Diesel Truck 3.0 Smooth Bore Rules

  1. Maximum weight 8000 lbs.
  2. The OEM chassis is mandatory. The vehicle must retain the full OEM chassis. Wheel tubs, back-half conversions, tube chassis are prohibited. Maximum wheelbase 158” and 102” maximum width (outside tire to outside tire). Rigid suspension allowed. Hydraulic steering is allowed.
  3. The body must be an OEM truck body, including the complete OEM floor pan and must retain complete OEM firewall. Complete bed floor, hitch is allowed to protrude thru the bed floor with minimum amount of floor removed. No flatbeds permitted. The body must retain the full sheet metal, aftermarket steel hoods are permitted. The hood must be closed and securely latched while hooked to the sled.
  4. Maximum engine size will be 460 cubic inch. Engines must come from factory in one ton or smaller diesel pickup truck. Engine must remain in stock location as intended by manufacturer. Engines may be interchanged between manufacturers.
    1. No aftermarket blocks permitted.
    2. Head must be OEM or OEM one piece cast replica for that brand engine. No billet heads of any material. Outside dimensions of cylinder head must measure factory width and length. Head must retain OEM valve angle.
  5. Front of engine block can be no farther forward than 17” of center line of front axle.
  6. All engines will have a deflection shield, running the complete length of the block casting. Shield must be securely fastened and must be .060” thick. (This equates to a steel inner fender)
  7. Hook point must be no closer than 44” of center line of rear axle, hitch height maximum of 26”, with a minimum of a 3.75”x3.0” opening. Hitch point must be easily accessed. No “trick” type hitches permitted. Hitch must be stationary in all directions. Hitch must be frame mounted. Hitch must be mounted center line of rear axle or behind. Hitch must not exceed a maximum of 25 degree angle from pivot point to hook point. No hitch supports or adjusters, if fastened to the rear axle housing shall be above the center line of rear axle. Pivot pin of drawbar can be no farther forward than center line of the rear axle.
  8. The turbocharger is smooth faced intake housing, limited to a maximum of 3.005” inlet (no map ring) with all air entering through the 3.005” opening. Intake wheel (including primary blades) must protrude 1/8th inch inside opening.
  9. Exhaust must exit straight up, with (2) 3/8” bolts mounted in a cross pattern no more than 1” apart as close to the turbine wheel as possible, no more than 6” away from turbine wheel.
  10. Intercoolers allowed. Dumping or draining intercoolers without a catch pan within 100 feet of competition track is prohibited.
  11. Water injection is prohibited. All components must be removed from the truck.
  12. Air shut off must have a cable that goes to the rear of truck operated by the sled operator and also one to the cab of the truck. Kill switch will be securely mounted to the back of the vehicle and have a two (2) inch diameter metallic ring to attach to the sled.
  13. Fuel Systems: Maximum of one P7100 pump, limited to one plunger per cylinder. The use of multiple high pressure common rail fuel pumps is allowed. Ford Powerstroke engine may utilize a second HPOP, Electronic fuel injection is permitted. A 3-way dump valve mounted before the injection pump is mandatory which can be operated by the driver while strapped in the seat.
  14. No fuel line or tanks permitted inside of truck cab unless securely mounted in marine box.
  15. Fuel limited to diesel fuel. No alcohol, nitrous, propane or any oxygen enhancing agents allowed.
  16. Must have 3 way dump valve. Must be able to be pulled from drivers seat.
  17. Must run DOT approved tires. Maximum tire height 35”, no studded tires or chains. No alteration to DOT tires allowed. Dual rear wheels are permitted on rear axle only. Maximum of 6 tires.
  18. Front weights must be no more than 60” from the center line of the front axle to forward most point and be securely fastened. No weights are allowed in cab of the truck. If weights are located in the bed of truck they are to be securely fastened to the bed of the truck.
  19. Drive train will consist of the following: Any front axle, any transfer case and any rear axle. No planetaries permitted.
  20. Axle shields are required. Shield to be .060” thickness steel or aluminum. Shield not to be mounted to axle ends or hub bolts. A hole may be cut in one to allow locking in of hubs.
  21. No cast iron clutches or flywheels permitted, must be SFI approved.
  22. SFI bellhousing blankets and/or SFI blow proof bellhousing required.
  23. All U-joints must be shielded 360 degrees with 3/8” thick aluminum with 1/8” steel liner or 5/16” thick steel. Shield will be 6 inches long minimum and centered on u-joint. Inside diameter of shield will be no more than 2 inches larger than u-joint.
  24. All intermediate shafts between the transmission and transfer case will be totally enclosed in 3/8” aluminum or 5/16” steel, 1/4” of shaft may be visible.
  25. Fire extinguisher (2.5#) or fire suppression system, Helmets—Snell 90 or better, SFI fire suits, fire gloves, fire shoes or leather shoes and seatbelts required.