pump gas
thanks for more information. yes you can run 11-1 with aluminum heads on the street. theres always somebody that will say they are running 12 or 13-1 comp on the street and have no problems. first is to know what the "true" comp really is. If race fuel is that high you might want to buy some in the states. I know of a shop in greatfalls montana. again I ask you, with all the money you have spent on your engine and drive train, why cheapen up on fuel? one final thought, av-gas is made to work in modern airplanes that have 7-1 compression and run at 2300rpm. does that sound like your motor? :roll: for every guy I hear says they run "it" with no problems I have seen broken parts, rings that dont seal,etc. the dyno doesnt lie, race fuel builds more power. :!: