HoosierContour, I read your post over there.
0.935 volts is NOT necessarily 12.5:1 A/F. Stock O2's are not a reliable means of measuring air/fuel ratio unless you are trying to measure 14.7:1. If I tune to 0.935, I foul the heck out of my plugs (i.e. WAY too rich). Need a wideband O2 and a dyno to do it right.