Originally Posted by Frank L

Tune to smoke and performance every time will always yield the best results. I have broke in 2 GRP's recently, both are under a gallon and they both run at 210 - 225 when they come off the track even after a 30 min main. People say it isn't ok for these engines to run above 200, i disagree. My last GRP ran at the same 200 - 220 and was going strong after 7 gal. I tune to temp and performance and it has never failed me yet. 2 of the same engine will tune differently and temp differently, as long as these engines dont get excessively hot, and you will know because they will have a lean bog or a lean idle, then you are ok. Smoke and performance every time if some guy at the track says thats too hot just nod and smile. Everyone has an opinion and this is mine.