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Modified Farm Tractors

3.   1.      Tech and rep decisions are final. Tractors may be inspected at any event.

2.      Tractors must be brought for inspection before first pull.

3.      One grace pull for Non-Circuit pullers.

4.      No four wheel drive or dual wheels allowed.

5.      All pulling tractors are allowed to move up one class only.

6.      Maximum engine displacement is 540 cu. in. Engine must be stock block for that model tractor with stock style head, intake and exhaust systems, excluding filter and muffler.

7.      Injection pump must be OEM stock appearing for that model with no visible modifications.

8.      One turbocharger only allowed with stock footprint. The use of an adapter plate is permitted to reposition the charger if necessary. The turbo must not be exposed. Engines up to 470 cu. in. are limited in turbo size to 2¾” inlet and 3½” outlet. Engines between 471 cu. in and 540 cu. in. are limited to 2¼” inlet and 3” outlet as measured at the smallest diameter in housings.

9.      No water injection or mixing of fuels.

10.  The addition of one lift pump is allowed.

11.  If a steel fan is used engine side shields must be installed. (See Pro-Stock rule 9) Electric fans are recommended.

12.  Tractor exhaust systems with no muffler must be pointed straight up. Turbo tractors must have 2 Grade 5 3/8” bolts in the vertical portion of the pipe installed at 90 degrees and within 1” of each other.

13.  Tractors must have a hood, floorboards, fenders, grill, frame rails, transmission housing and rear end for that model tractor. Tires and wheels may be changed. All components used must be in their original position.

14.  Maximum drawbar height is 20” to the top of the hitching device. Minimum drawbar length is 18” from the centre of the rear axle to the point of hook. (See General Rules - Vehicles) D-ring hitch made of 1” steel with 3” hole.

15.  Maximum RPM is 3100. Tractors are to be equipped with a single magnet pickup installed on the engine front balancer or on the flywheel and wired to the rear of the tractor. All tractors will have their senders connected to the remote tachometer on the sled at every pull.

16.  No weights behind the rear axle. Weights can be added to the rear wheel centres. All weights must be secured on brackets and not on the platform.

17.  Air shutoffs are required and a connection located at the rear centre of the tractor. When pulled it must limit the air going into the intake of the tractor. Air shutoffs must be able to be engaged from the rear of the tractor and by the operator of the tractor when sitting in the seat. A fuel shutoff must be installed and be abled to be operated when in the driver's seat.

18.  Wide front axles only. No tricycles.

19.  “Wheelie Bars” are required. Bars must extend 2” beyond the edge of the rear tires. Stabilizer pads must be a minimum of 24” from the outside of one to the outside of the other, a minimum of 24 sq. in. each and a maximum height of 8” off the ground when parked on a flat surface. Vertical bars are to extend up from the rear edge of the pad a minimum of 12” and are to be of equal strength material to the rest of the bars. Bars are to be capable of supporting the tractor’s weight in the heaviest class entered. No wheels allowed.

20.  All tractors must have a functioning seat belt and seat belt must be worn while hooked to the pulling sled.

21.  Any power shift transmission with more then one shift (up and back i.e. Dual power or T.A.) requires an approved scatter blanket.

22.  A driver must be in the seat while the tractor is running.