ORIGINAL: XJet
ORIGINAL: show871
I run 15% nitro 20% 100%syn oil
How did I know that'd be the case? :-)
You're killing that engine with 100% synthetic oil -- you *MUST* use some castor if you want it to last and perform reliably. It won't take much to change to a fuel with at least some castor in it -- try some 10% Omega. You might be very surprised at the results.
I bought it used, and it has a swept bact after market pipe on it
Sounds like a Mac's pipe perhaps? Try ditching that and fitting a Tower/GMS47 muffler. These will add up to 1000 RPMs over the stock TT muffler and make for a very sweet-running engine.
I will try a change in fuel too!