I have 11.1 to 1 now, I had 11.3 to 1 with different heads and compression..
I would add one gallon of 110 Sunoco to every 4 gallons of 91 non-ethanol and that seemed to work pretty well. I would just keep a little 2 gallon can of Sunoco in the trunk strap down. it was mostly due to when I shut the car off it would want to diesel on.. I bought some torco octane boosting additive that I want to try. It's not dirt cheap but it does seem to pan out price wise better than adding race gas and one hell of a lot easier to carry around.... Be looking forward to see how it works this summer...
