Modified and Open Super Stock

  

· Weight: 1050 lb

· Age limit on class participation: 12 years old and/or physically capable of being in full control of their tractor at all times unassisted.

· Open to Single Cylinder and Twin Cylinder garden tractors only! Any type of naturally aspirated induction is permitted.

· Wheelbase: 56” maximum

· Fuel: Alcohol or gasolines are allowed. No Nitrated or Oxidized fuels allowed.

· 50.500 cubic inches maximum Aftermarket blocks are permitted.



Open Super Stock

· Light Weight 1100 lb Heavy Weight: 1150 lb

· Age limit on class participation: 12 years old and/or physically capable of being in full control of their tractor at all times unassisted.

· Maximum two (2) cylinders. These can be in separate engines (i.e. two single cylinder engines) or three

· cylinders diesel fueled engines. Maximum of 75 cubic inches.

· Any type of induction is permitted. Methanol only in non­diesel engines.

·  Diesel Rules:

· Water injection permitted, water or water soluble oil mixture only.

· Stock head for engine make and model, no external welding except for repair.

· No overhead cam engines.

· Stock OEM intake and exhaust manifold. Porting and polishing allowed. No tube manifolds.

· Engine block model and serial numbers must be visible.

· Stock or Component frames with stock appearing garden, compact, or farm tractor sheet metal with full engine shields (side shields must be a minimum of 1/16” steel or aluminum). Tube chassis must be covered with sheet metal.

· No Billet fuel injector pumps or electronic fuel injection.

· Limit one (1) turbo, no size restriction.

· No intercoolers or ice boxes.

· Kill switch must shut off electric fuel pump and shut air off on compressor side of turbo.

· Exhaust “L” of turbo must have a minimum of 5/16” cross elbow with exhaust to discharge vertically.

· No propane or nitrous of any kind.

· Must run ¼” cable around oil pan over top of valve cover in between #1 and

· #2 cylinder in a complete circle connected with cable clamps (minimum of two (2) clamps).

· Steel flywheel required with flywheel inspection hole in bell housing.

· Flywheel, front cast pulleys and clutch must be shielded 360 degrees with 1/8” steel or 3/16” aluminum SFI approved scatter blanket also acceptable.

· No belt driven cooling fans allowed, must be electric fans.

· All other general rules apply.

· Fuel: Alcohol or gasoline is allowed. Diesel fueled tractors MUST run diesel fuel only with no additives. Maximum wheelbase: 56”

   Cb