Engines can be interchanged between Dodge, Ford, and GM, as long as they came in a one ton truck or less from the factory. Engine must maintain stock appearance unless otherwise noted in these rules. Aftermarket intake manifolds are allowed. Engines must have an SFI approved balancer. All engines are required to have an air shutoff (rain cap or guillotine type) on the inlet side of the turbo. It must be spring loaded, so that when tripped all air is shutoff to the engine. It must be cable operated, with an eyelet near the hook point at rear of truck, so if pulled, shutoff will be tripped. No electronic kill devices will be accepted in place of a guillotine or rain cap. Water injection is prohibited, and all system components must be removed from vehicle. Ice water intercoolers are allowed. Fuel injection pump is limited to a stock-appearing, model specific pump only. The use of multiple high-pressure common-rail fuel pumps is legal. Powerstroke engines with a single factory turbo may utilize a second HPOP. Pumps from different years in the same engine model may be interchanged. P7100 pumps are allowed to run RSV ag governors. Fuel must be pump diesel, no propane or N02 permitted or any other oxygen enhancers.
