Here is what I've been pondering on for a set of rules:
2.5 Inducer. Inducer bore will be checked with a 2.55 plug (same as old years past) at the initial event that the driver and truck attends. Turbo must be a small frame. Only frame sizes accepted are S300, HTB2, HX50, GT40, (and any others I have missed). Turbo must have frame size tag. No Clipped wheels, bushings, or stepped covers. Maximum compressor wheel will be 64mm inducer diameter and 91mm over all diameter. Factory MWE groove allowed no larger than .200" and must be behind the face of the compressor wheel. Any non members finishing 1st place must remove compressor cover for inspection of the turbo. Any paid members will be inspected only under a protest. $75 protest fee on turbo chargers. 08+ Ford trucks allowed to run Factory twin turbo configuration.
Single Injection pump. No dual CP3's. P-pump engines limited to 12mm plunger and barrels (would be checked under a protest for a $100 fee). Dual High Pressure oil pumps allowed on the 7.3L Powerstrokes. P-pump 24v allowed.
Electronic controlled engine must use the Factory ECM. No stand-alone/aftermarket units. Any Boxes, Chips and Programmers allowed with the factory electronic systems.
Factory Cylinder heads only. Cummins engines must have factory casted intake plenum in place and must not have been cut off previously and rewelded or bolted back in place. All other engines must use the stock intake manifold(s)/plenum(s).
Exhaust must exit straight up or down behind the cab. No hood stacks.
Front Hanging weight allowed. 8200lb maximum with driver.
Traction bars allowed and rear suspension can be blocked, but must me easily removed. Factory suspension configurations only.
Reece style hitches only. May be braced but no part of hitch or braces forward of the centor of the rear axel.
Must have full interior. All base model accessories must be inplace and functional (Power Steering, alternator, water pump, HVAC system, ect)