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Discussion Starter #1
I'm about to pull the trigger on an EJ207 complete engine (includes turbo) and I was looking for some opinions.

My 2002 WRX engine is completely shot and has over 260,000 miles on it. Previous owner did not take care of the car at all. I got it for free and want to completely restore it. I do not plan on building it for massive amounts of horsepower, but will be using it as a daily driver. It's also an automatic, which is a must for me. I want to pretty much replace everything on the car either way I go.

I'm having a hard time finding a EJ205, but I did find a EJ207 for pretty cheap. It does not come with the ECU, but I found one for sale that should work (I think).

I've done a ton of research on the swap and opinions range from it's a major pain in the rear, to it's a super simple plug and play swap.

What do you think? Is it worth it for me to deal with the 207 or should I keep paying for a stupid rental car and keep looking for a 205?

If I do a 207 swap will I have issues down the line finding parts, etc?

Thanks for any input you can help me out with!
 

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The trouble with the EJ207 is not the motor itself. The trouble is the wiring. I do not think the wiring is trivial. In fact I think it's a pain.

No motor just "drops in" because even removing and replacing a motor with another identical motor involves yelling, screaming, and cursing, but the EJ motors are generally interchangeable. However, I do NOT know how to deal with the electricals. This is what you need to find out, specifically, down to the last detail. Then decide.

Another option is an EJ257 fresh long block with your existing heads, albeit refreshed if possible from a machine shop after this time. Or, with fresh heads. Again you will need an ECU to control it.
 

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Discussion Starter #6
The trouble with the EJ207 is not the motor itself. The trouble is the wiring. I do not think the wiring is trivial. In fact I think it's a pain.

No motor just "drops in" because even removing and replacing a motor with another identical motor involves yelling, screaming, and cursing, but the EJ motors are generally interchangeable. However, I do NOT know how to deal with the electricals. This is what you need to find out, specifically, down to the last detail. Then decide.

Another option is an EJ257 fresh long block with your existing heads, albeit refreshed if possible from a machine shop after this time. Or, with fresh heads. Again you will need an ECU to control it.
Thanks for your response. I've been looking into ANY engine and from what I can actually find, the ej207 is going to be about half the price as doing anything else.

I fully anticipate yelling, screaming, cursing, possibly some thrown tools, but I can handle all that. I think I have all the wiring figured out, but who knows what will happen. My concern is a year down the line when I need a part and can't find one.

I just need an engine now. I'm really leaning towards doing this and dealing with it once it's here just because this is the only thing i can find. That's kind of how I roll anyway. :screwy:

I knew this car was going to be a journey lol
 

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If you want to take full advantage of the 207 you will need the complete wiring harness for it and either the JDM ECU (which will not pass inspection in the US) or an expensive standalone engine management system. I do know a few people who run the JDM ECU most of the year, then have a modified wiring harness they can swap in with a USDM ECU to limp the car to the inspection station to get a sticker. Honestly, it sounds like a huge pain in the ass.. not to mention you're looking at paying over $1000 for the wiring alone to make it work.
 

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Discussion Starter #8
If you want to take full advantage of the 207 you will need the complete wiring harness for it and either the JDM ECU (which will not pass inspection in the US) or an expensive standalone engine management system. I do know a few people who run the JDM ECU most of the year, then have a modified wiring harness they can swap in with a USDM ECU to limp the car to the inspection station to get a sticker. Honestly, it sounds like a huge pain in the ass.. not to mention you're looking at paying over $1000 for the wiring alone to make it work.
The engine comes with the wiring harness that I'll need. I have found an ECU for $350, which the person I'm getting the engine from agreed to deduct from the price, so I'm not looking at a lot of money to make it work. I'm sure I'll need some things once I get it here, but I'll deal with that when I figure it out lol I know I may need an adapter of sorts, but I've found a lot of information on how to make the wiring harness work, so I'm not too worried about that.

I was under the impression that the only emissions test that is failed because of the JDM ECU was the OBDII test, which I am not required to pass in Colorado, or Washington, where I am moving. Do you know of any other emissions test I may fail due to the JDM ECU?

Thanks so much for your help!
 

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Discussion Starter #9
I think I've decided to just go with an EJ257 instead. It's going to actually be a little bit more money, but then I won't have to deal with any issues that may come up.

Kind of sucks that I can't find an EJ205, but I'm fine with upgrades. :D

Thanks for the help!
 

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You will need to remap the ECU for the 257 still, but things will be simpler I believe. This is likely what I'd have done to be honest. Happy wrenching.
 

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I did an EJ207 v8 twin scroll swap, in my opinion its a great option. I paid 3.5k shipped for the engine and another 350 for the swap and 150 for the ACVS wiring. The only problems I see with the swap is that some parts are hard to find (ie. camshaft P.sensor) and that if you are going to keep the 5 speed start saving up for a 6speed cause its not going to last, saying this cause i think mines just went :(. All in all, the motor is a easy drop in, the only need ACVS wiring and JDM ecu to get the benefits of ACVS.

This is just from my experience.
 
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