The last time at the track my car made a very loud pop just before the 1-2 shift. I immediately backed off the throttle. I looked over everything thoroughly but could find nothing wrong. The car runs great. Idles smoothly, no smoke, not burning or blowing out any oil or water. Originally I thought the worse, Blown head gasket. At the time this happened I was running 112oct race fuel and about 25psi boost. Other than scaring the blank out of me there are no physical signs of damage. does anyone have any idea what could have happened? Are there things I can check for?