sawedoff

iTrader: (3)

What does the A/F ratio change to on WOT? I know it's 14.7:1 (lambda)on part throttle, but I haven't been able to find any info. I know it goes to open loop at WOT. So I'm stumped. Surely the stock programming would not run an engine lean like it would on part throttle.

JoeDirt

I beleive you want to target around 12.7 - 12.9 WOT for an na car and 11.7 - 12.0 for forced induction ??

sawedoff

iTrader: (3)

I am interested in what the stock ECM would set the A/F ratio at, on WOT. I have heard that quote of getting the A/F ratio in the 12.7:1-12.9:1, but I believe that was the rule of thumb for carbureted setups. I'm not looking to adjust the A/F ratio, and I'm not doing any tuning. It's just for informational purposes. I just wanted info on what the ECM sets it at, and maybe if any tuner hacks or gurus on the board would know this. I figure it's just another one of my questions that I won't get an answer to, but who knows.

JNorris

iTrader: (4)

My 98 stock WOT A/F was 11.7.

longdaddy

2001 z28 A4 stock tune, at WOT A/F is 12.6 - 12.7

sawedoff

iTrader: (3)

Hmmm, I'm wondering if the WOT A/F ratio on the 99' model years with the smaller injectors would be different, since the 98' models had bigger injectors and the 2000-2002' years went back to the same size injectors as the 98's for the remaining production?