Quote:
Originally Posted by 98intrigue
Yes, my tuner said that he's seen 12.8 to be the sweet spot. I remember looking at the UpRev window and seeing the fuel right st 12.8, so I'm not sure why the graph shows 13.2.
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Quote:
Originally Posted by esfourteen
it was probably reading from the exhaust tip which usually reads a bit leaner
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That's absolutely correct... When you have cats and you're measuring air/fuel from the exhaust tip, more air then fuel is going to make it out of the car which is why the graph will read leaner because the tuner is compensating.