Reeds vapor pressure is the first thing that comes to my mind with AV gas. Discluding octane and lead issues, the stuff is ment to be run at altitude, not sea level. Airplane engines and what we race are very different in design. They run valve seats 2-3 times as wide as we do with spring pressures well under what we run.
Bing-go.... yes guys run it on the street but usually with lower compression thinking its better... hard seats can use the no lead... if you need lead... you better add it
