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Originally Posted by Power Surge
Optimum A/F for a naturally asperated pump gas motor is in the 12.8-13.2 range. Any higher than that is too lean. For forced induction or nitrous, it's 11.8-12.2. That might be what they are used to. Little turbo motors.
One more thing... what trans do you have, and what gear did they pull the car in? You want to have the car pulled in 4th (that's 1:1 on both a toploader and 5 speed). If they pulled the car in 3rd or 2nd (common in some shops), you will have much lower numbers.
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They pulled it in 4th gear up to 7000rpm. It's a 5 gear setup from Richmond. It hit 140mph at 6800rpm in 4th gear. Thats what they showed me....
Keith