OK, I have a CT racing 440ex engine and the compression is 13.5:1 and runs on race fuel, it as loads of power but im not spending $3.00 a gallon on gas. what is the highest compression piston I can get away with on 93 octane below 4000 feet? Also, what is the best piston to go with? post a link if you know one that will suit my needs.

 

11:1 is about it. Anymore than that and you will get into detonation problems with pump gas.

 

where do you buy race fuel at?

 

ok, looks like im gonna have to go with a 11:1 piston, now the engine i have has 15 hours on the rebuild and i was wondering if i could get away with buying a nw piston/rings and just istall it without honing

 

That would be a no no!! New rings cant seat correctly without crosshatch... Even with only 15 hours on it i bet that bore has some glazing... Remember when you cut corners it comes back to bite you in your a$$ later...

 

Nothing over 11.5:1 will run on 93 pump gas.

 

hey 420ex, i noticed in ur profile that u have wheel spacers on the back, what do u think of those where they worth the money?