I've read this somewhere. Not sure if its on here or elsewhere but does anyone remember what the ratio is for leaning out AFR? For example, how much % fuel do you decrease in order to drop 0.1% AFR? I'm running pretty relatively rich around 10.5-low 11.0's and want to lean it out a bit...

If I find the answer I'll post it up as well but just want to see if anyone knew it off the top of their head.

 

What are you using to tune/fuel management?

 

I had read once that every 10% is approx 1.0 change in A/F

 

using uberdata at the moment... anyone want to confirm a 10% change in fuel = 1.0 change in AFR? I think read the same thing but would like someone to confirm it.

 

I couldn't see how that would possibly be accurate. There are so many variables to factor in that it would never be an accurate way of changing the A/F ratio.
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i understand your point doc. but a good estimation is better than deciding to decrease it 20% without knowing some ball park figure of what is going to happen...

anyone else?

 

cmon i know someone else has a b16 and is using uberdata with a t3... just a rough estimate!

 

just a rough estimate but for my setup a 1%-2% => 0.1 change in AFR--same as 10% change in fuel = 1.0 AFR change. Just thought I'd let you fools know...

 

On your setup yeah, 10% is roughly 1 A/F point.