M 40 Speedway ABC Class Rules 2012

The ABC Stock Car Classat the M 40 Speedway is designed for many different variations of stock cars which are currently racing at most local short tracks in Michigan and surrounding states. (this will allow drivers from other tracks to come race with us on Friday Nights with little or no changes to the race car) The most common classes of cars are typically known as Sportsman, Street Stock, and Pure Stock. Other names for allowable classes to compete in this series might be Pro Stock, Super Stock, Factory Stock, Lead Sled, Thunder Cars, and Bomber. This class is designed for current up to date race cars as well as what many consider to be old and outdated race cars.

The basic ABC Stock Car is V8 powered and rear wheel drive.

The most important rule is this: Any car that is deemed too radical and too much outside of the rules of typical stock car classes that can be found competing at various other area tracks will not be allowed.

With that said, the rules for this class are fairly open, but will be controlled by M 40 Speedway  officials if necessary. Interpretation of these rules is for the M 40 Speedway officials and final decision is in the hands of the Race Director. 

There will be 0 tolerance on qualifying times !!!! 
 
 Eligible Chassis
* Factory production uni-body cars
* Factory stock full frame cars
* Stock front sub frames with tubed center and rear sections
* Full tube frames
* Minimum wheel base is 102 inches 
 
 Bodies
* The most important rule here is that bodies MUST REMAIN AS STOCK APPEARING AS POSSIBLE. This means that cars must have all body panels (hood, roof, deck lid, fenders, doors, quarter panels, nose, and tail) that would be seen on any street legal production car/truck. Any cars that do not look like a stock car/truck will not be legal.
* Rear panels must be fully enclosed from top of rear deck to bumper and from left quarter panel to right quarter panel.
* Maximum overall width of any part of the car is 82 inches
* Bodies may be factory stock production, fabricated stock appearing, or template style. Again the key point is to keep it stock appearing.
* Bodies may be constructed of sheet metal, aluminum, or fiberglass, Plastic nose/tail bumper covers OK.
* Nose Rule: Noses must be stock appearing or ABC template style. NO outlaw asphalt or dirt late model noses. Noses must be vertical, not laid back. 
 
 Spoiler
* Maximum spoiler height is 6 ½ inches
* Spoiler must be no wider than the rear of the quarter panels and must be made of clear material
* Supports made of small tube or bar material ok, but must be no higher than the top of the spoiler.
* If flat vertical supports are used, they may be no higher than the spoiler and must taper forward and be no longer than 12 inches. 
 
 Engines/transmissions
* Must be production style cast iron block with cast iron heads. NO ALUMINUM HEADS
* Wet sump with internal oil pump only. NO DRY SUMP ENGINES
* Any intake with any single 2bbl or 4bbl carburetor.
* Maximum engine setback is 2 ½ inches measure from the centerline of upper ball joints to center of furthest forward spark plug hole.
* No magneto ignitions.
* Any stock manual or automatic transmission. Must have working reverse gear.
* Bert/Brinn/other racing transmissions ADD 50 POUNDS 
 
  Exhaust
* Headers allowed
* Single or dual exhaust OK.
* Exhaust must exit behind driver and may not pass through driver compartment 
 
 
 Rear End
* Stock four link OK
* Three link OK
* Quick change, ford 9 inch OK 
 
 Brakes
* Must have working brakes at all four wheels
* In-cockpit brake adjusters are permitted 
 
 Suspension
* Tubular upper control arms allowed
* Screw jacks allowed
* 5 inch Coil over shocks allowed. Shocks must be fully contained with no external components, lines, canisters, etc. $200 claim on all shocks STRICTLY ENFORCED BY TRACK MGMT
 
 Wheels/Hubs
* Steel made for racing wheels with a maximum width of 8 inches.
* Wide 5 hubs ADD 25 POUNDS
* One inch minimum lug nuts, studs must be flush with outer edge of lug nut
* Car will be deemed unsafe for racing if more than one stud on any wheel is broken 
 
 Tires
* Hoosier 970 880 790 800 TRACK TIRE TBA 
 
 
 Weight
* The weight for this class begins with a full stock chassis with stock suspension mounting points. The base weight is 2900 lbs. Weight is measured pre-race with driver.
* Wide 5s add 25 pounds
* Rack and Pinion add 50 pounds
* Bert, Brinn, or Falcon Tranny add 50 pounds
* Full tubed strut type chassis -3100 with 58% left side (Strut cars allowed to run wide 5s, bert or brinn tranny, and rack and pinion with NO additional penalty)            
* Any added weight must be secured with two ½ inch bolts and may not extend below the bottom of the frame rails at any point. All weight must be painted white and have car number clearly marked on it 
 
 
 Other
* Four post roll cage of quality construction/welding is required. Cage must be constructed of round tubing and may not be black pipe material. Must be welded, not bolted together
* Properly mounted window net with quick release is required on the driver’s side
* A racing fuel cell is mandatory, stock gas tanks are not allowed. If the bottom of the fuel cell is located below the bottom of the frame rails, it must be protected with a steel hoop properly welded to the frame behind the cell
* Front and rear firewalls must be completely sealed from the driver's compartment
* Battery must not be located in the driver's compartment 

Contact the Speedway office (269)244-8580 or on line at tony@michianaspeedzone.com with any questions