detonation overheating many things. What symptoms did you have.Turbo Matty P said:My headgasket was in pieces. I am wondering why yours holds at 20psi and mine goes at 11-14??
ANy time you are tuned improperly you raise the risk of high egt's, high cylinder pressures, detonation, preignition, etc.
Even faulty tolerance checks from the factory. Many things.