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T25 with AFC tuning

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trbotaln

15+ Year Contributor
633
9
Sep 7, 2004
hidden hills, California
I am getting my AFC soon and I am still on the T25. I have a logger already and I was wondering if when I hook up my AFC should I leave everything on 0% for the fuel trims for all of the rpm ranges. I want to do all of the support mods before I upgrade the turbo.

RRE suggests that I follow this but others have told me to leave everything on 0%
The car runs great right now without the afc, so if I intsall it and leave everything on 0% then will it drive the same?

2G Turbo Stock

T-25 turbo, RSR Cat Back, RSR DP-no cat, Filter, 14psi
Stock Injectors, Side and Lower honeycombs out, Adjusting screw backed out flush
Low Setting:
1K +50 2K +18 3K +10 4K +8 5K +6 5.5K + 6 6K +6 7K +6
High Setting:
1K +0 2K -1 3K -1 4K 0 5K 0 5.5K +3 6K +4 7K +5
TH-Point
Lo 20% Hi 60%
 
Leave everything at 0% and don't start hacking the MAS yet. As long as you have stock injectors, your car will be fine. Do all your bolt on first. See how they effect your data logs. Upgrade you turbo. Upgrade your fuel system. Then turn the boost up and adjust fuel accordingly. Once your done, everything tuned, you know what your doing, then play with the honeycombs. I tried it for a while and ended up putting them back in.
 
cool, thanx for the reply. I already have pretty much every bolt on except for the turbo but I will try leaving everything on 0%.
 
You should Leave all of your HOneycombs in unless you really go with Big injectors... 720's or higher. Taking them out will make your car run alot leaner and you dont want that with stock injectors.
 
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