Quote:
Originally Posted by Zsteve
so semtex is your AFR starting at 14 and then at high rpms going down to around 12? I thought it was suppose to go up when you get on it? When I was checking my AFR yesterday it would flucate alot but always seemed to settle around 14.xx, is this good or bad?
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The higher the number the leaner your car is running, hence less fuel and too much air. The lower the number the richer your car is running, hence more fuel.
You will not hurt these cars with a lean condition under 3500-3000 rpm's. You can destroy your engine from detonation in the higher rpm's if your A/F is too lean. This specific car needs to have the A/F between 12:6 - 13:2. In my honest opinion 13:2 can even be a little lean but it is borderline. Yes, in theory the leaner you can make the car, the more power the car should make. However I have found with this car there is a happy medium where it likes to live. That medium is those safe numbers I listed above. Obviously if the car was running PIG rich it would make lass power. For example: if your A/F was in the low 11's to high 10's you would be dumping too much fuel....
Tony
To add one more thing, optimum A/F at idol is 14:7