Compact Diesel Pro Stock Class Rules

       (1) Engine will be no more than 3 cylinders. May be liquid or air cooled.

(2) Engine will be no more than 75 cubic inches

(3) Water injection will be allowed.

(4) Engine modifications are permitted = Rods, Pistons, Cam, Fuel system.

(5)Head work is permitted on stock heads. No Billet heads. No overhead cams.

(6) Injector and injector pump modifications allowed. No Billet injector pumps.

(7) Turbo charging is permitted, but limited to one turbo only.

Turbo will be fitted with a shut down guillotine on the compressor inlet side of the turbo.

Exhaust “L” of turbo must have minimum of 5/16 cross in elbow with exhaust to discharge vertically

(8) Electric fuel supply pump is permitted with positive power wire to have a                         disconnect at rear of tractor

(9) No propane or nitrous of any kind will be permitted.

(10)Stock frames or stock appearing frame rails with full hood,

        grill and side shields will be permitted- No tube frames__ __

Chassis may be modified to accept engine.

(11) Must use a lawn mower rear end / transaxle.

= No cut down automotive rear ends or Panzers

(12) Full metal side shields to cover engine area (minimum 16 gauges)

(13) Must run 5/16” cable around oil pan over top of valve cover in a complete circle connected with cable clamps

(14) Must run steel fly wheel

(15) Clutch assembly and fly wheel must be surrounded 360 degrees with 1/8”                metal or 3/8” aluminum

(16)  56” wheel base max.

(17) 7 feet from center of rear axle to front most portion of weights

(18) 13” hitch height.

(19) 26” x 12 x 12 tires max.

(20) 1050 lbs./1150Ibs.Weight class.

(21) Dead man throttle required.

(22) Kill switch device mounted on rear of tractor must disconnect power to electric fuel pump along with activating turbo guillotine

(23) Min. of 1 lbs fire extinguisher required.

(24) Wheelie bars are required.= Same specs. As all other classes.

         (25)  Engine must have block casting  model and serial numbers, not ground off

 (26) Full faced helmet required

 (27) Engine should have OEM intake manifolds and exhaust manifolds, polishing is permitted                                                                                                                                                                                                                                                                                                                                                                                                        

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Special Note:

Hilliard  Tractor Club reserves the rights to change or modify  these rules at any time  to promote fairness and safety