If money isn't as much of an object, you can have Dub Jett build you an engine. I think his smallest engine is a .25, but he can build it to the specs you supply. Dubjett.com The .35 is a .25 case engine and makes heaps of power. If you opt for the LX setup, it will have higher timing and run faster. You can get it with a tuned muffler that will get you within 500rpm of what a full pipe will do.
The only advantages that a car engine is going to have over an airplane engine is better breathing and higher timing.
Last edited by 1QwkSport2.5r; 02-26-2017 at 09:27 AM.