BODY:

GENERAL: 1978 & NEWER AMERICAN CARS WITH A 108” WHEELBASE. OEM STOCK OR AFTERMARKET STEEL, ALUMINUM OR FIBERGLASS BODIES ALLOWED. PLASTIC FENDERS & QUARTER PANELS ALLOWED. STOCK DIMENSIONS ONLY. NO “DIRT” OR “OUTLAW” BODIES OR BUMPER COVERS ALLOWED. NO STRAIGHT OR SLAB SIDE BODIES. NO OFFSET BODIES. REAR QUARTER WINDOW PANEL(C PILLAR) MUST MEET QUARTER PANEL. NO SHELVES. BODIES MUST BE CENTERED ON THE FRAME. HOOD MUST LAY FLAT WITH NO REAR OPENING. THE FRONT & REAR BUMPER COVERS MUST MATCH BODY BEING USED. REAR BUMPER COVER/TAIL PANEL MUST REMAIN UNCUT AND MAY NOT HAVE ANY HOLES. IF AFTERMARKET BUMPER COVERS ARE USED, BUMPER TUBING MUST BE INSIDE OF COVER AND MAY NOT EXTEND PAST THE FLAT SURFACE OF THE TIRE. NO LOWERING, CHOPPING, OR CHANNELING OF ANY BODY PARTS. NO “BELLY PANS” OR ANY UNDER CAR AERODYNAMICS ALLOWED. ROCKER PANEL OR SIDE SKIRTS MAY NOT BE ROLLED UNDER. BODY MUST MATCH MOTOR BEING USED. LISTED BELOW ARE THE ONLY APPROVED AFTERMARKET BODIES;

BUICK REGAL, OLDS CUTLASS, PONTIAC GRAND PRIX, CHEVY MONTE CARLO, CHEVY LUMINA, FORD TAURUS, FORD T-BIRD, CHRYSLER LEBARON, DODGE AVENGER, DODGE INTREPID.

NO CARBON FIBER OR TITANIUM ENGINE, POWER TRAIN, BODY OR CHASSIS PARTS!

MAXIMUM FRONT OVERHANG: 45” MEASURED FROM THE CENTER OF THE SPINDLE TO FRONT OF BUMPER.

MINIMUM ROOF HEIGHT: 46” MEASURED 10” BACK FROM TOP OF THE WINDSHIELD. 46” MEASURED 6” FROM THE TOP OF THE REAR WINDOW.

MINIMUM WINDSHIELD ANGLE: 25 DEGREES MEASURED ANYWHERE IN THE CENTER OF THE WINDSHIELD.

MAXIMUM VENT WINDOW: 10” MEASURED FROM THE BASE OF THE A PILLAR. VENT WINDOW MAY NOT BE TAPERRED 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/DECK LID.

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: 5” HEIGHT BY 60” LENGTH.

MAXIMUM SPOILER HEIGHT: 40” MEASURED FROM TOP OF SPOILER TO GROUND.

GLASS: FULL WINDSHIELD AND BACK GLASS. QUARTER GLASS AND VENT WINDOWS ALLOWED, CLEAR POLYCARBONATE MATERIAL ONLY. IF QUARTER/VENT GLASS IS NOT USED, WINDOW OPENING MUST REMAIN OPEN. NO DECALS ON BACK GLASS.

BODY SPOILER: 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.

INTERIOR SHEETMETAL: FIREWALLS MUST BE WELDED. THE FRONT FIREWALL CANNOT BE FURTHER BACK THAN THE CENTERLINE BETWEEN THE FRONT UPRIGHT LEGS OF THE ROLL CAGE. A FOOTBOX MAY 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). THE REAR FIREWALL CANNOT BE FURTHER FORWARD THAN THE CENTERLINE OF THE MAIN HOOP BAR OF THE ROLL CAGE. A FULL STOCK APPEARING FLOOR MUST BE USED. RIGHT SIDE FLOOR MAY RUN LEVEL ACROSS FROM THE TUNNEL TO THE RIGHT DOOR PANEL. ALL INTERIOR SHEETMETAL MUST BE .031” STEEL.

FRAME/CHASSIS:

MUST BE A PERIMETER FRAME. NO OFFSET OR STRAIGHT RAIL FRAMES ALLOWED.

G-METRIC CHASSIS CARS WILL BE ALLOWED TO CLIP TUBE SNOUTS. CENTER SECTION AND REAR CLIP MAY BE OEM STOCK OR MUST CONFORM TO THE TUBULAR SECTION OF THE RULES.

WHEELBASE: 108”.

FRONT SNOUTS: MAY BE OEM OR FABRICATED.

OEM SNOUTS: STOCK FRONT SUB-FRAME BEGINNING A MINIMUM OF 22 INCHES REARWARD OF THE CENTERLINE OF THE FRONT SPINDLES AND EXTENDING FORWARD TO IN FRONT OF THE RADIATOR MUST REMAIN STOCK OEM. THE ONLY MODIFICATIONS PERMITTED ARE FOR SPRING BUCKET/JACKING BOLT, UPPER A-FRAME PERCH AND THE BOTTOM OF THE CROSS MEMBER MAY BE CUT FOR OIL PAN, HEADER & FUEL PUMP CLEARANCE. THE CROSS MEMBER MUST NOT BE MOVED FROM ITS ORIGINAL LOCATION. A MAXIMUM DISTANCE OF 25” MUST BE MAINTAINED FROM THE LEADING EDGE OF THE CENTER SECTION KICKOUT TO THE CENTERLINE OF THE FRONT CROSS MEMBER. STOCK OEM OR AFTERMARKET LOWER CONTROL ARMS. NO REPOSITIONING, ELONGATING OR OVERSIZING OF ANY MOUNTING HOLES. THE FOLLOWING ARE THE ONLY APPROVED OEM SNOUTS:

GM: G-METRIC & CAMARO

FORD: 79 AND NEWER FULLSIZE LTD, CROWN VIC. FORD MAY ALSO USE G-METRIC OR CAMARO.

CHRYSLER: 79 AND NEWER FULL SIZE. CHRYSLER MAY ALSO USE A G-METRIC OR CAMARO.

TUBULAR SNOUT:

GM-TYPE FRONT STEER TUBULAR FRONT SUB-FRAME MUST BE CONSTRUCTED USING 2” X 4” MAGNETIC STEEL TUBING WITH A MINIMUM .083” WALL THICKNESS. ALL FRONT STEER ASSEMBLIES MUST MAINTAIN A DIMENSION OF 32” FROM THE CENTER OF THE LEFT SIDE RAIL TO THE CENTER OF THE RIGHT SIDE RAIL AT ANY POINT FROM THE FRAME SIDE RAIL KICK OUTS EXTENDING FORWARD IN FRONT OF THE STEERING ASSEMBLY. THE FRONT FRAME EXTENTIONS USING 2” X 3” MINIMUM .083” MAGNETIC STEEL TUBING MAY BE WELDED TO THE END OF THE SUB-FRAME BUT SHOULD ANGLE DOWN A MAXIMUM OF 18 DEGREES. THE FRONT SUB-FRAME MUST BE ATTACHED IN THE CENTER OF THE FRAME AT THE FRAME SIDE RAIL KICK OUTS AND EXTEND FORWARD A LENGTH OF 16” ON ONE SIDE WITH THE OPPOSITE SIDE NO MORE THAN 1 INCH DIFFERENCE AND ANGLE UPWARD AT BETWEEN 22 AND 25 DEGREES. AT THIS POINT, A PIECE OF TUBING 27 INCHES LONG MUST BE WELDED AND EXTENDED STRAIGHT FORWARD IN FRONT OF THE STEERING ASSEMBLY. A DISTANCE OF 25” MUST BE MAINTAINED FROM THE LEADING EDGE OF THE KICKOUT TO THE CENTERLINE OF THE FRONT CROSS MEMBER. THE FRONT CROSS MEMBER MUST BE CONSTRUCTED USING 2” X 3” MINIMUM .083” MAGNETIC STEEL TUBING. THE MOUNTING POINTS FOR THE LOWER A-FRAMES MUST BE 14 ¼” AT THE REAR AND 8 ¾” ON THE FRONT, MEASURED FROM THE CENTERLINE OF THE SUB-FRAME TO THE CENTERLINE OF THE MOUNTING HOLE. WHEN MEASURING EITHER THE LEFT OR RIGHT SIDE, THE DISTANCE FROM THE CENTERLINE OF THE BOTTOM BALL JOINT TO THE CENTERLINE OF THE SUB-FRAME MUST BE EQUAL.

CENTER SECTION: THE CENTER SECTION OF THE CHASSIS MUST BE CONSTRUCTED WITH MINIMUM 2” X 3” X .120” MAGNETIC STEEL TUBING. THE WIDTH OF THE SIDE RAILS MUST BE A MAXIMUM OF 60” MEASURED FROM OUTSIDE OF RAIL TO OUTSIDE OF RAIL. BOTH RAILS MUST BE OF EQUAL LENGTH AND CENTERED.

REAR CLIP: THE REAR SECTION MUST BE CONSTRUCTED WITH MINIMUM 2” X 3” X .083” MAGNETIC STEEL TUBING. THE REAR SECTION MUST BE CENTERED TO THE CENTER SECTION OF THE CHASSIS. THE REAR RAILS MUST BOTH MAINTAIN THE SAME ANGLES AND MUST BE SYMETRICAL IN DESIGN. THE RAILS MUST GO OVER THE REAR END ASSEMBLY AND MUST MAINTAIN A MINIMUM GROUND CLEARANCE OF 10” AFTER THE REAR END. A REINFORCEMENT BAR (CRASH BAR), MINIMUM 1 ½” DIAMETER, .083” THICKNESS, MUST EXTEND BELOW THE REAR FRAME SECTION BEHIND THE FUEL CELL. THIS REINFORCEMENT BAR MUST BE AS WIDE AS THE FRAME RAILS AND EXTEND AS LOW AS THE BOTTOM OF THE FUEL CELL WITH 2 VERTICAL UPRIGHTS EVENLY SPACED IN BETWEEN THE FRAME RAILS AND ATTACHED TO THE REAR REINFORCEMENT BAR. TWO (2) SUPPORT BARS, ONE (1) LOCATED ON EACH CORNER, MUST ANGLE UPWARDS AND BE WELDED TO THE FRAME RAILS.

ROLL CAGE: THE FOLLOWING ARE ADDITIONAL REQUIREMENTS AND CLARIFICATIONS FOR THE INSTALLATION OF THE ROLL BARS. THE MAIN ROLL BAR REFERRED TO AS #1 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 CENTER OF THE TOP OF THIS BAR MUST BE NO LOWER THAN 36 ½” FROM THE TOP OF THE FRAME RAIL. LOCATION OF THE MAIN BAR IS A MAXIMUM OF 85 ½” AS MEASURED FROM THE CENTERLINE OF THE LOWER BALL JOINT TO THE CENTERLINE OF THE MAIN BAR. 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 CENTER OF THE FRONT UPRIGHT LEGS REFERRED TO AS #2A AND #2B CAN NOT BE FURTHER BACK THAN 39” FROM THE CENTER OF THE LOWER BALL JOINTS. POSITIVELY NO OFFSET ROLL CAGES !!!

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: 8” MINIMUM.

BALLAST WEIGHT: ALL BALLAST WEIGHT MOUNTED TO THE OUTSIDE OF THE FRAME MAY NOT EXCEED 3” FROM THE FRAME. 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 (LM-CAR#). ANY CAR LOOSING BALLAST WEIGHT OR FOUND WITH UNMARKED WEIGHT IS SUBJECT TO A FINE.

GROUND CLEARANCE: 4”

CAR WEIGHT: TUBE CHASSIS MINIMUM 2975 LBS., G-METRIC, FORD STOCK CHASSIS MINIMUM 2925 LBS., STOCK SNOUTS MINIMUM 2950 LBS., MAXIMUM LEFT SIDE PERCENTAGE 56.0%. MOPARS WITH ENGINES OVER 359 CUBIC INCH DISPLACEMENT MUST ADD 6.8 POUNDS PER CUBIC INCH OVER 359.

SUSPENSION:

A-FRAMES: UPPER AND LOWER CONTROL ARMS MAY BE AFTERMARKET OR OEM. AFTERMARKET UPPER A-FRAME MUST HAVE A CROSS-SHAFT. CROSS SHAFT MAY BE ALUMINUM OR STEEL. NO ADJUSTABLE TUBE TYPE CONTROL ARMS. LOWER CONTROL ARMS MUST MOUNT IN STOCK POSITION & MUST BE THE SAME LENGTH LEFT TO RIGHT. CONTROL ARMS MUST BE MAGNETIC STEEL. BALL JOINTS MAY BE CHANGED, BUT MUST REMAIN IN ORIGINAL POSITION. LOWER OEM CONTROL ARMS MUST REMAIN COMPLETE AS MANUFACTURED, BUSHINGS MAY BE CHANGED BUT CANNOT BE OFFSET TYPE.

SPINDLE & HUBS: AFTERMARKET OR OEM STEEL SPINDLES. SPINDLES MUST HAVE A STOCK PIN. SPINDLES MUST MATCH LEFT TO RIGHT WITH NO OFFSET, INCLUDING HEIGHT AND INCLINATION. STOCK TYPE STEEL ROTORS AND HUBS MUST BE USED. ROTOR/HUB ADAPTORS MUST BE STEEL. NO WIDE FIVE OR G.N. HUBS.

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.

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 STOP THE FLOW OF BRAKE FLUID TO A SINGLE WHEEL. DISC BRAKES ALLOWED, FRONT AND REAR. STOCK OR AFTERMARKET PIN TYPE SINGLE PISTON CALIPERS. FRONT STEEL STOCK TYPE ROTOR & HUB ALLOWED. REAR ROTORS MUST BE MINIMUM .810” X 11” STEEL AND USE A STEEL HAT. AFTERMARKET MASTER CYLINDER (S) AND PEDALS ALLOWED. OEM MASTER CYLINDER MUST BE A DUAL RESERVOIR TYPE. ADJUSTABLE PROPORTIONING VALVE MAY BE USED. NO DRILLING OR LIGHTENING OF DRUMS, ROTORS OR CALIPERS. AIR DUCTS ALLOWED TO COOL BRAKE ROTORS.

STEERING: STOCK OEM STEERING, AND STEERING BOX FOR CHASSIS BEING USED. NO RACK & PINION STEERING. HEIM JOINTS MAY BE USED AT THE INNER & OUTER TIE ROD ENDS. CENTER LINK MUST BE STEEL AND STOCK APPEARING. COLLAPSIBLE STEERING SHAFT IS RECOMMENDED. IF COLLAPSIBLE STEERING SHAFT IS NOT USED, THEN THE SHAFT MUST BE MADE WITH AT LEAST 2 U-JOINTS AND INSTALLED SO THAT UPON A HEAVY FRONT END COLLISION THE SHAFT WILL DEFLECT TO THE SIDE.

SPRINGS & SHOCKS: STOCK TYPE STEEL MINIMUM 5” SPRINGS MOUNTED IN ORIGINAL OEM LOCATION. IF LEAF SPRINGS ARE USED, ALL LEAFS MUST BE STEEL AND THE SAME WIDTH. NO HELPER SPRINGS OR TRACTION BARS. REAR SPRINGS MUST BE CENTERED OVER THE REAR END AND EQUALLY SPACED FROM CHASSIS CENTERLINE. CENTERLINE OF THE SPRING MAY NOT EXCEED THE CENTERLINE OF THE FRAME RAILS. ONLY ONE (1) STEEL OR ALUMINUM BODIED SHOCK PER WHEEL. SHOCKS (INCLUDING ENDS), MAY NOT EXCEED RACERS NET PRICE OF $165.00 PER SHOCK ASSEMBLY. REAR SHOCKS MUST MOUNT IN STOCK LOCATION. NO ADJUSTABLE, LOAD LEVELER, OFF ROAD, AIR TYPE OR SHOCKS WITH EXTERNAL RESERVOIRS OR REMOTE/ELECTRONICALLY CONTROLLED SHOCKS ALLOWED. NO COIL OVER ELIMINATORS.

REAR SUSPENSION: TRAILING ARMS MAY USE HEIM JOINTS. MAXIMUM LENGTH OF ARM MEASURED FROM CENTER TO CENTER OF MOUNTING HOLES, NOT TO EXCEED 25”. STOCK TRAILING ARMS MAY USE AFTERMARKET BUSHINGS, HOLES MAY NOT BE OFFSET. 3 LINK REAR, THE UPPER LINK MAY USE HEIM JOINTS OR RUBBER BUSHINGS. NO HORIZONTAL SPRINGS OR ANY OTHER TORQUE ABSORBING DEVICES. THE CENTER OF THE FORWARD MOUNTING POINT CAN BE NO FURTHER FORWARD THAN 13” FROM THE VERTICAL CENTERLINE OF THE REAR AXLE.

PANHARD BAR: ONE SINGLE PANHARD BAR MAY BE USED. IT MUST BE MOUNTED BEHIND THE REAR AXLE ASSEMBLY.

WHEELS: 8” STEEL, MINIMUM 19 LBS RACING WHEELS WITH REINFORCED CENTERS ARE MANDATORY.

OEM SNOUTS; BOTH FRONT WHEELS MUST HAVE THE SAME OFFSET. BOTH REAR WHEELS MUST HAVE THE SAME OFFSET. THE FRONT AND REAR OFFSETS DO NOT HAVE TO MATCH.

TUBE SNOUTS; ALL FOUR WHEELS MUST HAVE THE SAME OFFSET.

WHEEL OFFSET IS MEASURED OFF THE INSIDE BEAD SEAT TO THE INSIDE MOUNTING FLANGE OF THE WHEEL.

WHEEL SPACERS: MAY BE USED ON OEM SNOUTS TO OBTAIN TREADWIDTH. BOTH FRONT SPACERS MUST BE SAME THICKNESS. BOTH REAR SPACERS MUST BE THE SAME THICKNESS.

TUBE SNOUTS; WHEEL SPACERS ARE NOT ALLOWED.

VALVE STEMS: NO “BLEED OFF” TYPE VALVE STEMS.

TREADWIDTH: MAXIMUM FRONT & REAR 76”.

TIRES: TRACK TIRE RULE WILL BE IN EFFECT. AMERICAN RACER 8” SLICK. LEFT SIDE TIRE IS EC-84, 26.5 X 8.0 X 15S. RIGHT SIDE TIRE IS EC-85, 27.0 X 8.0 X 15S. 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. LATE MODELS MUST START THE FEATURE WITH THE TIRES THEY QUALIFIED WITH. TIRES CUT DOWN OR DAMAGED IN A QUALIFYING HEAT, MUST GET TECHMANS APPROVAL TO BE REPLACED FOR THE FEATURE. REPLACEMENT TIRE MUST BE A “USED” TIRE, NOT A SCUFF.

ENGINE:

GENERAL SPECS: MUST BE STOCK OEM V8 PRODUCTION CAST IRON BLOCKS AND CYLINDER HEADS. THE BLOCK MUST RETAIN ALL OEM SPECS WITH THE EXCEPTION OF CYLINDER OVERBORE AND SURFACING OF THE BLOCK. ANGLE CUTTING OF THE BLOCK DECK WILL NOT BE PERMITTED. ORIGINAL BORE & 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. STOCK OEM TYPE ENGINE BEARINGS ONLY. NO ROLLER CAM BEARINGS. NO DEBURRING, GRINDING, CHEMICAL (ACID MILLING), OR ABRASSIVE CLEANING OF ANY ENGINE PARTS. NO COATING (EX. TEFLON), PLATING (EX. CHROMING), OR PAINTING OF ANY INTERNAL ENGINE PARTS. OIL RETURN HOLES MAY BE DEBURRED AND/OR COVERED WITH SCREENS. OIL MUST BE PRESSURIZED & DRAIN NORMALLY THROUGH THE BLOCK. EPOXYING MAGNETS TO THE OIL RETURN AREA IS ALLOWED. NO CARBON FIBER ENGINE PARTS. NO PUMPS OF ANY TYPE ALLOWED IN THE EVACUATION SYSTEM. THE ONLY APPROVED ENGINES ARE; CHEVROLET-350, CHRYSLER-340 OR 360, FORD-351C OR 351W.

COMPRESSION: MAXIMUM COMPRESSION IS 10.5:1, CHECKED WITH THE “WHISTLER”. NO TOLERANCE ALLOWED ON MAXIMUM COMPRESSION! THE 2 MOST FORWARD BOLTS ON EACH SIDE OF THE INTAKE MUST BE DRILLED TO ACCEPT A SEAL.

LOCATION: GENERAL MOTORS; THE CENTER OF 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 OR FORWARD OF THE CENTERLINE OF THE UPPER BALL JOINTS. ENGINE MUST BE CENTERED IN THE CHASSIS. ENGINE MUST BE LEVEL AS MEASURED FROM SIDE TO SIDE AND FRONT TO BACK WITHIN ½”. MINIMUM CRANKSHAFT HEIGHT IS 11” MEASURED FROM THE CENTERLINE OF THE CRANKSHAFT TO THE GROUND.

CRANKSHAFT: ONLY STOCK PRODUCTION OEM CRANKSHAFTS ALLOWED. CHEVROLET MUST USE LARGE JOURNAL CRANK. REGRINDING OF THE ROD AND MAIN JOURNALS TO A MAXIMUM OF .030” UNDER STANDARD SIZE IS ALLOWED. THE MAXIMUM ALLOWABLE STROKE TOLERANCE FOR CHEVROLET IS +/- .015”. MAXIMUM STROKE ON A CHEVROLET WILL BE 3.495”. MAXIMUM STROKE ON CHRYSLER WILL BE 3.580”, +/- .005”. MAXIMUM STROKE ON FORD WILL BE 3.500”, +/- .005”. 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 MAY USE PART# P5007253AB. FORD MAY USE PART# M-6303-H351.

OIL PAN: ONLY OEM TYPE IN THE PAN OIL PUMPS ALLOWED. FORD MAY USE A SINGLE STAGE, BELT DRIVEN EXTERNAL OIL PUMP. EXTERNAL PUMP MUST SCAVANGE FROM THE WET SUMP OIL PAN. PRESSURIZED OIL MUST FLOW & DRAIN NORMALLY THROUGH THE ENGINE, NO ADDITIONAL PRESSURE OR RETURN OIL LINES EXCEPT TO OIL COOLER IF USED. EXTERNAL OIL COOLERS ARE ALLOWED.

ENGINE OIL SPECIFICATIONS: THE USE OF COMBUSTION ENHANCING OILS OR ADDITIVES IS NOT PERMITTED.

PISTONS & RODS: FLAT TOP 3–RING ALUMINUM PISTONS ONLY. ALL 3 RINGS MUST BE OF MAGNETIC STEEL. VALVE RELIEF MAY BE CUT INTO THE PISTON. NO PART OF THE PISTON MAY PROTRUDE ABOVE THE TOP OF THE BLOCK. ANY STEEL PISTON RINGS ALLOWED. STOCK TYPE STEEL RODS ONLY. ALL AFTERMARKET RODS MUST BE SOLID BEAM TYPE “SPORTSMAN” ROD. NO HOLLOW BEAM RODS. NO BILLET RODS. MINIMUM ROD LENGTH 5.700”, MAXIMUM ROD LENGTH 6.250”. ALL RODS MUST BE THE SAME LENGTH. MINIMUM WEIGHT FOR PISTON, PIN, RINGS, BEARING & ROD ASSEMBLY IS 1075 GRAMS.

PISTON RINGS: MINIMUM THICKNESS OF TOP & SECOND RINGS .043”. MINIMUM THICKMESS OF OIL RINGS 3mm.

CAMSHAFT: NO ROLLER OR MUSHROOM CAMSHAFTS. NO GEAR OR BELT DRIVEN CAMSHAFTS. ANY TIMING CHAIN MAY BE USED.

VALVE LIFTERS: STOCK LIFTER DIAMETER MUST BE MAINTAINED. NO ROLLER, MUSHROOM, OVERSIZE, CONVEX, CONCAVE OR CERAMIC LIFTERS. ONLY FLAT BOTTOM, MAGNETIC STEEL STRAIGHT BARREL LIFTERS OF THE SAME DIAMETER AND LENGTH AS STOCK. ANY TYPE OF MECHANICAL ASSISTANCE EXERTING A FORCE TO ASSIST IN CLOSING OF THE LIFTER AND/OR PUSHROD (REV KITS) ARE NOT ALLOWED. ONLY MAGNETIC STEEL STRAIGHT BARREL LIFTERS WILL BE ALLOWED IN 2005.

ROCKER ARMS: ROLLER ROCKER ARMS ARE PERMITTED. ROCKERS MUST BE INDEPENDENT AND STUD TYPE. NO SHAFT ROCKERS. STUD GIRDLES PERMITTED. CHRYSLER MAY USE OEM SHAFT SYSTEM. AFTERMARKET SHAFT ROCKERS ALLOWED ONLY WITH CHRYSLER CYLINDER HEAD PART/CASTING# P5007141.

CYLINDER HEADS: STOCK OEM CAST IRON PRODUCTION HEADS ONLY, LIMITED TO 2 VALVES PER CYLINDER. CHEVROLET MUST USE STRAIGHT PLUG HEADS WITH A 2.020” OR SMALLER INTAKE VALVE, EXHAUST VALVE MAXIMUM SIZE IS 1.60”. NO BOWTIE OR VORTEC HEADS ALLOWED. CHEVROLET MAY USE DART IRON EAGLE S/S CYLINDER HEAD PART# 10024266. CHRYSLER MUST USE A CYLINDER HEAD WITH A 2.02” OR SMALLER INTAKE VALVE AND A 1.60” MAXIMUM EXHAUST VALVE. THE FOLLOWING PART NUMBERS ARE THE ONLY CHRYSLER HEADS ALLOWED; PART # P5249574 CASTING # 4772576 OR 448308, PART# P5007086 CASTING # 53021137 OR 53006673 & PART# P5007141. NO W-2 HEADS ALLOWED. FORD WINDSOR MUST USE HEADS WITH A 1.94” OR SMALLER INTAKE VALVE, EXHAUST VALVE MAXIMUM SIZE 1.60”. 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. THIS IS THE ONLY APPROVED AFTERMARKET CYLINDER HEAD! FORD CLEVELAND MUST USE HEADS OF 2 BARREL DESIGN WITH 2.050” OR SMALLER INTAKE VALVE, MAXIMUM EXHAUST VALVE IS 1.660”. FORD MOTORSPORTS N351 OR N352 CYLINDER HEADS ARE ALLOWED. NO PORT MATCHING OR FLOW WORK. NO GRINDING, POLISHING, BEADING OR CHEMICAL (ACID) MILLING ALLOWED. ALL CAST LINES & INSIGNIA’S MUST BE CLEARLY VISIBLE & COMPLETE. BOLT HOLES MAY NOT BE RELOCATED.

VALVES: MUST BE STOCK OR DIRECT REPLACEMENT. STAINLESS STEEL ALLOWED. OVERSIZE STEMS ALLOWED. NO PART OF THE VALVE STEM MAY BE SMALLER THAN STOCK, EXCEPT FOR THE KEEPER GROOVES. NO “PR FLO”, TULIP, ULTRA LITE OR TITANIUM VALVES. VALVES MAY BE COATED OR PLATED (EX. TEFLON).

VALVE SPRINGS: MAXIMUM OUTSIDE DIAMETER OF 1.55”. MAXIMUM INSTALLED HEIGHT OF 1.90”. NO TITANIUM OR ALUMINUM RETAINERS.

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 REMAIN AS CAST FROM THE MANUFACTURER.

INTAKE MANIFOLD: EDELBROCK PERFORMER & RPM 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 INTAKES WITH CURRENT PART NUMBERS ARE NOT ALLOWED. APPROVED PART NUMBERS ARE; CHEVROLET 2101,7101, FORD 2181, 2665, 2750, 7181, CHRYSLER 7176. CHRYLER MUST USE INTAKE PART# P5007381 CASTING# P4510018 WITH CYLINDER HEAD PART # P5007086 OR P5007141. A TRACK SUPPLIED INTAKE MUST FIT YOUR ENGINE.

CARB SPACER: ONE SOLID MATERIAL SPACER, MAXIMUM HEIGHT OF 1” PERMITTED. NO WEDGE SHAPE SPACERS ALLOWED. BOTH THE TOP AND 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 PART# 64930 SPACER.

CARBURETOR: THE HOLLEY R4412 IS THE ONLY CARBURETOR ALLOWED. THE CARBURETOR MUST BE “STOCK OUT OF THE BOX”. ALL CARBURETORS MUST PASS TRACK SUPPLIED 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 THROTTLE PLATES. THROTTLE PLATE SCREWS MAY BE TRIMMED FLUSH WITH SHAFT. NO OTHER CHANGES ALLOWED.NO RESHAPING, POLISHING, GRINDING, MACHINING OR DRILLING ALLOWED. NO ADJUSTABLE (JETTED) AIR BLEEDS OR CIRCUITS. METERING BLOCKS MUST REMAIN UNALTERED. GASKET MUST REMAIN UNALTERED. NO “HP” PARTS ALLOWED.

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.

AIRCLEANER/FILTER: ONLY A ROUND DRY PAPER MAXIMUM 4” AIR FILTER ELEMENT ALLOWED. AIR FILTER MAY NOT BE SPRAYED OR SOAKED WITH CHEMICALS. AIR CLEANER TOP AND BOTTOM MUST BE OF A ROUND SOLID METAL BETWEEN 12” & 14”, MATCHING SIZE OF AIR FILTER BEING USED. CENTER HOLE IN AIR CLEANER BASE MAY NOT HAVE A LIP OF MORE THAN 1’ AS PRODUCED BY THE MANUFACTURER. ALL AIR CLEANERS ARE SUBJECT TO TRACK APPROVAL. NO DUCTS, BAFFLES OR ANYTHING THAT MAY CONTROL AIRFLOW ALLOWED ON OR IN THE AIR CLEANER ASSEMBLY. ALL AIR ENTERING THE CARBURETOR MUST PASS THRU THE FILTER ELEMENT. NO AIR BOXES. A SHIELD MAY BE USED ON THE FRONT OUTER HALF OF THE ELEMENT IF PLACED DIRECTLY ON THE ELEMENT. AIR CLEANERS MUST REMAIN UNDER THE HOOD.

EXHAUST HEADERS: HEADERS MUST BE A COMMERCIALLY MANUFACTURED HEADER USING A STEEL PRIMARY TUBE SIZE OF 1 5/8” OUTSIDE DIAMETER, MAXIMUM 30” LENGTH WITH A COLLECTOR TUBE SIZE OF 3” OUTSIDE DIAMETER. THE HEADER COLLECTOR PIPE CANNOT BE REDUCED AT ANY POINT BETWEEN THE PRIMARY TUBE AND THE EXHAUST PIPE. PRIMARY TUBES MUST EXIT DOWN AND TURN TO THE REAR INTO THE COLLECTOR PIPE. THOSE TUBES THAT DO NOT, MUST BE MOUNTED PARALLEL OR ANGLE DOWN, IN REFERENCE TO THE CYLINDER HEAD, THEN TURN DOWN AND TURN TO THE REARINTO THE COLLECTOR PIPE. NO STAINLESS STEEL, STEPPED OR 180-DEGREE HEADERS ALLOWED. NO SPACERS BETWEEN THE CYLINDER HEAD AND THE HEADER. POSITIVELY NO INSERTS ALLOWED IN ANY PART OF THE HEADER OR THE COLLECTOR. NO MERGE OR PYRAMID COLLECTORS. NO COATINGS OF ANY TYPE IN THE HEADERS. 3” OF THERMAL WRAP MAY BE USED TO PROTECT THE SPARK PLUG WIRES. THERMAL WRAP IS NOT ALLOWED ANYWHERE ELSE ON THE HEADERS. CHEVROLET MUST USE ONE OF THE FOLLOWING HEADERS; DYNATECK # 01-21900, HEADMAN # 68600, SCHOENFELD # 185 OR 151EL. FORD MAY USE SCHOENFIELD PART# 351 OR 551. FORD AND CHRYSLER MUST COMPLY WITH THE ABOVE RULE.

CRATE MOTOR MUST USE SCHOENFELD HEADERS PART# 152-EVCM.

MUFFLERS: MANDATORY! THE ONLY APPROVED MUFFLER IS THE LOBAK RCM 12” SPIRAL FLOW, PART# RCM251225 OR RCM301230. ONLY ONE (1) MUFFLER PER EXHAUST PIPES. MUFFLERS MUST MATCH. END OF MUFFLER MUST BE LOCATED 6” FROM END OF EXHAUST SYSTEM. THE LAST 6” OF THE EXHAUST SYSTEM WILL BE FOR A TURN DOWN. THE EXHAUST SYSTEM MUST EXTEND 6” BEYOND THE DRIVER’S SEAT AND MUST REMAIN UNDER THE CAR. MUFFLERS MUST BE REMOVABLE FOR INSPECTION. MUFFLER MUST REMAIN COMPLETE WITH ENDS AS PURCHASED. CHECK VALVE TUBES NOT ALLOWED IN ANY PART OF THE MUFFLER. NO LEAKS IN MUFFLER OR EXHAUST SYSTEM. ANY TAMPERING WITH MUFFLERS OR EXHAUST SYSTEM WILL RESULT IN DISQUALIFICATION AND LOSS OF ALL EARNED POINTS.

CRATE MOTOR MUST USE SCHOENFELD MUFFLERS PART# 23535.

EXHAUST PIPES: MAXIMUM 3” INSIDE DIAMETER AND MINIMUM 2 ½” INSIDE DIAMETER. EXHAUST PIPES MUST FIT OVER THE COLLECTOR. PIPES MUST EXIT 6” BEHIND THE DRIVERS SEAT. BOTH PIPES MAY EXIT ON THE SAME SIDE, BUT MUST REMAIN UNDER THE 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. GM, FORD & CHRYSLER MUST USE A COIL IN THE CAP HEI TYPE DISTRIBUTOR WITH A GM OEM TYPE IGNITION MODULE. NO AFTER MARKET CAPACITIVE “MSD” TYPE SYSTEMS. THE FOLLOWING WILL NOT BE PERMITTED; ADJUSTABLE TIMING CONTROLS (NO EXTERNAL ADJUSTMENT KNOBS ON THE DISTRIBUTOR), 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, DUAL FIRING MODULE BOX, CRANK TRIGGERED OR MAGNETO SYSTEMS.

CRATE MOTOR MUST USE MSD COIL PART #8222, MSD DISTRIBUTOR PART #8551 AND MSD BOX 6430.

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.

BATTERY: MUST BE MOUNTED INSIDE THE FRAME RAILS AND FORWARD OF THE REAR END. THE BATTERY CANNOT BE INSIDE THE DRIVERS COMPARTMENT. THE POSITIVE BATTERY CABLE MUST BE INSIDE THE FRAME RAILS.

ALTERNATOR: OEM TYPE MUST BE MOUNTED ON THE FRONT OF THE ENGINE.

BELTS & PULLEYS: V-BELTS OR SERPENTINE ALLOWED. NO COG BELTS. ALUMINUM AFTERMARKET PULLEYS ALLOWED.

STARTER: STOCK OR AFTERMARKET ALLOWED. MUST MOUNT IN STOCK LOCATION.

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. NO “RACEMATE” TYPE PUMPS.

FUEL PUMP: ONE MECHANICAL STOCK TYPE DIAPHRAM PUMP 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.

CRATE ENGINE OPTION: GM CRATE MOTOR PART# 88958604; ALL CRATE ENGINES MUST BE SERVICE THROUGH A TRACK AUTHORIZED SERVICE CENTER PRIOR TO COMPETING AT THE SPEEDWAY. ENGINES MAY BE PURCHASED DIRECTLY THROUGH GM. ALL ENGINES MUST BE BROUGHT TO AN AUTHORIZED SERVICE CENTER TO RECIEVE NECESSARY UPDATES, WHICH ALSO INCLUDES A COMPLETE PARTS PACKAGE & DYNO SHEETS.

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

PETTIT RACING ENGINES 44 OLD STATE RD #38 NEW MILFORD, CT 06776 PHONE 860-354-3339

NAT CHIVIATONE & MIKE PETTIT ARE ALSO AVAILABLE AT THE TRACK FOR ANY TECHNICAL ASSISTANCE THAT MAY BE NEEDED BY THE RACER.

ENGINES INITIALLY SEALED BY A SERVICE CENTER WILL BE ABLE TO CUT THE SEALS FOR A REPAIR OR OVERHAUL 1 TIME. ONCE SEALS HAVE BEEN REPLACED, THE ENGINE MUST GO TO THE NEXT SERVICE CENTER FOR A REPAIR THAT REQUIRES THE SEALS TO BE REMOVED. THIS SYSTEM WILL ALLOWS EACH SERVICE CENTER TO REMOVE THE SEALS ONE TIME ROTATING BETWEEN THE 2 CENTERS.

SEALS MAY ONLY BE REMOVED BY A TRACK OFFICIAL OR SERVICE CENTER. RACERS ARE NOT ALLOWED TO REMOVE SEALS. ANY SEALS THAT HAVE BEEN REMOVED OR APPEAR TO HAVE BEEN TAMPERED WITH WILL DEEM THE ENGINE ILLEGAL & MUST BE OVERHAULED TO ORIGINAL SPECS AT THE RACERS EXPENSE. ANY RACER PARTICIPATING IN THE CRATE ENGINE OPTION PROGRAM UNDERSTANDS THAT THE ENGINE MUST BE RUN AS PURCHASED AND ONLY A AUTHORIZED SERVICE CENTER IS ALLOWED TO PERFORM ANY REPAIRS THAT MAY BE NEEDED. ABSOLUTLEY NO MODIFICATIONS OR CHANGES ALLOWED TO THE ENGINE OR CARBURETOR. NO EXCEPTIONS!

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: COMMERCIALLY MANUFACTURED ALL STEEL FULLY ENCLOSED BLOW SHIELD. A 2” HOLE IS MANDATORY FOR INSPECTION OF THE CLUTCH ASSEMBLY. A 1” HOLE IS REQUIRED ABOVE THE RING GEAR TO ASSIST IN CRANKSHAFT ROTATION DURING COMPRESSION TESTING.

CLUTCH & FLYWHEEL: OEM OR EXACT REPLACEMENT MAY BE USED PER THE FOLLOWING; MINIMUM SIZE CLUTCH AND PLATE IS 10”. NO ALUMINUM, TITANIUM OR CARBON FIBER CLUTCH OR FLYWHEEL PARTS, INCLUDING FASTENERS. NO DRILLING, LIGHTENING OR ANY MODIFICATIONS. MINIMUM WEIGHTS ARE; FLYWHEEL 12.5 LBS., CLUTCH COVER 13.0 LBS., CLUTCH DISC 3.0 LBS. HYDRAULIC CLUTCH LINKAGE IS ALLOWED.

CRATE MOTOR CLUTCH; 7 ¼” QUARTER MASTER CLUTCH PART #298103. GM FLEX PLATE PART #14088765 WEIGHT 4 LBS.

TRANSMISSION: STOCK OEM 3 OR 4 SPEED MANUAL TRANSMISSION ONLY. ALL GEARS MUST BE IN WORKING ORDER FROM INSIDE THE DRIVERS COMPARTMENT WITH MECHANICAL LINKAGE. ALL INTERNAL PARTS MUST BE STOCK. STOCK GEAR RATIOS ONLY. NO POLISHING, WELDING, MACHINING, DRILLING OR LIGHTENING OF ANY PARTS. HIGH GEAR MUST HAVE A 1:1 RATIO, AND NO OTHER GEAR MAY HAVE A RATIO CLOSER THAN 1.2:1. NO OVERDRIVE OR SPECIAL PRODUCTION TRANSMISSIONS ALLOWED. TAILSHAFT MAY USE ROLLER/NEEDLE BEARINGS. THERMAL COATINGS ARE NOT ALLOWED.

DRIVESHAFT: STEEL ONLY.

REAREND: MUST BE A STOCK DISC OR DRUM OEM UNIT. NO INDEPENDENT REARS. STEEL ASSEMBLY ONLY. NO ALUMINUM PARTS INSIDE THE REAREND ASSEMBLY. REAREND MUST BE EITHER “OPEN” OR “LOCKED”. POSITIVELY NO POSI, LIMITED SLIP OR RATCHET REARS OF ANY TYPE. THERMAL COATINGS ARE NOT ALLOWED. REARS MAY BE SWITCHED BETWEEN MAKES AND MODELS. AFTERMARKET SPOOLS MAY BE USED. THE CENTERLINE OF THE REAR (PINION FLANGE) MUST BE IN THE CENTERLINE OF THE CHASSIS. THE LEFT AND RIGHT BACKING PLATES OR ROTORS MUST BE OF EQUAL DISTANCE FROM THE FRAME RAILS. THE BRACKETS THAT ATTACH THE TRAILING ARMS MAY BE CHANGED OR RELOCATED. SOLID STEEL AXLES ONLY.

GEAR RULE: MINIMUM 4.68 - MAXIMUM 5.14

CRATE MOTOR: MINIMUM 4.30:1 – MAXIMUM 4.50:1

ADJUSTING DEVICES:

THE ONLY DEVICE IN THE DRIVERS COMPARTMENT WILL BE FOR BRAKE PROPORTIONING. NO OTHER DEVICES OF ANY KIND TO CONTROL OR ALTER THE HANDLING, WEIGHT PERCENTAGE, RIDE HEIGHT ECT. OF THE CAR WILL BE ALLOWED.

ADDITIONAL INFORMATION:

LATE MODELS MUST ALSO COMPLY WITH THOMPSON INTERNATIONAL SPEEDWAY GENERAL/SAFETY RULES.

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, ECT. THE COMPETTOR 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/OR SUSPENSION.