joffthegoth

hi kinda new to the forum and need a bit of help. i have a savage 21 and have upgraded the engine and various parts. i have just bought a nitro star f4.1 engine which i plan to run on 30% nitro methane. what sort of plug do i need, also will i need to lower the compression ratio of my engine. i am a fully qulified mechanic so dont be to afraid to be all technical on me. thanks to anyone who replys to this thread