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Dfink wrote,
Problem is I have no idea what a/f mixture was peak
14.7:1 is peak. Lean= higher temp is only true when you are rich of stoich.
Some of your comments do not make sense to me. Are you adjusting injector pulsewidth or a closed loop AFR target ? No system can hold an AFR under cruise, only dither back and forth over a target. You usually have to look at the correction table and dial in the pulsewidth to get the correction factor below 5%. Have you verified with a timing light that what the computer knows as TDC actually is TDC ? The best AFR for WOT under load can only be determined by max output on a dyno or with a stopwatch. Low 13's is usually LBT, anything in the 12's is a safety factor for cooling, nothing below 14.1 actually burns. You seem to be searching for a set of "ideal" specific numbers and it just doesn't work that way in my experience. If you are tuning a road car exempt from emissions, you want a steady idle, good throttle response, a lean cruise with a lot of load based ignition timing (like vacuum advance) and a safe AFR under WOT. The reason full load AFR is discussed more, it that it is really the only time it matters.
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Paul
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