2008 Southern Invitational
8,000 lb Pro Stock Diesel Truck Rules
Class will run at 8000 lbs. Trucks must remain stock appearing.
Maximum engine size will be 460 cubic inches. Engine must come from factory in one ton or smaller pickup truck. Engine must remain in stock location as intended by manufacturer.
Hook point must be no closer than 48" of centerline of rear axle, hitch height maximum of 26", with a minimum of a 3" opening. Hitch point must be easily accessed. No "trick" type hitches permitted. Hitch must be stationary in all directions.
One turbo with one pressure stage permitted. Maximum of 3.0" opening on intake wheel. Turbo mounting plates are permitted.
Exhaust must have (2) -3/8" inch bolts mounted in a cross pattern.
No cast iron clutches or flywheels permitted.
Fuel safety kill and/or air shutoff must be installed on rear of truck. Kill switch will be securely mounted to the back of the vehicle and have a two (2) inch diameter ring to attach the sled.
No fuel lines may be inside of truck cab.
Computer chips and boxes permitted.
Mechanical or electronic fuel injection permitted.
Must be D.O.T. approved tire. Maximum tire height 35". No studded tires or chains. No alteration to tires allowed. No bar or terra tires. Dual rear wheels are permitted.
Water injection permitted.
Front weights must be no more than 60" from the center line of the front axle to forward most point and be securely fastened.
Fuel limited to Diesel fuel and Bio-diesel only. No alcohol, nitrous, propane or any oxygen enhancing agents allowed.
Drive train will consist of the following: Any front axle, any transfer case, any rear axle. No planetaries permitted.
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.
S.F.I Bell housing Blankets and/or S.F.I Blow proof Bell housings required
All U-joints must be shielded 360 degrees with 3/8" thick aluminum or 5/16" thick steel. Shield will be 6 inches long minimum and centered on U-joint. Inside diameter of shield will no more than 2 inches larger than U-joint.
All intermediate shafts between the transmission and transfer case will be totally enclosed in 3/8" aluminum or 5/16" steel, ¼ of shaft may be visible.
Solid rear suspension is permitted.
Fire Extinguishers, helmets, and seatbelts required.