Quote Originally Posted by Crapdaz View Post
anyhow what is the best air/fuel ratio?
or how does it work? and do you know from the top of your head what stock AF is?
14.7:1 is stoichiometric. My opinion is that you should max at 13.5:1 at full throttle for power unless you are doing a racing car where you will be checking pistons after every few races. When cruising, then the A/F ratio goes closer to 14.7:1. Other engines like in the Jazz can run higher than 14.7:1 when cruising. I think. I have run on 2 different dynos, car was the same both times. One returned 10.5:1, while the other said 12.5:1 with a dip to 11.8:1 around 5000-6000rpm. So I can't tell which is the proper A/F that the stock car is meant to have!