MX-3.com

People. I sold/scrapped all my MX-3's, but you are by far the best online car community I know.

I need a soundboard of technical people.

I got myself into a nightmare swap with Subarus.

I am putting an EJ20K from a GC8 JDM STI (2.0 turbo, 280hp) into a USDM SG Forester X (2.5L NA, 160hp).

Mechancially, the swap is a breeze. Plug and play - yay!

The wiring harnesses are completely different. Different bulkhead plugs, different ECU plugs, one is RHD one is LHD.

In order to avoid literally building a new harness.... I had this crazy idea.

What is stopping me from stripping down the STI harness to the bare bones engine control, and running it in parallel with the stock Forester ECU? The Forester will never know the engine is running, and the STI will never know it's in a whole entire car.

Do you see any problems with this idea? All I can think of so far is that the Forester can't know the engine is turning (thinks key ON, engine OFF all the time) and the STI ECU has to know everything about the motor, and likely control the fuel pump as well. Have to port signals to the gauge cluster, only letting the appropriate ECU know whats going on.

Thoughts? Opinions? Game changing ideas? Deal breakers?

Thanks in advance,

Ryan

Have you joined this site yet? http://www.toronto-subaru-club.com/ or this site http://forums.nasioc.com/ Finally a guy on the TSC site who loves frankensteining things handle is itsamysteray { http://www.toronto-subaru-club.com/forums/forum348/} subject his name and he will answer you pretty quick. He lives about 20mins from me. Cheers you young punk

The solution is to buy an MX3?

See if you can get ahold of Ganue on here. If I recall, him and his son would do Subi swaps often....along with buying every SE mx-3 they saw, lol. They're on NASIOC, too. They might be able to help.

Finally, answer us back. Reply damn you reply!

Sorry!

I got it sorted. It all worked out in the end! I spliced the harnesses, but maintained the old one, so this silly swap is reversible!

http://www.subaruforester.org/vbulletin ... mb-601986/