Pinging

When our cars were built you could buy Sunoco 260 at the pump with an octane rating of 100, which at the time was considered premium. The low octane gas was around 91 octane which would still support 9-1 compression. Gas is pretty crappy today but cr`s are running as low as in the 7.s-1. Running a little better gas is an inexpensive way to avoid fuel related spark knock which can ruin an engine. You`ll get it right and be laying down tracks before you know it.:burnout:Let us know how it comes out!