Without a major reconfiguring of the engine layout (reducing compression etc. etc.) you are not gonna get a whole lot from either approach. You are limited to maybe 5lbs. of boost...tops. 20 or 30 hp. at best. Good thing too...the theoretical limits of this tranny is South of 300hp.---the practical limits are much lower. Three grand for twenty horses isn't much of a horsepower bargain in my book. Chopper