Thread: EJ207 Info
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Old 10-14-2012, 12:06 PM   #5
Scooby Specialist
Member#: 57156
Join Date: Mar 2004
Chapter/Region: SCIC
Location: socal
2007 V.8 207 STi
Mercedes Polar White


Originally Posted by Vlad View Post
Swapping an EJ207 in a USDM GDB body

If you have an '06-'07 WRX or '04-'07 USDM Sti

There is a fundamental gap here. The JDM never had Sti with single AVCS, drive by wire, non canbus, 32bit.
There will be a need to pass state inspection as well.
The plugs at the JDM ECU will not match the connectors in the USDM 32bit harness.
Converting the harness to make the JDM ECU fit can probably be done, but it's a one way street as far as ever plugging the USDM ECU back in.
The immobilizer of the USDM ECU feature will be lost too.

This swap has been successfully done by 4 members on the board so far, via machining and adapting the crank and cam sensors, so that the USDM ECU can control the JDM engine. Either somebody is going to make available a swap kit for this option, or you will need a machine shop assistance to get the swap to work, or you modify the harness at the ECU, and understand that state computers will never talk to it, so it's a race only vehicle.
I have tried to search for people doing this swap. I have only come across one or two. Do you recall which members have done this? I would like to follow and track their steps of getting the 207 to work.

I'm currently working on mine and have changed out the 207 cams and cam sensors which give and read a negative signal to the jdm ecu but the 07 usdm sti would be reading positive signals. I installed stock 07 usdm sti cams and cam sensors so far. I'm in the process of bolting up the last pieces to try and start it.

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