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Old 02-23-2012, 12:29 PM   #1
Scooby Newbie
Member#: 188216
Join Date: Aug 2008
Chapter/Region: MAIC
Location: Balitmore,MD
2006 STI

Default 05 RS to 08 2.5I ECU

I found this from another forum and it is the exact swap i am currently doing and i just need a little help with some wiring. I have a 05 RS with a bad motor and I got a motor out of a 08 Impreza 2.5I that i want to swap into my 05 RS. Need help thanks you. Below was taken from other forum but explains exactly what i need help with. Thanks.

About 3 Months ago my 05 RS developed an odd little rattle. Then...the gold flecks in the oil. And for those who remember my Yellow WRX...yes, the car had oil, and yes, it was changed regularly. Anyway, After verification that it was the rod bearing I changed the engine out for an 08 2.5i engine. In most ways they are identical, however the 08's had Variable Valve Lift. The engine runs fine, however it's slightly underpowered due to the fact that the system isn't being used, and it was set up to have it. As the 05's were a change over year (had the Direct throttle body, but did not have the VVL), the question is how different is the information inlet into the 08 ECU from the 05 ECU? I'm curious as to wether all of the dash information (side plug in to the ecu)plug ins are identical, hence, if the ECU's could be swapped out with no cutting of wires. Any info would be most appreciated. Thank
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Old 02-23-2012, 09:35 PM   #2
Scooby Specialist
Member#: 85932
Join Date: Apr 2005
Chapter/Region: MWSOC
Location: Cincinnati's West Side
2005 STi / 2013 STi
2005 Forester XTi


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