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Old 10-31-2007, 01:30 AM   #1
Scooby Newbie
Member#: 79402
Join Date: Jan 2005
Chapter/Region: NWIC
'05 STi

Default maf scaling and ecu definitions

I need to rescale my maf.
Using a lm-1 wbo2 and and will be using enginunity for the changes.
USDM 2005 sti

Im running rich right now.
Idle 13.9-14.2
Redline in 4th 10.1

Im looking to lean out

So when rescaling will i need to change anything else (any other tables) other than my maf sensor scaling table?

Also there is a new ecu definition on scoobypedia for my year and model.
Should i use that for my adjustments and then flash that to my ecu?
Or use the copy taken from my ecu?
What is the difference?

This is what i pulled off my ecu---A2BJB10J,AJ930

This is (?new?) one from scoobypedia--- A2BJB11J.AJ931
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Old 10-31-2007, 03:50 AM   #2
Scooby Guru
Member#: 98961
Join Date: Oct 2005
Chapter/Region: MAIC
Location: NOVA
2003 WRX


13.9-14.2 at idle suggests you're not in closed loop. I'm curious why you're messing with the MAF and not a fueling table. How do you decide to do one or the other? I was under the impression you only had to jerk with the MAF when something changed with the MAF like a different intake.

With my WRX, I installed the newest stock subaru rom and I'm been modding with it as a baseline. I didn't see any difference in the tables though I didn't check them all.
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Old 10-31-2007, 04:31 AM   #3
Scooby Specialist
Member#: 158006
Join Date: Aug 2007
Chapter/Region: TXIC
Location: San Antonio
2003 WRX IdleWagon
1992 GVR4 379/1000


Might want to look at the Open loop fueling delay tables as well. I know for 02-03 you can zero the one table we have which can make OL/CL switching alot faster, but for the 05 I'm not sure.

I know there are long posts about all these topics on the Enginuity forums. Might want to do a few searches over there. I'll give it a look myself.

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