I need some help. I have seen many dyno graphs on this website and people critisize the a/f curve but i have never seen anyone say what the right a/f curve is. I have searched for "a/f" and "a/f ratio" and everythig but i could not find it. So my question is, what should the a/f ratio be on a turbo b-series? All i need is a simple answers from a few reputable people. thanks a lot.

 

A safe ratio is 12:1 or under when under WOT boost. Anything from 11.5-12:1 should be fine. Just remember its not just the AF ratio that can kill your motor. Timing can also.

 

14.5 or so at idle and part throttle, 13:1 or so at 0vac, and 12:1 or so in boost, is a pretty safe bet.