Originally Posted by
teamreidy
Is it common for these motors to run hotter then 170 to 190 range during the first gallon? i did the heat cycle break in and when i start to tune for race settings it runs great but temps are in the 212 to 220 range i have about 3/4 of a gallon on it with byrons 20% race 12% oil it has good smoke just curious if temps will start to drop after a gallon or so. i reallly dont want to hurt this motor i love it so far
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.