THE TIRES MUST BE USED
AND MAY NOT BE NEW OR SCUFFED CONDITION. TIRES CAN ONLY BE TRANSFERRED ONCE AND
REQUIRE PROPER NOTIFICATION FROM BOTH TEAMS TO THE TIRE OFFICIAL FOR APPROVAL
PRIOR TO BEING TRANSFERRED.
ENGINES:
GENERAL SPECS: MAXIMUM ENGINE SIZE
358 C.I.D. CAST IRON BLOCKS AND CYLINDER HEADS ONLY. THE BLOCK MUST RETAIN ALL
OEM SPECS WITH THE EXCEPTION OF CYLINDER OVERBORE AND SURFACING OF THE BLOCK
DECK. ANGLE CUTTING OF THE BLOCK DECK WILL NOT BE PERMITTED. PRESSURISED OIL MUST FLOW THROUGH THE ENGINE
NORMALLY. ALL OIL MUST RETURN TO THE PAN NORMALLY.
COMPRESSION: MAXIMUM
COMPRESSION IS 12.0:1, 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.
LOCATION: GENERAL MOTORS-THE FORWARD MOST
SPARK PLUG MUST BE EVEN WITH OR FORWARD OF THE CENTERLINE OF THE UPPER BALL
JOINTS. FORD AND CHRYSLER-THE RIGHT CYLINDER HEAD MUST BE EVEN WITH OR FORWARD
OF THE CENTERLINE OF THE UPPER BALL JOINTS. FORD CRATE MOTORS THAT ARE SET BACK
TO FRONT OF CYLINDER HEAD MUST ADD 10 LBS TO EACH FRAME RAIL-LOCATED FORWARD OF
UPPER BALL JOINT. ENGINE MUST BE LEVEL AS MEASURED FROM SIDE TO SIDE AND FRONT
TO BACK WITHIN ½”. MINIMUM CRANKSHAFT HEIGHT IS 10” MEASURED FROM THE
CENTERLINE OF THE CRANKSHAFT TO GROUND.
CRANKSHAFT: STEEL PRODUCTION
DESIGN ONLY. AFTERMARKET CRANKSHAFTS ALLOWED, BUT MUST BE SIMILAR IN APPEARANCE
AND CONSTRUCTION TO OEM CRANKSHAFT. MAXIMUM CRANKSHAFT STROKE IS CHEVROLET
3.500”, FORD 3.515”, CHRYSLER 3.500”. MINIMUM CRANKSHAFT WEIGHT IS 46 LBS..
MAIN JORNALS MAY NOT BE DRILLED.
OIL PAN & PUMP: WET SUMP ONLY. OIL
PUMP MUST BE IN THE PAN OR AN EXTERNAL BELT DRIVEN SINGLE STAGE PUMP. EXTERNAL
PUMPS MUST SCAVANGE FROM THE WET SUMP OIL PAN. PRESSURIZED OIL MUST FLOW & DRAIN NORMALLY THROUGH THE ENGINE,
NO ADDITIONAL PRESSURISED OR RETURN OIL LINES EXCEPT TO OIL COOLER IF USED. NO
EXTERNAL OIL TANKS OR ACCU-SUMP SYSTEMS ALLOWED. . EXTERNAL OIL COOLERS ARE
ALLOWED.
ENGINE OIL SPECIFICATIONS: THE USE OF
COMBUSTION ENHANCING OILS OR ADDITIVES IS NOT PERMITTED.
PISTONS:
3 RING FLAT TOP OR DISHED (REVERSE DOME)
ALUMINUM PISTONS ONLY. ALL 3 RINGS MUST BE OF MAGNETIC STEEL. VALVE RELIEFS MAY
BE CUT INTO THE PISTONS. NO PORTION OF THE PISTON MAY PROTRUDE ABOVE THE TOP OF
THE BLOCK.
RODS: STEEL CONNECTING RODS ONLY. NO STAINLESS STEEL, ALUMINUM,
OR TITANIUM CONNECTING RODS.
CAMSHAFT & LIFTERS: SOLID CAM AND
LIFTERS MAY BE USED. ROLLER ROCKERS ALLOWED. NO ROLLER LIFTERS. ANY TYPE OF
MECHANICAL ASSISTANCE EXERTING A FORCE TO ASSIST IN THE CLOSING OF THE LIFTER
AND/OR PUSHROD (REV KITS) ARE NOT ALLOWED.
CYLINDER HEADS: STOCK CAST IRON
PRODUCTION HEADS ONLY. AFTERMARKET HEADS ARE NOT PERMITTED. NO GRINDING,
POLISHING, BEADING, OR CHEMICAL (ACID) MILLING. NO PORT MATCHING OR FLOW WORK
OF ANY KIND. MAXIMUM VALVE SIZE 2.050”. NO TITANIUM VALVES. VALVE ANGLE NOT TO
EXCEED 2 DEGREES FROM STOCK. CHEVROLET MUST USE OEM CHEVROLET, OR BOWTIE. NO
DART, WORLD PRODUCTS OR VORTEC HEADS ALLOWED. FORD MUST USE OEM, OR CAST IRON
MOTORSPORTS HEADS. NEW FORD MOTORSPORTS HEADS PART # M-6049-N351 OR N352 MUST
USE INTAKE # M9424-C358 (PERFORMER # 2782). CHRYSLER MUST USE OEM, OR W-2
HEADS. CHEVROLET MAY USE DART IRON EAGLE S/S CYLINDER HEAD PART# 10024266. CHEVROLET MAY USE THE NEW SMALL PORT
BOWTIE/VORTEC CYLINDER HEAD PART # 25534421 WITH A MAXIMUM 2.00” INTAKE VALVE
& MAXIMUM 1.50” EXHAUST VALVE, MUST USE 7101 OR 7116 INTAKE. ALL CAST LINES & INSIGNIA’S MUST BE
CLEARLY VISIBLE & COMPLETE.
VALVE JOB: 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. UPON COMPLETION OF THE VALVE
JOB, THE BOWL AREA UNDER THE VALVE SEAT DOWN TO THE BOTTOM OF THE VALVE GUIDE
MUST STILL BE THE SAME CONFIGURATION AS FAR AS SHAPE AND FINISH AS IT WAS FROM
THE MANUFACTURER. SURFACES 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.
INTAKE MANIFOLD: EDELBROCK PERFORMER
SERIES ARE THE ONLY INTAKES ALLOWED. THE INTAKE MANIFOLD MUST REMAIN AS
MANUFACTURED “STOCK OUT OF THE BOX”. MANIFOLDS MUST REMAIN UNALTERED, INCLUDING
BOLTHOLES. PAINTING OR COATING OF THE
INTAKE IS NOT ALLOWED. ONLY CURRENT DESIGNED INTAKES ALLOWED. OLDER DESIGN
INTAKES WITH CURRENT PART NUMBERS ARE NOT PERMITTED. APPROVED PART NUMBERS ARE,
CHEVROLET 2101, 7101 (PERFORMER RPM), FORD 2181, 2665, 2750, 2782, AND CHRYSLER
2176 (WITH STOCK OEM HEAD). CHRYSLER USING W-2 HEADS MUST USE MOPAR PERFORMANCE
# P5249572AB (THIS NUMBER APPEARS ON THE INTAKE MANIFOLD AND IS TO BE USED TO
ORDER THIS PART).
CARB SPACER: ONE SOLID MATERIAL
SPACER, MAXIMUM HEIGHT OF 1” PERMITTED. NO WEDGE SHAPE SPACERS ALLOWED. BOTH
THE TOP & BOTTOM SURFACES MUST BE PARALLEL. PORTHOLE (S) MUST BE VERTICAL
TO THE TOP AND BOTTOM. NO BEVELING, TAPERING, FLARING, OR RADIUSING OF PORTHOLE(S).
SPACER MAY NOT BE STEPPED OR UNDERCUT. NO ADDITIONAL OPENINGS FOR THE INDUCTION
OF AIR ALLOWED. ONLY ONE .075” MAX GASKET PER SIDE OF SPACER ALLOWED.
CRATE
MOTOR MUST USE MOROSO SPACER PART# 64930.
CARBURETOR: THE HOLLEY R4412 OR
KEITH DORTON SERIES # 0-80583-1 ARE THE ONLY CARBURETOR’S ALLOWED. 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.
ADJUSTABLE (JETTED) AIR BLEEDS ALLOWED IN MAIN BODY BEHIND METERING BLOCK. IDLE
HOLES MAY BE DRILLED IN BUTTERFLIES. THROTTLE PLATE SCREWS MAY BE TRIMMED FLUSH
WITH SHAFT. NO OTHER CHANGES ARE
ALLOWED. NO RESHAPING, POLISHING, GRINDING OR DRILLING OR CHEMICAL TREATING
ALLOWED. GASKETS MUST REMAIN UNALTERED.
CRATE MOTOR MUST USE HOLLEY 600 4 BBL CARBUERATOR, PART#
0-80540-1, MUST REMAIN AS PURCHASED THROUGH HOLLEY (INCLUDED IN ENGINE
PACKAGE). THE ONLY ITEMS THAT ARE ALLOWED TO BE CHANGED ARE THE JETS, POWER
VALVE AND ACCELORATOR PUMP CAM. ABSOLUTELY NO OTHER CHANGES OR
MODIFICATIONS ALLOWED! A TRACK SUPPLIED STOCK HOLLEY CARBURETOR MUST MATCH YOUR
CARBURETOR EXACTLY, INCLUDING FINISH.
AIR CLEANER/FILTER: ONLY A ROUND DRY
PAPER MAXIMUM 4” AIR FILTER ELEMENT
ALLOWED. AIR FILTER MAY NOT BE SPRAYED OR SOAKED WITH CHEMICALS. AIR CLEANER
MUST HAVE A METAL TOP. THE K & N PLASTIC TOP OR FILTER TOP IS NOT ALLOWED.
ALL AIR CLEANERS ARE SUBJECT TO TRACK APPROVAL.
EXHAUST SYSTEM: HEADERS MUST BOLT
DIRECTLY TO CYLINDER HEADS. EXHAUST PIPES MUST EXIT 6” PAST DRIVERS SEAT. BOTH
PIPES MAY EXIT THE SAME SIDE OF CAR, BUT MUST EXIT UNDER CAR. PIPES MAY NOT
EXIT OUT THE SIDE OF CAR.
IGNITION: ELECTRONIC DISTRIBUTORS MUST BE
GEAR DRIVEN, USE AN EIGHT LOBE CAM WITH MAGNETIC PICK-UP, STOCK TYPE HOUSING
MOUNTED IN STOCK LOCATION, USING FACTORY PRODUCTION FIRING ORDER ONLY. GM &
CHRYSLER MUST USE 1-8-4-3-6-5-7-2 & FORD MUST USE 1-3-7-2-6-5-4-8. THE FOLLOWING
WILL NOT BE PERMITTED; ADJUSTABLE TIMING CONTROLS, IGNITION DELAY/TIMING RETARD
DEVICES, EXTERNAL RPM LIMITERS, ANY ACCESSORIES THAT REGULATE THE POWER SUPPLY.
THE FOLLOWING SYSTEMS ARE NOT PERMITTED; COMPUTERIZED, MULTI-COIL,
DISTRIBUTORLESS, CRANK TRIGGERED OR MAGNETO SYSTEMS. THE ONLY MSD IGNITION BOX
ALLOWED IS THE 6AL BOX WITH 6 WIRE CONNECTOR.
SPARK PLUGS: SPARK PLUG MUST
MATCH TYPE OF HEAD BEING USED. GASKET TYPE HEAD MUST USE GASKET SEAT SPARK
PLUG. TAPERED TYPE HEAD MUST USED TAPERED SEAT SPARK PLUG.
ENGINE COOLING SYSTEM: RADIATORS MUST
REMAIN IN STOCK LOCATION. ALL CARS MUST BE EQUIPPED WITH A MINIMUM ONE (1)
GALLON OVERFLOW CONTAINER. ONLY WATER CAN BE USED AS AN ENGINE COOLANT. THE
ONLY APPROVED COOLANT ADDITIVE ALLOWED IS “WATER WETTER”.
WATERPUMP: STOCK OEM MECHANICAL
TYPE ONLY. MUST BE BELT DRIVEN. ALUMINUM
PUMPS ALLOWED.
ALTERNATOR: MUST BE MOUNTED
& BELT DRIVEN OFF THE FRONT OF THE ENGINE.
FUEL PUMP: ONE MECHANICAL ONLY.
MUST BE IN STOCK LOCATION.
FUEL:
SEE RULE
20J-15, 20J-16. ADDITIVES OF ANY
TYPE OR CATALYSTS ARE NOT ALLOWED. NO COOLING OR ICING OF THE FUEL. THE USE OF
UNLEADED FUEL IS NOT PERMITTED. FUEL MUST PASS A CHEMICAL TEST.
THE
FOLLOWING FUELS ARE THE ONLY FUELS APPROVED FOR COMPETITION:
SUNOCO;
STARDARD, SUPREME
POWER
MIST; TWS, T112
ROCKET
BRAND; 111
TURBO
BLUE; TURBO BLUE LEADED
VP; C12
CRATE
MOTORS MUST USE SUNOCO STANDARD ONLY.
PARTS PACKAGE INCLUDES; HOLLEY
600 CFM CARBURETOR, CARBURETOR PLATE, TIMING COVER & BOLT KIT, DAMPER,
ROCKER STUDS, WASHERS, DISTRIBUTOR GEAR, OIL FILTER ADAPTOR, FUEL PUMP ROD,
FUEL PUMP PLATE, SPARK PLUG WIRES, FUEL PUMP, FUEL LINE CARBURETOR, FUEL LINE
CARBURETOR TO FUEL PUMP, OIL PAN GASKET, OIL FILTER & OIL.
ENGINE WILL BE SEALED PRIOR TO
PICK-UP.
AUTHORIZED
SERVICE CENTERS;
NAT’S RACING ENGINES, 702 WARREN AVE, SWANSEA, MA
02777, PHONE 508-336-4142
NAT CHIVIATONE IS AVAILABLE AT
THE TRACK FOR ANY TECHNICAL ASSISTANCE THAT MAY BE NEEDED BY THE RACER.
THOMPSON SPEEDWAY RESERVES THE
RIGHT TO CONFISCATE ANY ENGINE FOR TESTING, SUPPLYING THE COMPETITOR WITH A
MOTOR, IF AVAILABLE, UNTIL TESTING IS COMPLETE. ANY ENGINE FOUND TO BE
ALTERED/TAMPERED WITH, WILL RESULT IN LOSS OF ENGINE & ALL EARNED POINTS.
DRIVETRAIN:
BELL HOUSING: ANY NASCAR APPROVED SAFETY BELL HOUSING. MUST BE A FULLY
ENCLOSED BELL HOUSING.
CLUTCH & FLYWHEEL: MUST USE A CONVENTIONAL
STYLE CLUTCH. HI-PERFORMANCE MINIMUM 5.5” SUPER CLUTCHES ALLOWED. ALUMINUM
FLYWHEELS ALLOWED. NO CARBON FIBER OR TITANIUM CLUTCH PARTS INCLUDING
FASTENERS.
TRANSMISSION: MUST BE OEM 3 OR 4
SPEED. NO SPECIAL PRODUCTION, NO OVERDRIVES, NO 5 SPEEDS, NO AUTOMATICS
ALLOWED. 1ST GEAR MAY BE REMOVED. ONLY OEM STEEL ANGLE CUT FORWARD
GEARS ARE PERMITTED. SQUARE CUT FORWARD GEARS ARE NOT PERMITTED. STOCK OEM GEAR
RATIOS ONLY. NO WELDED GEARS ALLOWED. GUN DRILL TRANSMISSION SHAFTS WILL NOT BE
PERMITTED. ALL GEARS MUST BE IN WORKING ORDER FROM INSIDE THE DRIVERS
COMPARTMENT WITH MECHANICAL LINKAGE. THERMAL COATINGS ARE NOT ALLOWED.
DRIVESHAFT: STEEL OR ALUMINUM
ALLOWED.
REAR END ASSEMBLY: QUICK CHANGE
ALLOWED. ONLY A LOCKED SPOOL DIFFERENTIAL ALLOWED. AXLE SHAFTS AND AXLE TUBES
MUST BE MAGNETIC STEEL. RIGHT AXLE TUBE CANNOT BE MORE THAN 2” LONGER THAN THE
LEFT. REAR MUST BE CENTERED IN THE CHASSIS WITHIN ½” OF CHASSIS CENTERLINE. NO
INDEPENDENT REARS. QUICK CHANGE & NON-QUICK CHANGE (STRAIGHT) REAR ENDS
MUST USE A 10” RING GEAR. THERMAL COATINGS ARE NOT ALLOWED. FOR THE PURPOSE OF
CHECKING A PRE-DETERMINED FINAL DRIVE GEAR RATIO, WHEN JACKED UP BOTH REAR
WHEELS MUST ROTATE IN THE SAME DIRECTION WITH EACH TRAVELING THE SAME
ROTATIONAL DISTANCE.
GEAR RULE: MINIMUM 4.56:1 –
MAXIMUM 5.04:1 FOR QUICK CHANGE. MINIMUM 4.56:1 – MAXIMUM 4.86:1 FOR STRAIGHT
REAR.
CRATE
MOTOR: MINIMUM 4.30:1 – MAXIMUM 4.42:1
ADJUSTING DEVICES:
THE ONLY ADJUSTING DEVICE IN
THE DRIVERS COMPARTMENT WILL BE FOR BRAKE PROPORTIONING (FRONT TO REAR ONLY).
NO OTHER DEVICES OF ANY KIND TO CONTROL OR ALTER THE HANDLING, WEIGHT
PERCENTAGE, RIDE HEIGHT AND ETC. OF THE CAR.
ADDITIONAL INFORMATION:
SUPER
LATE MODELS MUST ALSO COMPLY WITH THOMPSON INTERNATIONAL SPEEDWAY
GENERAL/SAFETY RULES.
THOMPSON
INTERNATIONAL SPEEDWAY RESERVES THE RIGHT TO CONFISCATE FROM THE RACE WINNER
ANY/OR ALL OF THE FOLLOWING ITEMS; INTAKE MANIFOLD, IGNITION BOX AND/OR MODULE,
DISTRIBUTOR, TACHOMETER, ECT.. 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 BOX/MODULE, PRIOR TO ANY RACING EVENT, OR DURING POST RACE
INSPECTIONS, CONFISCATING THEIR PARTS. FAILURE TO COMPLY WILL RESULT IN THE
LOSS OF ALL EARNED POINTS AND/OR SUSPENSION.