So my question is pretty simple. I know a healthy AFR for forced induced vehicles is about 11.5:1 to 12.3:1 (ish), however is it higher at WOT on n/a cars? I'm N/A (besides for spray) and my new wideband reads about 12.9-13.4:1 at WOT. I thought I could of sworn I've read numerous sources say that n/a AFR's are higher at WOT.


Thanks,
Brandon

 

A/F on NA cars at WOT can be higher..... I've seen some around 12.9 to 13.1 and I would think that most tuners would think that's acceptable. Again this is on a NA car assuming you're using a quality fuel.

 

Yeah, that's correct. I have a Brenspeed 93 octane tune, and ONLY use Sunoco, Mobil, and Shell 93 octane fuels.

 

Our local tuner mentioned that A/F ratios can be leaner (higher number) with an NA car. Forced induction needs to be richer. He dyno tuned mine to an average of 11.6:1 for my supercharger (WOT).