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4th gen 2.5i 6mt ECU Tuning (open source)

2.7K views 15 replies 3 participants last post by  SilverOnyx  
I also had an 05 Legacy GT Wagon 5 speed and used a tactrix cable, but unless you have the definitions from somewhere, it's useless.

 
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Good luck and let us know the outcome - you're probably not the only one looking to do this. But without a turbo, doing a self-tune is not likely to give you enough improvement.
 
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Reactions: SleeperOutback
That's fantastic news - glad your persistence paid off.

When you're satisfied with your ECU edits, can you post some of the theory and practice behind your DIY tuning and what it's accomplished for your car? Resources?
 
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Reactions: SleeperOutback
One thing that helps performance is letting peak combustion temperatures get higher, but EGR is used to lower combustion temperatures to prevent oxides of nitrogen from forming. I used to block off EGR in naturally aspirated cars before.