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Old 02-08-2013, 06:12 PM   #9
Concillian
Scooby Guru
 
Member#: 4414
Join Date: Feb 2001
Location: Dublin, CA
Vehicle:
2002 WRX Sedan
Midnight Black

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That's richer than my stock version 8 table, which is very rich. I suspect it was tuned by adjusting the OL table only and not touching the MAF calibration. This would mean it would need to be set rich to compensate for the MAf miscalibration, which is clearly leaner than the stock MAF cal.

If so, and the car was tuned right after flashing (as is typical,) then you end up going even richer after the car learns a positive offset. However, looking at your learning view again, it looks like the tuner raised the D range g/sec so the ECU learning won't affect open loop. This has it's own potential pitfalls, but if you're going to tune by adjusting the OL fueling only, then it's probably best to do it this way.

It could also be this way to compensate for the 300 g/s limit in the 16-bit ECUs and eek out a few extra %. There are better ways to do that, but this way certainly works.
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Last edited by Concillian; 02-08-2013 at 06:20 PM.
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