Shelby County Speedway

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HOBBY RULES

362 CUBIC INCH MAX.

602 CRATE ENGINE ALLOWED WITH 100 LB WEIGHT BREAK

CAST IRON OEM PRODUCTION HEADS ONLY 2.02/1.68 MAX VALVES. STOCK SIZE VALVE SPRINGS ONLY. NO GRIND OR PORT AND POLISH MARKS ANYWHERE. MAY FLAT DECK OR ANGLE MILL, CAN USE SCREW IN STUDS AND GUIDE PLATES. ANY ROCKER ARMS. NO BOW TIE HEADS. OEM DOUBLE HUMP REPLACEMENT HEADS OK. CENTER BOLT VALVE COVERSERVICE USE VORTEC HEADS OK. OEM REPLACEMENT SPEC. HEADS OK. (4360,4361). 170CC MAX RUNNER. NO AFTER MARKET HEAD. ANY INTAKE EITHER ALUMINUM OR CAST IRON OK. NO ELECTRIC FUEL PUMPS. NO GRIND OR POLISH MARKS ANYWHERE...

CARBURATOR:

ONE SINGLE VACUUM SECONDARY 750 CFM (3310) OEM TYPE 4 BBL. OEM CARB (QUADRAFET, ROCHESTER). OR 4412 2BBL (4412) WEIGHT BREAK 50 LB. MAY RUN ADAPTOR PLATES BETWEEN THE CARB AND INTAKE.

DISTRIBUTOR:

MUST LOOK ALL OEM

NO MSD BOXES

CAMSHAFT:

HYD. CAM AND LIFTERS LASH RULE AT VALVE 6 THOUSANDS OR .006 ANYTHING MORE IS CONSIDERED A SOLID CAM. OR JUMPER LIFTER SETTING. STANDARD HYDRAULIC CAM. AND LIFTERS ONLY. NO LIFT RULE OR DURATION RULE ANY STANDARD HYD CAM. NO DEGREEING OF CAM AT ALL. DOUBLE CHAIN OK...(3-KEYWAYS) NO HYD ROLLER CAM OR LIFTERS. NO MUSHROOM C/I NO OVERSIZE C/I

COLLECTOR TYPE HEADERS ONLY. NO 180'S.

SET BACK OF ENGINE OK. #1 SPARK PLUG NO FURTHER BACK THAN TOP BALL JOINT.

CRANK AND RODS MUST BE OEM TYPE 3,48/5.7 ONLY IN CHEVY, ROD BOLT UPGRADE OK. PISTONS ANY 2 OR 4 EYEBROW. NO 6" RODS. NO DOME TOP PISTONS. ANY MOTOR THAT WILL PULL 17 LBS VAC. WILL GET 100 LB WEIGHT BREAK.

TRANSMISSION:

ANY OEM TYPE AUTOMATIC OR STRAIGHT SHIFT, IN FULL WORKING ORDER.  NO REMOVAL OF INTERNAL GEARS, NO LIGHT WEIGHT PARTS. FLYWHEEL 15 LBS MIN. CONVERTER 10" WORKING CONVERTER OEM MIN. MAY RUN STALL CONVERTERS. NO MINI 2 OR 3  DISK CLUTCHES.

SUSPENSION:

OEM SUSPENSION. LOWER FRONT AND ALL REAR ARMS MUST REMAIN OEM AND IN OEM LOCATION. MAY RUN TUBULAR FRONT A-ARMS NO SHORTENING OR LENGTHENING. ALUMINUM RADIATOR OK. SUSPENSION MAY RUN RACING SHOCKS AND RACING SPRINGS, ONE SHOCK PER WHEEL IN STOCK LOCATION. 5 INCHES ON SPRING MIN. NO PANHARD PULL BARS OR J BARS OR TRACK BARS ON REAR. ADJUSTER CUPS OR SPACERS OK. NO JACK BOLTS.

REAREND:

REAREND MUST BE OEM AUTOMOTIVE TYPE MUST BE OEM BRACKETS FOR MAKE OF CAR. ALL LINKAGES MUST BE OEM AND IN OEM LOCATION. CAN LOCK REARS CAN USE AFTERMARKET STOCK REPLACEMENT AXELS. MAY RUN 9 INCH FORD FLOATER REAR END. NO QUICK CHANGE REAR ENDS.

WHEELS AND TIRES:

ANY 10 INCH STEEL WHEEL WITH ANY OFFSETS, BEAD LOCKS OK. NO WIDE 5 WHEELS WITH ADAPTOR PLATES. ANY 11 OR 12 INCH RACING TIRES ANY MAKE, ANY COMPOUND.

BRAKES:

BRAKES MAY RUN DUAL MASTER CYCLINDERS MAY RUN DISK BRAKES ON ALL 4 WHEELS.

BODY:

WHEEL BASE MIN. 108 INCHES

WEIGHT 3100 LBS WITH DRIVER AT ANYTIME. CARS WITH 602 CRATE ENGINES OR PULL 17 LBS OF VACUUM MAY WEIGH 3000 LBS. WILL ALLOW 10 LBS OF BURNOFF AFTER RACE.

BODY-STOCK BUMPERS MAY BRACE. NOISE PIECE OK.  IF STOCK BUMPER SHELL IS UNDERNEATH, NO SHARP EDGES OR CATTLE CATCHERS. LOOP BAR OK ON FRONT OEM SHEET METAL BODIES ONLY

MAY HULL FENDERS, DASH, DOORS, HOOD, TRUNK LID. ENCLOSED COCKPITS ALLOWED. FIREWALL, FLOOR PAN REAR HAT RACK AND TRUNK MUST REMAIN STOCK, EXCEPT HOLE FOR FUEL CELL. SPOILERS 8 INCH OR OEM OK. PICK CHAINS ON FRONT AND REAR MANDATORY. NERF BARS OK. NO SHARP EDGES. 1964 OR NEWER AMERICAN SEDAN. NO COMPACT SPORTS CARS.

IF IT DOES NOT SAY YOU CAN THEN YOU CAN NOT>>>>