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Originally Posted by jetpilot
so 14.0 is running lean or rich? and any suggestion on which fpr to get?
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Super lean for wide open throttle high load conditions. But your readings are probly from the dyno jet and not accurate.
SR20's with stock compression make the best power at 13.2:1 or so. This does not give you much safety margin. High compression SR's seem to like about 12.7:1 or so and hardly gain anything when you lean them out.
Mike
