>I think you are wrong. There are no adjusted displacement
>caps for G5 or Open.
Adjusted displacement cap of 5100cc. With modifiers, that means 3000cc maximum for turbocharged engines, 6375cc for pushrod engines, or 3750cc for turbocharged pushrod engines. (So that Buick Grand National you've always wanted to rally is 36cc over the limit, but feel free to run your 383ci Dodge Charger, as long as you paint it orange with the stars-n-bars on the roof :+ ) The rotary multiplier is kind of a joke because there's for all intents and purposes only one manufacturer of rotaries, and the largest engine (1962cc unadjusted) can only be run naturally aspirated (3532cc adjustment before forced induction) and weighs-in heavier than sin itself, so really there'd be zero advantage given that turbocharged two rotor engines of any size would run rings around it and weigh less while doing it.