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Old 04-11-2011, 11:13 PM   #1
Scooby Newbie
Member#: 279605
Join Date: Apr 2011
Chapter/Region: Tri-State
Location: New Jersey
04' WRX swap STi
v8 TwinScroll 6MT

Default 04 WRX to EJ207 swap

** I'm fairly new to Subaru cars just like everyone was at some point. **

My engine is shot. With all the issues in the engine my best option is to get another engine. FYI, here is the list of the issues, my current engine has a blown head gasket (we put Blue devil, from what I heard it wont last long), has a knock noise (good chance spun bearing) and lastly and most recently timing belt broke while driving (valves bended). - The engine came with these problems, the only problem I cause was the broken timing belt (being new to Subarus I did not know they were interference engines)

I've thought of some options but in the long run I believe it will cost more and take more time, please tell me if you agree.

- STi long block and use my current heads; my heads are damaged. (most money and takes longer)

- JDM STi ver 7/8 EJ207 engine swap. (probably cheaper and less work)

Thanks in advance guys.
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Old 04-29-2011, 05:38 PM   #2
Scooby Newbie
Member#: 279414
Join Date: Apr 2011
Default version 5 sti into a 2004 wrx

I am doing a conversion right now... Im putting a v5 sti with dccd into my usdm 2004 wrx. I cant find any pinouts or wiring diagrams for the version 5. Can someone be so kind to help me?
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Old 04-29-2011, 05:45 PM   #3
Scooby Newbie
Member#: 279414
Join Date: Apr 2011

dolosolo a version 7 or 8 is gonna cost about $8000, because if you swap the engine you will need to swap the transmission too...
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Old 04-29-2011, 05:50 PM   #4
Scooby Newbie
Member#: 279414
Join Date: Apr 2011
Default jdm swap

a jdm swap may be cheaper but not less work... lol
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Old 05-01-2011, 12:33 AM   #5
Scooby Newbie
Member#: 209630
Join Date: Apr 2009
Location: Lexington, SC
2002 WRX / V7 STI
3.9USM6 / PSM


KuReg - no need to swap the trans too - the stock 5MT will bolt right up to the 207 - you can even use the WRX clutch, flywheel, and pressure plate.

It sure as heck seems like less work to me, but I guess it's relative. We did my swap in about 6 hours.

Drove car into shop, removed motor, dropped in 207. drove out. It's the easiest swap to do - only 5 wires need to be hooked up (and they don't NEED to be, its just AVCS). Car ran like a top.

STI hybrid is more work and definitely costs more, plus you take the risk of something being wrong if you assemble it yourself.

If you do the hybrid - spend the extra cash to have EQ cut the heads to match the bore. or it wont be tuneable worth a crap.
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