Originally posted by sean
i have been doing a little more experimenting and getting some better results,although my TR still wants to be a little on the hot side for the best performance. this may sound like a really stupid question and i think i know the answer but i will ask anyway. if i ran 30% nitro would i be better off as far as temp? i was thinking that with a higher nitro content i could put more fuel through the engine(run it richer) hoping that maybe the increased fuel through the engine would help keep it cooler-yet not bogg it down because i have a higher nitro content which burns better? i dont know, just a thought
My suggestion would be to check your head shimming. Sometimes having to much or to little head clearance can generate heat.
For a .12 engine on 30% nitro, the ideal head clearance should be .021 inch. For 20% nitro it should be .017 inch.
Measure the recess distance between top of cylinder sleeve and piston at TDC, then measure actual head recess distance between chamber and shim surface, then subtract those to measurements and put appropiate shim to get suggested total head clearance.
AFM