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I think you will be running ORVTPA, HERE ARE THE RULES!
1} Cubic inch (A) Diesel Engine- 470 (  Spark ignition on alcohol-370
(C) Spark ignition on gasoline naturally aspirated-850, there will be no 850 cid naturally aspirated tractors allowed in the class after the 1 competitor now competing (David Bewley) rebuild 2} A1% tolerance will be given on cubic inch limitations to allow for normal engine wear {a) All engines will be checked for cubic inch before the first pull 3} No V-8 engines permitted 4} Cast iron OEM cylinder heads only, cylinder head must match block 5} Cylinder heads limited to 2 valves per cylinder 6} Engine must match brand of tractor 7} No intercoolers and/or after coolers allowed 8} Rear of engine must be in stock location for make and model of rear end and transmission housing, maximum 1-inch adapter plate 9} No super chargers allowed 10} Single turbo charger of a size not to exceed a 3-inch diameter measured at the front face of the wheel with one single air inlet with no additional openings in compressor housing outside of the 3 inch inlet (a) Compressor wheel must enter into the compressor housing (b) No MAF enhancement, all plugs will be welded non- removable 11} No fuel injection pump larger than a 6- cylinder P series pump will be accepted 12} Water injection allowed with oil lubricant only, no additives allowed in injection water Frame 1} Maximum length 13 feet measured from center of rear axle to forward most point excluding tow hook 2} Maximum wheelbase 114 inches 3} OEM tractor rear end and transmission housings only will be accepted, no component tractors allowed 4} Hitch will be no SHORTER than 18 inches measured from the center of the rear axle to the hooking point. 5} Maximum hitch height 20 inches Tires 1} Maximum tire size 30.5x 32 2} Minimum tire size 18.4x 38 Fuel 1} Acceptable fuels are diesel fuel, alcohol, and gasoline 2} No oxygen carriers or combustion accelerators will be permitted 3} No Ether starting aid can be on the tractor Weight 1} Weight for the class is 6000 pounds with no tolerance given at time of weigh in 2} All tractors must carry at least 200 pounds of moveable weight |
