RomRaider

Currently using STi pinks.

I can't seem to find the magic number No matter what I do, it seems like, as soon as the intake temps get hotter, the AF Learning goes down to -12% to -15%

What do you have for injector scaling? The JDM ECUs scale them at 528.73 cc/min.

i have them at 552.02 at the moment...

i can never remember what's the rule of thumb, high negative AF learning, lesser injector scale?

If AF Learning is +XX% then you are LEAN and need to LOWER the Injector Scaler.

If AF Learning is -XX% then your are RICH and need to RAISE the Injector Scaler.

I just tossed my Pinks in last night and they are working great. I get about +/- 5% so far.

what number scale are you using?

The standard 528.73 scaling from the JDM cars and matches the C0BB scaling for the pinks as well.

i tried using that value and the af learning dips down to -15.63%

also, when cruising, what should be the values on AF learning? crusing around, i'm seeing constant values of 10% to 14% - makes me think the injectors are working too hard.

It should be within +/- 10%. The ECU is able to correct up to 25% but in reality you'd want it all to fall within 3-5% either direction. If it's +10% then lower your Injector Scaler by 5%.

(Injector Scaler / 1.05) = New Scaler

i'll try that as soon as I get off work. stupid sunday work.

Ahhh Glad to see this!!
I recently am trying to scale my modded stock injectors correctly.
I had them at 750cc and over a period of about 5 days the learning would be about 15% and my tune would be way lean!

I then tried 775cc...got lean right away quick...tried 725cc = a bit better...tried 680cc and now it's a LOT better, the learning is about 4%!

Imagine that, modded stockers scaled to only 680cc who would have thought...

I have my modded injectors scaled to 650. My LT fuel trims are around -2. These injectors were just returned from whitchhunter for cleaning and flow. They flowed @ 900cc! So I think the new injector calculation in the defs is a little off, but in the end it doesn't really matter. Just set it till your fuel trims are good.

i was concerned as well about the numbers - but after talking to jared about it, he said there's nothing to worry about it. scale it accordingly 'till you reach the desired curve.

Not disagreeing but I'm confused as over at NASIOC I got the opposite information see here http://forums.nasioc.com/forums/showthr ... ?t=1070281 under Jon [in CT] post. Here is a snippet...

"Log A/F Learning #1. It's value is a percentage. If it's positive, increase the injector scale by that percentage. If it's negative decrease injector scale by that percentage. Repeat."

Just want to make sure we get the right information!

Well.. Take a look at both statements, then determine if Logic A makes more sense than Logic B.

Make the injector scaler bigger and you inject less fuel.
Make the injector scaler smaller and you inject more fuel.