I have been using Tuner Cat software with great results at part throttle. My scanner indicates O2 readings of 960-980 mV at WOT accross the RPM range. This seems a bit rich to me. I have been subtracting fuel in these areas with no noticeable difference. I have been making small changes to keep from getting carried away but so far I have subtracted a total of 5% of fuel at 95-100 KPA. My 92 vette is fairly stock. Is more than 5% normally required to bring the O2 sensor readings down to the high 800 mV range? The changes that I have made at part throttle were small but very noticeable and I am sure that my car and equipment is in good working order. Any input would be great. Thanks

 

If you are concerned with WOT you may want to try subtracting fuel from the WOT PE vs RPM table.

Tim

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TRAXION's 1990 IROC-Z
Best Time = 12.244 @ 112.51mph (1.778 60' / 7.819@88.32mph in the 1/8)
All Natural. No Force. No Drugs. Stock Bottom End. Stock Body Panels.
Gunning for NA 11's with bigger cam, bigger stall, and bigger exhaust.
-=ICON Motorsports=-
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