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8500 lb Pro Farm Tractors

8500 Lbs. Pro-Farm Tractors


1. Tractor must retain stock appearance and sheet metal in stock location. Allow for updates.

2. Deflection shield must be on both sides of the motor and cover the entire motor. Either aluminum or steel no less than 0.060 thick. Fire shield between torque and driver.

3. Clutches must be covered with 6 buckle SFI safety blanket.

4. Fenders or tire shields are required.

5. Must have cross in outlet on turbo two 3/8 bolts or rods, no more than 1 inch apart.

6. Front weights must not extend no more than 13 feet from the center of rear axle, 114 inch maximum wheelbase.

7. Tractors must have individual working rear brakes.

8. Drawbar must be stationary and no higher than 20 inches and 18 inches from center of rear axle.

9. Motors must not exceed 470 cubic inches. 1% TOLERANCE AND MUST BE DIESEL ONLY.

10. Engine must match tractor.  Must be OEM head.

11. Aluminum heads are not allowed.  Only 2 valves per cylinder.

12. No compressed air, no nitrous oxide or fuel conversions, no propane, and no nitro methane allowed.

13. Maximum tire size is 20.8x38 radial or bias ply tire, single or double cut tire allowed. Tire can be uncut.

14. Fuel pump, any pump, maximum P pump.

15. Water injection is allowed, no power additives (water only with the exception of lubricant).

16. OEM intakes and exhaust manifolds only, no homemade manifolds, no intakes or housings.

17. All tractors must have wheelie bars, air shut off and spring loaded throttle stop.

18. Intake housing to be no larger than 3 inches at the face of the wheel. Single compressor wheel must protrude into 3 inch bore. Stock map with enhancement is allowed.

19. No component tractors allowed.

20. No inter coolers or after coolers allowed.

21. KTPA approved roll cage.

22. 5 point harness with quick release clasp is required.

23. Quick release steering wheel.

24. SFI approved clutch, flywheel and pressure plate.

25. Head restraint must be a minimum 3/8 inch cable with 2 clamps on each end. Strap needs to be across front part of head.

26. Turbo and fuel (by Styrofoam test within 3 minutes of finished run) will be randomly checked at each event by number draw. 

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Melanie Wiley,
Oct 23, 2017, 9:55 AM
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