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Here are our rules.
CATPA RULES FOR ANTIQUE MODIFIED TRACTORS
ALL SAFETY RULES WILL BE IN FORCE AT ALL TIMES ON AND OFF THE TRACK! SAFETY FIRST! CLASSES OFFERED WILL BE 4000 LBS, 4500 LBS, SMALL BLOCKS (365 CU. IN.). 5500 LBS, 6000 LBS, BIG BLOCKS (500 CU. IN.) 5000 LBS OPEN. TRACTORS MUST USE THE REAR END AND SHEET METAL (TRANSMISSION OPTIONAL) FROM A FARM TRACTOR OF THE YEARS 1963 AND BEFORE. HOOD MAY BE MODIFIED AND/OR EXTENDED TO ACCOMMODATE THE AUTOMOTIVE ENGINE AND/OR TRANSMISSION. TRACTORS MAY HAVE FRAMES EXTENDED OR REPLACED, BUT NO PART OF THE TRACTOR (INCLUDING WEIGHT BRACKETS) SHALL EXTEND FURTHER THAN 13 FEET (156 INCHES) FROM THE CENTER OF THE REAR WHEELS. THE REAR WEIGHT BRACKET SHALL NOT EXTEND PAST THE REAR TIRES. THE FRONT WEIGHT BRACKET MUST NOT EXTEND MORE THAN 12 INCHES IN FRONT OF THE FURTHERMOST PORTION OF THE GRILL OR MAIN FRAME OF TRACTOR. THE WHEEL BASE OF THE TRACTOR (CENTER OF FRONT WHEEL TO CENTER OF REAR WHEEL) SHALL NOT EXCEED 10 1/2 FEET (126 INCHES). ANY AUTOMOTIVE OEM 6 CYLINDER OR SMALL BLOCK OR BIG BLOCK V-8 NATURALLY ASPIRED CAST IRON ENGINE (WITH OEM CAST IRON HEADS) WITH A MAXIMUM OF 365 CUBIC INCH DISPLACEMENT SMALL BLOCK, OR A MAXIMUM OF 500 CUBIC INCH DISPLACEMENT BIG BLOCKS. NO FUEL INJECTION. ALUMINUM INTAKES ALLOWED. SMALL BLOCK MAY RUN 6500 RPMS, BIG BLOCKS CAN RUN 6000 RPMS. EVERY TRACTOR MUST BE EQUIPPED WITH A MEMORY TACHOMETER AND A TRACK OFFICIAL WILL CHECK THE MEMORY TACH AT THE END OF EACH PULL. IF MEMORY TACH IS NOT WORKING OR IS OBVIOUSLY INACCURATE, THE TRACTOR WILL BE DISQUALIFIED. TRACTORS MUST BE EQUIPPED WITH A 4-PRONG TRAILER LIGHT PLUG (FEMALE END) IN ORDER THAT CATPA CAN, AT THEIR OPTION, ATTACH AN ASSOCIATION OWNED TACH TO THE TRACTOR AT ANY TIME (BEFORE PULL, AFTER PULL, OR TACH ON TRACTOR DURING PULL). THE PLUG SHOULD BE WIRED AS FOLLOWS: A) WHITE WIRE-GROUND; B) BROWN WIRE-12 VOLT POWER SUPPLY; C) YELLOW WIRE-COIL/TACH; D) GREEN WIRE-LIGHT (OPTIONAL). TRACTORS MAY USE GASOLINE OR HIGH OCTANE RACING FUEL ONLY. NO NITROUS OR ANY ADDITIVES ALLOWED. NO PRESSURE ON FUEL TANK. TRACTORS MAY RUN EITHER AN AUTOMOTIVE AUTOMATIC OR MANUAL TRANSMISSION IN ADDITION TO THE TRACTOR TRANSMISSION, OR THE AUTOMOTIVE TRANSMISSION (MANUAL OR AUTOMATIC) MAY BE CONNECTED DIRECTLY TO THE DIFFERENTIAL. ALL AUTOMOTIVE TRANSMISSIONS MUST BE COVERED WITH A CURRENT (NOT OVER 4 YEARS OLD) SEMA APPROVED SAFETY BLANKET OR SHIELD AND BE SECURED AS SPECIFIED BY SEMA. ALL ENGINES USING A CLUTCH MUST BE EQUIPPED WITH A CURRENT SEMA (OR NHRA) APPROVED CLUTCH HOUSING, FLYWHEEL, PRESSURE PLATE, AND CLUTCH DISC. OR THE CLUTCH, FLYWHEEL, PRESSURE PLATE, AND CLUTCH DISC MUST BE COVERED WITH AN SEMA APPROVED SAFETY BLANKET OR SHIELD AND SECURED AS SPECIFIED BY SEMA. THE REMAINING DRIVE TRAIN TO THE ORIGINAL TRACTOR TRANSMISSION (OR DIFFERENTIAL IF NOT USING THE TRACTOR TRANSMISSION) MUST BE SHIELDED 360 DEGREES WITH 3/16 INCH STEEL OR 3/8 INCH ALUMINUM AND FASTENED EVERY 6 INCHES WITH 3/8 INCH GRADE 50 OR BETTER BOLTS OR BUTT SEAM WELDED. ALL ENGINES MUST BE EQUIPPED WITH AN ELECTRIC COOLING FAN. NO OEM OR OEM REPLACEMENT FANS ARE ALLOWED. ALL AUTOMATIC TRANSMISSIONS MUST BE EQUIPPED WITH A SAFETY SWITCH TO PREVENT STARTING UNLESS IN PARK OR NEUTRAL. TRACTORS EQUIPPED WITH MANUAL TRANSMISSIONS MUST HAVE A SAFETY SWITCH SO CLUTCH MUST BE DEPRESSED IN ORDER TO START ENGINE. ALL TRACTORS MUST BE EQUIPPED WITH KILL SWITCHES AND WHEELIE BARS AS SPECIFIED BY CATPA. KILL SWITCHES MUST CUT OFF THE IGNITION AND STOP THE ELECTRIC FUEL PUMP, IF SO EQUIPPED. ALL TRACTORS MUST BE EQUIPPED WITH A "RETURN TO IDLE" DEAD MAN THROTTLE. ALL EXHAUST PIPES MUST POINT STRAIGHT UPWARDS. A 2 1/2 POUND ABC FIRE EXTINGUISHER MUST BE MOUNTED WITHIN EASY REACH OF THE DRIVER. HITCH POINT MUST NOT BE OVER 21 INCHES HIGH OR CLOSER THAN 18 INCHES FROM A LINE EXTENDING CENTER TO CENTER OF THE REAR WHEELS. TIRES MAY BE CUT. WHEEL DIAMETER MUST NOT EXCEED 38 INCHES. MAXIMUM WIDTH OF TRACTOR IS 96 INCHES. TRACTORS MUST HAVE FENDERS THAT ARE A MINIMUM OF 2 INCHES HIGHER THAN THE TIRES AND ARE WIDE ENOUGH TO COVER THE DRIVER'S BODY. TRACTORS MUST HAVE SAFETY SHIELDS OF A MINIMUM OF 1/8 INCH THICK STEEL ON EACH SIDE OF THE ENGINE EXTENDING THE FULL LENGTH OF THE ENGINE. THE SHIELD MUST EXTEND AT LEAST 2 INCHES BELOW THE POINT OF THE LOWEST THROW OF THE CRANKSHAFT AND TO THE TOP OF THE PISTON TRAVEL. SHIELD MUST NOT BE ATTACHED TO THE ENGINE. STARTER, MOTOR MOUNTS, AND OTHER ACCESSORIES DO NOT QUALIFY AS BEING PART OF THE SHIELD. ALL TRACTORS MUST BE EQUIPPED WITH A ROLL BAR OR ROLL CAGE. THE ROLL BARS AND ROLL CAGES MUST BE OF SUFFICIENT STRENGTH AND HEIGHT TO PROTECT THE DRIVER. A FACTORY MADE ROPS WILL BE ADEQUATE. ALL ROLL BARS, ROLL CAGES, AND ROPS MUST BE ATTACHED TO THE MAIN FRAME OR AXLES OF THE TRACTOR. ROLL BARS, ROLL CAGES, AND ROPS MUST BE OF SUFFICIENT STRENGTH STEEL (NO ALUMINUM) TO PROTECT THE DRIVER AND SUPPORT THE TRACTOR IN THE EVENT OF AN ACCIDENT. AUTOMOTIVE EXHAUST PIPE WILL NOT BE ALLOWED FOR CONSTRUCTION OF ROLL BARS AND ROLL CAGES. TRACTORS MUST HAVE BACK ON SEAT. MINIMUM OF 6 INCHES HIGH, MEASURED FROM TOP OF SEAT RIM. TRACTORS MUST BE EQUIPPED WITH SEAT BELTS AND DRIVERS MUST HAVE THEM FASTENED WHILE PULLING. IT IS RECOMMENDED THAT DRIVERS WEAR HELMETS WHEN PULLING. ALL CATPA RULES APPLY. TIRE SIZES: SMALL BLOCKS: 4000-4500 LBS. (365 CU. IN.) 18.4 x 38 BIG BLOCKS: 5500-6000 LBS. (500 CU. IN.) 24.5
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