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there's no def answer...the free'r flowing your exhaust gases are, the leaner you'll be. If you're 12.5:1 now, you could see up to a point and a half higher which means you'll need to pull more timing...what are you boosting, 8lbs?
have you had it tuned? Also, are you reading AF from the tail-pipe or cat? I've seen up to half a point dif between the two. Richer at the cat than at the tail-pipe.
there's no def answer...the free'r flowing your exhaust gases are, the leaner you'll be. If you're 12.5:1 now, you could see up to a point and a half higher which means you'll need to pull more timing...what are you boosting, 8lbs?
What we dont know is he coming from stock cats to test pipes......if he is he will def run lean......at least that is what my tuner said and i trust his knowledge.
11-02-2007, 11:55 AM
