12,500 12 and 15 MPH

12500 12 and 15 mph Rules

  1. Engine- Tractors must have the correct engine for that make and model
  1. No cube limit
  2. No water injection
  3. 2800 RPM maximum
  4. No intercooler/aftercooler
  5. OEM manifolds only
  6. Maximum 2 valves per cylinder

2. Fuel- Diesel Fuel only

  1. Maximum size injection pumps will be P3000
  2. Maximum plunger size 13mm one plunger per cylinder
  3. No electronic controlled fuel delivery devices
  4. Must have a 3-way dump valve

3. Chassis-

  1. No component tractors allowed
  2. 20” drawbar Maximum height, 18” from center of the rear axle
  3. Hitches must not exceed 10 degree pitch/angle
  4. Hitches must be rigid (No floating hitches)
  5. No weights to extend 2 foot past the furthest most point of the tractor
  6. Must have front hitch (Front hitch will not be included in 2’ length)
  7. Wheelie bars, Tie bars, ROPS will be required
  8. Factory frame rails must be used
  9. Engine,transmission, and rear end must match Manufactured hoods for that tractor
  10. All Tractors must have .060 (14 Gauge)  thick side shields that extend from the front most part of the engine to the bellhousing. No Aluminum side shields. 

4. Transmission

  1. No aftermarket transmission allowed

5. RPM- All tractors must have a ISSPRO part number 019R8906 magnetic pickup attached to the front of the engine. RPM plug to be easily accessible to directors at the rear of the tractor.

6. Tires- 20.8-38 520/85R38 or 18.4-42 480/80R42 Maximum tire size

  1. Top cut tires allowed
  2. No Front cut tires allowed 
  3. Top Cut is not to extend into the body of the tire
  4. Rear tires must run within the rear tire track
  5. No Purpose Built Pulling tires

7. Safety-

  1. Dead man throttle
  2. ROPS
  3. Seat belt
  4. Intake Air shut off
  5. Tie bars
  6. Wheelie Bars
  7. Exhaust Containment device
  8. Exhaust bolts
  9. 3-way Dump valve
  10. Compressor Blanket
  11. Side Shields
  12. Fire Extinguisher