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Pure Stock V-8 Rules - 2009 Northern Michigan Speedway, Inc.
Phone: 231-549-3040 |
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1) Chassis/Body: Any American made steel
production body, passenger car (1960-2000). No sub-compacts
such as Vega, Pinto, etc. Full size trucks only. All
doors must be bolted or welded shut. No chopping, shortening
or cutting on body allowed, except for tire clearance only.
May remove front inner fenders. Rear wheel tubs and trunk must
remain intact (remove old gas tank). Sheet metal for sides to
replace damaged doors or quarters may be aluminum. Trunk, roof
and hood must be steel. All glass, chrome and interior trim
must be removed. Windshield is mandatory - Lexan recommended.
Window net on driver's door is mandatory. No mirrors allowed.
Wheel base must be 108 "-110". 105" wheel base is allowed, but
200 lbs must be added to car. 1" rub rail allowed - 1" square
with carriage bolts only; both ends must be ground down flat. 2) Frame: Must be full frame. Uni-body may be used but must be tied together with 2"x3" minimum tubing. Must have a lifting hook securely attached to frame at both the front and rear of vehicle - must be easily accessible by tow truck operator. 3) Weight: Must weigh 3300 lbs. Added weight must be in center of trunk or over axle, or track officials discretion. 4) Bumpers: Must be stock, and welded to frame. 5) Interior: Bracing bars may extend forward or rearward through firewalls for safety purposes only and welded to back of bumpers and frame. Interior must be gutted completely. Front and rear firewalls must be completely covered with sheet metal. Approved racing seat only - with appropriate tubular framing and securely mounted to roll cage; must be mounted in stock location - 3" in front of rear door opening. Must have standard firewall and floor board. No tunneling or boxing of interior. Must have 4-point design roll cage, 1 1/2" O.D. minimum, mill steel. Door plate and foot plate mandatory - 10"x30"x1/8". Three drivers door protection bars mandatory (2 bars on passenger side door). 6) Engine: V-8 only. Must be stock appearing. No roller tip motors. Motor mounts must be stock and in stock location. Cast iron intake, heads and blocks. (No corvette intakes..) GM to GM, Ford to Ford only. No Vortec heads. Scatter shield mandatory over bell housing. Stock battery ignition only. No dual point distributors. No magnetos. No electric fuel pumps. No frame cut out to clear fuel pump. No electric fans. Compression will not exceed 155 lbs. Maximum cubic inch for engine is 360. 7) Carburetors: 1 11/16” #4412 Holley 2bbl only - 2 or 4 bbl cast iron intake, no high rise, 1” adapter allowed. Rochester 4 bbl carb allowed. 8) Brakes: Must have four wheel brakes. No rear disc brakes allowed. No double master cylinders allowed. 9) Rear Ends: Stock rear ends only - locked or unlocked allowed. No Ford 9" rear ends. No 3 links. 10) Transmission: Automatic transmission of production type (must have torque converter). No standard transmission. Transmission must have one forward and reverse in working order. No buttons or direct drive. 11) Wheels & Tires: Steel wheels only - 8" maximum. Racing-type wheels allowed. All wheels must be reinforced. 1" Hex lug nuts are mandatory. Tires must be passenger car type, 8" maximum width DOT tires only. No mud grips, snow tires or racing tires of any kind allowed. 12) Suspension: All suspension and steering components must remain stock for that vehicle. No shortening or lengthening of A-arms. Stock mounts in stock locations - one shock per wheel only. No screw jacks allowed. No adjustable springs or cups. No aftermarket springs allowed. 1 inch see through hole in spring pocket in front end. Must have 6" ride height. 13) Fire Extinguisher: 2 1/2 lb dry chemical fire extinguisher mandatory - with gauge, charged, and located within easy reach of driver, securely mounted (no tape). 14) Fuel Cell: Mandatory. Must be properly mounted in trunk area. 15) Seat Belts: Aftermarket 5-point seat belt mandatory - must be secured to roll cage. 16) Drive Shaft: Must have loop - must be constructed of at least 1/4"x2" steel and should be mounted no more than 6" back from front of drive shaft. 1/4" chain, or larger, can be used in place of steel strap. Drive shaft must be painted white or a florescent color. 17) Batter Location: Location is optional. If mounted in drivers compartment, it must be enclosed and securely mounted in marine-type battery box. 18) Helmet: Mandatory - must be 85 snell or better. 19) Racing suit: Mandatory |