Got a question, a lot of people are really concerned about having the a/f mix at 11.5 to 11.8 when they are getting dyno'ed. Now, from what i understand, the best place to read this is before the cats. If you are taking the reading after the cats(o2 bung or at the tailpipe) don't you have to take into concideration that the cats are eating up some of the fuel therefore if you are taking your reading at those points and you are at 11.8, you are actually runnig a little rich. see what i'm saying? a guy that is running straight x pipes with no cats and a guy running cat being read at the tailpipe should not both be equal in A/F readings.
:shrug:
:shrug: