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AFR reading

Old 11-11-2009, 01:00 PM
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you want to be around the 12.5:1 mark.

Theoretically you could go to 13 or 14 and make more power but you're on a thin line. It's best to keep it in the 12 range to keep the heat down.
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Old 11-16-2009, 04:27 PM
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I ve read numerous articles on this and the concensus seems to be, don't go past 13.5. any leaner and you could damage your engine. i install a vafc and got tuned to 13.5 @ wot. before the vafc, i've got i\bbtb and was running between 11 and 12 afr factory. stock ecu's will compensate some for bolt-ons, hence forth learning ecu. seen this on the dyno. if your really concerned, have it dynoed. that might ease your mind on this matter.
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Old 11-16-2009, 05:47 PM
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Yeah, I went a step further and acquired an EMU
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Old 11-17-2009, 12:03 AM
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In WOT anything leaner than 13.2 is bad (ie melt piston bad ) the best range for power is 12.7 - 13.2.

With my vafc2 it hover around 13.0 to 13.1 in WOT

I cry when i see people tuning and its highier than 13.2
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Old 11-23-2009, 06:32 PM
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very helpful . one question , vafc can only tune for wot right? on a budget, but a greddy ultimate would be better tahn a neo ? cause sometimes they are found for the same price lol
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