When I was building "claimer" engines with "9:1" compression ratios (Actually about 10.5:1 after some sneaky angle milling) for the Nashville Fairgrounds oval track, the track management in its infinite wisdom (translation: "Greed") insisted that all the competitors buy their gas at the track- - - -"Pure Firebird Racing Gas" which was 106 Octane and cost nearly $4.00 a gallon. It was dyed a funky-looking blue color so a sample taken from a fuel cell could be readily identified. The engines ran really lousy on the stuff! By some dyno testing we discovered that premium-grade street gas with a little Diesel fuel added made my engines run a lot better that the track gas, so we only bought enough of the stuff at the track to leave a paper trail, and used machinists' blue Dykem to color our preferred fuel mixture. Like Smokey Yunick used to say, "It's only cheatin' if ya get caught!"
LOL!
Jerry
