Stealth....you are talking about the WAR series here in Missouri.... our tracks go dryslick 99% of the time and any engine that pulls from 3-7000 RPM is competitive wingless in that series....but even then the guys with 305s have to be absolutely perfect through 50 corner entries, middles and exits to run up front....tires and shocks have gotten pretty good at letting you use more horsepower when it slicks off than you used to be able to use.