Originally posted by gentleman81
so whats the key to getting the best performance out of the new sirios, i have the 3p version. i race another guy with an older sirio and it screams, mine is not too shabby but i can tell that its can be faster. i think i run it too rich over all but it gets very hot sometimes i dont want to toast my motor, be ther done that, ot fun. he has a aftermarktet head on his and it is running way cooler than mine but thats not the whole fix im sure.
How hot.
Sirios like to work at their best around 250ºF, but also you must have your car properly geared. If you have it to long geared in a short track, engine will heat up and vicecersa.
Standard cooling head from the EVO2 is enough.
AFM