Racing Fuel?
#2
If you're car is tuned for 91, I'd use 91. Don't waste your money on 101 octane pump gas - if your car is not tuned for it, you're wasting your money. There won't be any notable performance gains.
#3
But the higher the octane the less the motor will have to retard the timing when heat soak happens...decreases chance of detonation but again like the above said get a race tune for 100 octane....just the different fuel with help greatly with preventing denotation and even more timing advance and few more ponies at the same psi!
#4
if your motor is not being retarded due to knock, and if you are not having any detonation issues, run the lower octane/correct octane for your motor/tune, save the money you normaly will not see any improvement from running a higher grade of fuel.
Now having said that my tune is for 93, and normaly i run 93, but next weekend at the drags i am planning on runing 1/4 of a tank of 93 and 1/4 of a tank of 101 Super ++ from shell, dont know if it will help at all, but i know it wont hurt any thing.
Now having said that my tune is for 93, and normaly i run 93, but next weekend at the drags i am planning on runing 1/4 of a tank of 93 and 1/4 of a tank of 101 Super ++ from shell, dont know if it will help at all, but i know it wont hurt any thing.
#6
If you had 12 to 1 compression ,a high lift radical cam maybe then it would be required but your engine/heads doesn't have enough time to burn 101 octane. We should be so lucky to run the lower octane fuel with heads that flow and engines that think for themselves.
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