[Tor]

Originally Posted by Kodename47

I tried to do the rescale from memory, just put an OEM scale into it and:
MaxV is the maximum voltage
Max Unchanged should be left as 2.5v
MinV is the lowest reading you see when running, or just below.

Thanks, from playing around with it, exactly like that seemed to give the most even spacing.

Is the AFR swinging even an issue? Could it be the result of something else? If it bothers you that much and you are always keeping an eye on it, you could just disable the LTFT..... If it's just LTFT is open loop then maybe adjust the fuel trim boundaries. I never found the reason why the split injectors caused odd LTFT at higher RPM

The only issue is that it's running richer than I intended (down to 11 when the LTFT are at their highest). Maybe it's not even a problem, I can't really feel a difference when the AFR is 11 or 11.5 and subjectively this feels like the best and most powerful I've had flashed so far. So to be honest I am starting to wonder if the performance difference is even measurable if making it leaner. Still for the learning experience and to satisfy my OCD tendencies I would like to continue and see if I can get it in control.

What would happen if I reduced "AF Learning #1 limits" from +/-40% to e.g. +/-2%? Would that mean I would never see LTFT beyond those limits? And would it pose a problem for CL operation or would it just apply more STFT as needed beyond the limits set, as required?

I assume "AF correction #3 limits" are the STFT? They are +/-50% so I assume this should be plenty to control AFR in all situations anyway?

I like the idea of the ECU still having some control of OL AFR, in case I am forced to use some other brand/quality of fuel than I usually do. If setting the limits as low as +/-2%, does it even still have a reasonable effect, or could I just as well disable LTFT all together?

That is correct about the ELC, you could adjust that and see what happens. I use the same log to rescale the MAF and then adjust the ELC after.

This would probably be what I'll try next then. I like the idea of having that table based on my actual mods and not a generic stock table anyway.

Tactrix logs MAP as XX.XX to XXX.XX. Eg. low 22.68 or high 100.29 (tuning engine off). I can't figure the unit out. But it looks like I should just divide them with 100 to get bar (0.2268 and 1.0029 in the examples) to make it compatible with the ELC table?

Flat AFR targets, yes just for scaling. The leaner the better as the O2 sensor will be slightly more accurate.

Ok, then flash a tune with zeroed out ELC and IAT Comp and 12.3 OL in all rpm above load 0.9 to collect data to do it all in one go. I suppose it would be a good idea to reduce the timing a bit to avoid it knocking when doing pulls?

Thanks again!