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Section 32 - LIGHT SUPER STOCK TRACTORS (LSS)

Unless specifically outlined below in the class specific rules, the Tractor General Rules and the overall General rules outlined above will apply.

32.1 - General Rules

  1. Component chassis is allowed.

  2. Light Super Stock Tractors will compete at a maximum weight of 6,200 lbs.

  3. Appearance to remain stock of given brand and model.

  4. Any stock AG block in a component chassis, the sheet metal does not need to match the block.

32.2 - Chassis

  1. All component tractors can run a maximum 114-inch wheelbase, with a maximum overall of 13 feet from center of rear axle to forward most point.

  2. All tube ladder-type frames must be covered on the outside with steel or aluminum 0.060 thick and run in the same plain as the crankshaft.

  3. Engine location on component Super Stock Tractors: centerline of the crankshaft may not be below the centerline of rear axle and must be parallel within two (2) degrees in relationship to the ground. Two (2) degrees equals 7/16 inch per foot. This equals approximately four (4) inches of fall from the center of the rear axle to the 114-inch wheelbase point. This is to be measured with tire, hitch and weight in ready to pull configuration.

  4. All engines in component Super Stock tractors to be mounted no farther forward than 60 inches from the centerline of the rear axle to rear of the engine block.

  5. Crank shaft centerline to be between top and bottom rail of frame. Bottom of frame rail may be no more than six (6) inches below centerline of crankshaft from rear of engine block forward.

32.3 - Tires

  1. Tire size allowed is 30.5 X 32 maximum. See General Tractor Rules for dimensions

32.4 - Engine

  1. All Light Super Stock tractors are limited to 505 cubic inch +1 % maximum.

    1. Only two (2) valves per cylinder must be parallel with each other and parallel within 15 degrees of cylinder wall.

    2. OEM canted valve heads allowed.

  4. No V8 engines are allowed in Light Super Stock class.

  5. The engine block cannot be modified externally from OEM configuration, except for normal repair or for mounting of fuel injection pumps.

  6. No billet steel or billet aluminum blocks allowed in Light Super Stock class.

  7. Recast steel or recast aluminum block is allowed.

    1. Stock crankshaft must swing completely in the block.

    2. Stock head bolt locations must be maintained.

    3. Stock camshaft gears to work in the stock locations.

    4. Maximum of 1” added to deck height over stock.

  8. Computer operated ignition systems are not allowed.

32.5 - Turbocharger

Light Super Stock has the following turbocharger intake wheel limits.

  1. Bottom turbocharger to be no larger than 4.800” inducer.

  2. Vehicles with two atmospheric turbochargers are limited to a 4.800” inducer size maximum and a minimum of 7 blades.

  3. Vehicles with three top atmospheric turbochargers are limited to a 4.000” inducer size and a minimum of 8 blades.

  4. Wheels must protrude into housing a minimum of 1/8” and be no larger than the maximum size stated above.

32.6 - Fuel & Water

  1. VP Racing Fuel is the only fuel that is allowed for use in all pulling vehicles. VP TORQ DX fuel is allowed.

  2. VGM water is the only water injected water that is allowed.

  3. A \$50 fine will be assessed for lack of fuel and water test ports for all classes.

  4. A \$50 fine will be assessed for any minor infractions of fuel or water quality.

  5. No alcohol, alcohol-based substances, other additives and/or formulas containing alcohol of any kind or manner may be used or allowed in water injection.

  6. No alcohol is to be injected before the throttle body.