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Originally Posted by JAAY
I've tuned for 12.3-12.5s cruise you will see 14.6 as for were in closed loop. I hope this helps you.
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12.3 seems a bit rich for steady cruise in an NA car. Is your fuel economy suffering? I tune motorcycles and generally mid 13's are preferred. Throttle response is good and fuel economy isnt terrible at that range.
The stock target of 14.6-14.7 is good for economy of course but doesnt give the best throttle response. The surging you get at this lean of a ratio is pronounced on a bike, but its harder to feel in a car. I wonder if leaning it out a bit to 13.5-13.7 would help you get some mileage back without sacrificing drivability.