That's starting to be quite appealing now. Of course this means that I'll be truly normalizing the engine, rather than trying to make any boost above sea level. Let's see, 200+ HP at 18,000 ft, in an RV-3 :-) Rusty Turbo 13B powered RV-3...Be more afraid than ever :-) 1993 RX-7 R1... Mods underway, tickets to follow PS- Yes, I am nuts :-)