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Old 02-09-2013, 01:07 PM   #11
Scooby Specialist
Member#: 268354
Join Date: Dec 2010
Chapter/Region: NESIC
Location: Massachusetts
02 WRX 05 LGT
Slow Automatics


Originally Posted by Concillian View Post
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.
50+ g/s is the normal setting for D range. I've also never seen the car run richer after a reset
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