Originally Posted by
crapshooter
remember this aswell, if you like to use high nitro in your fuel mix you must also change the head clearance or the engine will detonate which will ruin the piston crown and cylinder head button. oh and glowplugs will be ruined .
Do you mean say an extra .010 shim to run 50%, or is there some rule of thumb. It would break my heart to burn up this pretty Rossi motor. I'm going to stick with 25% for now. Heck, that might be plenty fast for me.