Quote:
Originally Posted by s1ngletracker
ah yeah, good call. I just don't know how to convert voltage to A/F... any idea?
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You can't convert volts to A/F without a wideband gauge. .5v on a narrowband is 14.7:1, it is only accurate right around .5v. The stock ECU and stock narrowband O2 only care if it's richer or leaner than .5v/14.7, not by how much.
The dummy gauges don't read in A/F either. They just have huge ranges covering rich, stoich, and lean.
But any ways, your O2 volts should be like .92-.98 under boost, unless you have a 1990. And even with a perfectly flat wideband A/F of like 11.0:1, your O2 volts will change, instead of holding a consistant .96v or whatever. You could have a perfect A/F and your volts might go from .90 to 1.00 across the RPMs. So they are almost useless for tuning outside of idle/cruise.