I've made some research and it appears no one knows what the units are. I guess I'll have to figure it out by doing datalog comparing maf voltage and a/f ratio against air flow numbers.
What I'm trying to do is to relate load with air flow, that way it should be easier to find pulsewidth for a target a/f based on air and fuel flow numbers.
Regarding Load on the pfc this is what I found:
Air Flow Correction (AFC)
Defines eight MAF sensor voltages and associated Air Flow percentage corrections.
Air Flow Curve (AF)
Defines 32 MAF sensor voltages and the associated volume of air that enters the engine. This curve models the engines volumetric efficiency (VE) with the throttle wide open (WOT).
LOAD = min (2^15, (AFC * AF) / RPM) * (2^14))
Notice that the maximum LOAD is 32768 (= 2^15) and that this is also the maximum practical LOAD MAP Reference.
Nevermind, I just realized there is a target a/f ratio function integrated in the datalogit software. I think I'll just need to calibrate the air mass flow numbers to match actual a/f ratio to the target a/f.
PowerFC seems like a long time ago, I had Boosted 2.0 tune mine.
I actually have a Datalogit in trunk of my car...
I think I still have the disc for it also.
Who wants it? I'll let it go cheap since i do not have car or PowerFC any more.
Jesse IL, I'm new here and I've been reading and following along. I find this very useful for me as I'm learning to use Power FC with FC-Datalogit. My ultimate goal is to be able to tune my car. Thank you. By the way I can't access the posted links below. I'm follow along and I want to be able to use what you have sample. Help..
I am tuning my 1zz with the PFC. i have some lean rich issues at waming up with low load between 800 and 2400 rpm.
it looks like every time i shut down the engine, and later on i start the engine is react different. Or its more rich than the last session or more lean.
SO i want to use the O2 feedback (i had it off all the time) for more safety, but when i switch is on, first its ok, but when i start to drive the engine is shaking. If i stop it keeps shaking at idle. If i switch the O2 feedback of the shaking is gone.
Is there an explonation for this behavior?
You'll need to adjust the correction factors in the top left corner of settings tab 2 - when the coolant level is cold, the correction factor will amend the fuelling until the next temperature breakpoint.
I'm not familiar with O2 feedback - I don't use it.