reddevil said:I use 91 octane and add a gallon of tolulene (114 octane) into everytank A gallon of tolulene bought in bulk is about $6 per gallon, so the average price per gallon I am paying is about $2.60 per gallon, and at 15 mph it is getting spendy. However, I don't want to blow ahole in another piston. I am pushing about 7-8 psi on a 1990 NA 2.2 via an Eaton m62 supercharger, walbro pump, MSD rrfpr and an AWIC.
How many miles u got on the engine? Maybe you wouldn't detonate if you had some MSD ingnition and/or timing control in the mix...just a thought. Always been a MSD fan....or was it LSD? Whatever :screwy: