In my 91 mustang lx we ran 12 degrees timing and 93 octane gas and that is where it ran best at, with octane boost it worked best at 14 degrees timing.
That is where we got the best times at the track; and I have to agree with everybody, your throttle body is too big.
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James Cox
nochevy@hotmail.com
1991 Mustang LX
12.565 @109.38mph 1.764 60ft