I've searched and searched for Y2Kev's AFC "How2" thread, and can't find it. I found a thread that refers to it, but doesn't link it.

Basically, I'm trying to figure out if a SC'ed Max with a 3.25" Pulley is rich or lean at low end, and if i should be richening up with the AFC at 1000-3000 RPM or not.

I will be Dynoing in a week or two, but I'm also trying to figure out how they measure your A/F at low RPM with an Auto - are the numbers skewed like they are with power and tq for 1st and 2nd gear, or are they accurate?

If they are, should I tune it like so, looking at what my O2 wideband said from my last Dyno?

<Numbers are from last Dyno, richen = raise airflow on AFC, lean means lean airflow (+/- xx% on AFC)>

1000 - 14.79:1 - richen +17%
2000 - 13.85:1 - richen +10%
3000 - 14.12:1 - richen +12%
4000 - 13.37:1 - richen +6%
4500 - 12.21:1 - lean -4%
5000 - 12.35:1 - lean -2%
5500 - 12.50:1 - stay
6000 - 12.72:1 - richen +1%
6500 - 13.05:1 - richen +4%

The fuel ramp was tuned previously with a Cartech Adjustable FMU, but that only works under boost (which is why after I start boosting the curve looks much better)
IanS

 

If you want to look at the A/F Map, see:

http://66.235.8.219/dyno/airfuel1.jpg

Also, you can download the original Dyno and map it to the Dynojet software.

http://66.235.8.219/dyno/DYNORUN.026

Thanks!!

IanS