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Factory Stock Rules - 2009 Northern Michigan Speedway, Inc. Phone: 231-549-3040 Updated: |
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1) Chassis: American made models only - 1950 or newer (no station wagons or convertibles). Full frame only. Must be strictly stock. Camaros allowed - frame must connect. Full size trucks only. No cutting, chopping, channeling or shortening allowed. No holes in hood except for pins or chain. Body sheet metal must be kept in place at all times; stock floor pan & firewall. 2) Wheel base: Minimum of 108“, 6 inch minimum frame height. If using tube frame on rear end, must be stock location and 108” wheel base. 3) Body: Any exterior metal work must be done in steel or aluminum. Interior metal work may be done in aluminum. All glass must be removed. Windshield mandatory - Lexan recommended. Headlamps, lights, and any chrome strips must be removed. No mirrors allowed. Driver entry/exit must be 13”x24” unrestricted minimum. Window net is mandatory. Drivers seat must be securely fastened and seat adjustment track pinned or bolted to prevent movement. Aftermarket 5-point seatbelt mandatory; must be secured to roll cage. Bumpers must remain intact. 4) Roll Cages: Two braces may be placed from top of rear cage to rear bumper area and may have an “X” for strength. Any installation must be for extra safety of the driver. Tubing must be no smaller than 1 ½” O.D. with .095 thousandths thickness - subject to track officials approval. Door plate and foot plate mandatory - 10”x30”x1/8”. Three driver protection bars mandatory. 4 post roll bar required. Front hood optional but must not pass through grill or front of car. 7) Engine: Over 360 cubic inch, 12.5 compression. Penalty for 400 cubic inch engines: add 150 lbs. Must be original motor mounts. 8) Carburetors: 1 11/16“ #4412 Holley 2-bbl, or Rochester 2 bbl 9) Intake: Cast iron or dual-plane aluminum intake only 10) Motor Mounts: Must be stock and in stock location, bolted - not welded, no exceptions; solid mounts allowed. 11) Exhaust: Intake and manifolds must be stock for that make/model. Mufflers are mandatory. 12) Center Dumps: Allowed - no aftermarket ignition systems. No dart heads, angle heads, etc. 13) Radiator: Over-flow (can) mandatory 14) Transmission: Factory stock transmission cooler allowed. Transmission couplers allowed. 15) Drive Shaft: Must have loop. 16) Suspension: Must be for that make/model/year. This will be enforced. No lumber, chain, spacers, cutting or welding allowed. Tubular upper A-arms optional. 17) Springs: Spring Cups in front; Screw Jacks in Rear 18) Spoilers: 8” spoilers allowed 19) Battery: May be moved into cab area, covered, and securely fastened. 20) Bumpers: Reinforcing of front bumper allowed - must be rounded off. 21) Radiator: Small radiator guard behind grill is allowed. 22) Tires: American Racer P265-60 or P60-265 - 8” tires 23) Wheels: 8” wide maximum. No mags. Steel only. All wheels must be store-bought painted safety-approved. Aftermarket only. 24) Fuel cell: Mandatory - must be no less than 8” from ground. No fuel cell with lines on bottom of fuel cell. Gas tank must be painted red and securely fastened in trunk. 25) Exhaust: Must exit behind drivers area. 100 decibel maximum. 26) Helmet: Mandatory- 85 snell or better. 27) Fire Suits: Mandatory 28) Fire Extinguisher: Mandatory - must be mounted in a quick release bracket within drivers reach. 29) Hood: Scoop - 3” high - is allowed 30) Fuel Pump: Must have mercury switch on electric fuel pump. 31) Flywheel: No aluminum allowed. Racing clutch allowed. 32) 9” Ford rear end allowed - must be stock appearing. 33) Brakes: Disc brakes allowed. Brake adjusters of any kind must be outside of drivers compartment. No brake floaters allowed. 34) Weight: Minimum weight - 3200 lbs - cars and trucks with driver, after race. Weight may be added to vehicle, but must be securely fastened (officials discretion). (Camaro, Firebird, Thunderbird, Mopar) If stock frame and rear end - must weigh 3200 llbs Fabricated frames - Not stock frame from rear of transmission to rear of car - add 150 lbs
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