.15 nitro engines

[joeyb19]

hey guys, i was wondering if there was anything that could be done to these engines, or what the "big guys" do to their engines to make them faster? i have been building engines for race cars, go-karts, etc. for a long time on the side, but didnt know what people do to get the most out of what they have..carb work, head work, cranks etc. if anyone knows, please get back with me. also if you dont want to let the "secrets" out here u can either pm me or send me an e-mail at joseph.brown@chesterfieldpolice.com

thanks for your time,

Joey