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Old 01-04-2019, 08:42 PM   #1
NicMonte
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Default 2002 wrx wagon-jdm V7 sti swap.

I am wondering what all is needed for this swap? I was considering a 2.1 Stroker block... but I think I i like the jdm style even more so. I know I would need a tune but thatís about all the information I could gather based on some threads/forums. Nothing specifically that I read stated youíd need much more than to swap the engine out and get a tune. I know in order for AVCS to work Iíd need the JDM ECU...? I think? Below are some Questions. Thank you.

-Could a Torqued Performance/ other E-tune- tune be enough to get me going?

- Would a USDM ECU be what I would use for the tune along with a Cobb AP V3

- Could I use a JDM ECU with my US Cobb AP for a tune?

-Is the V7 a direct swap? And are there parts I can order for the JDM engine, timing kit, gaskets, etc?

Please give me some superior insight on how this can be achieved! And please stick to the questions asked and how to achieve this goal!

P.S
Please, for the love of God no haters.... like, ďread this forumĒ. Or ďsounds like you shouldnít be doing this if you donít knowĒ. Or ďItís going to be expensive, whatís your budget, what is your plans for your buildĒ?

Iím learning along the way, and want to be unique, but also realistic. Yes I know itís been done. But please share how? Thank you for your time!
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Old 01-04-2019, 08:52 PM   #2
carlos.danger
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Contact iwire. They are undoubtedly the most knowledgeable group about what it takes to get a swap running properly.
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Old 01-05-2019, 10:14 AM   #3
oren
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I had a shop put a v9 into my 2003 wagon. He used the Japanese ECU and open source tuning with a dyno. That will likely be the most reliable way.

I didn't do it myself but it is pretty much a direct swap though some wires ended up needing reworking and you need to get the avcs harness.
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Old 01-05-2019, 09:25 PM   #4
NicMonte
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Please, explain your experience.
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Old 01-06-2019, 02:08 PM   #5
NicMonte
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Bump! So to my understanding it is a direct swap with the Jdm ecu and order the IA AVCS wiring for AVCS. And then plug and play? Like that easy? Obviously tune for the octane, 93 is the highest weíre im at. And thatís it? Am I missing any thing?
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Old 01-06-2019, 03:32 PM   #6
MortonCharbo
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It should be fairly direct yes. You might have to change a few small things. I put a JDM ej205 with single avcs in my 02 wagon. Essentially the same as an ej207 in terms of what you are asking.

I had to swap the coolant crossover pipe (JDM came out at an angle, USDM came straight out) and a couple lines to be able to use the oil cooler already in my car. Those are the only things I can think of that were absolutely necessary for me.

For the AVCS wiring, the ej207 engine harness will plug directly in to the car. You just need to run the wires from the car side of the plug to the ECU plug. I used the kit from iatuning but there are several options. It's an expensive option but it makes it incredibly simple.

As for the ECU, you can only use the Access Port with the USDM ECU, but then you lose AVCS. It's not possible to use avcs with the USDM ECU, but the car will run fine with the proper tune taking that in to account.

I got an etune to get up and running. Drove on that for about a month before getting a protune. I don't recommend going that long before a protune, I just didn't have much choice.

There are a lot of parts available for the ej207. Gaskets and such are fairly easy to find. Forums and Google are your friend there.

This is my personal experience from a swap I did myself with no help so I was aware of every single step. I know it's not the same exact engine, but in terms of the mechanical and electrical aspects of the swap it should be the same. If you have any more questions, feel free to ask.

Last edited by MortonCharbo; 01-06-2019 at 03:38 PM.
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Old 01-06-2019, 05:44 PM   #7
NicMonte
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Wow, thank you. Basic explanation that I was looking for.

So letís say I use the JDM ecu with AVCS wired up. Obviously I canít use the AccessPort with that setup. But would taking it to a tuner(protune) allow me to use the AccessPort once it is tuned? Or is the AP out of the equation once you decide using the JDM ecu? It would be a shame if I have to decide between the two......AVCS no AccessPort vs no AVCS and using AccessPort. Jdm vs USDM ECU.
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Old 01-06-2019, 05:57 PM   #8
MortonCharbo
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That would be correct. The Access Port won't communicate with the JDM ECU. Sadly can't have the best of both worlds in this case.

You should take pictures during the swap and make a thread on it. I really regret not doing that. :P
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Old 01-06-2019, 08:33 PM   #9
Jack
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To clarify, it's my understanding that the JDM ECU won't do OBD II. If I'm wrong, correct me. I believe there is a way to be able to switch ECUs for inspection, if your state uses the OBD port to inspect for codes and emissions.

Maybe [email protected] will see this and give you "real" info.
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Old 01-06-2019, 09:01 PM   #10
MortonCharbo
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Quote:
Originally Posted by Jack View Post
To clarify, it's my understanding that the JDM ECU won't do OBD II. If I'm wrong, correct me. I believe there is a way to be able to switch ECUs for inspection, if your state uses the OBD port to inspect for codes and emissions.

Maybe [email protected] will see this and give you "real" info.
JDM has OBDII. It's just different than USDM OBDII. There are some work arounds I've seen to allow Bluetooth OBDII adapters to read data from JDM ECUs. Not trying to correct you, just putting that out there.

The Access Port is software limited to certain ECUs. Every one of them is the same, aside from the software loaded on them. There are JDM AccessPorts out there. Just thought I'd add that.
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Old 01-07-2019, 07:47 AM   #11
NicMonte
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Thank God I donít live in a state with emissions inspections! Yea I first plan on using the USDM ecu and get a tune! I have a cobb stage 2 ebcs tune now.... And donít really want to ďditchĒ the AP for AVCS at the moment. I donít think I am around a dyno where I live, and can hold off on AVCS until the day I want to experience it! Plus Iíd like to get a vf48 or a blouch20g for a turbo up grade and make a bit more power on the stock injectors. Hopefully when the day comes to finally get a protune there might be a way to use my upgrades, AP and be able to utilize the AVCS! That would be awesome . This swap will occur in the near future, and Iíll def document the process. Thank you guys for the + feedback
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Old 03-13-2019, 06:55 PM   #12
NicMonte
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Default 2002 wrx wagon-jdm V7 sti swap.

Decided Iíd go with the jdm ej205. I decide to go with the ej205 to save 2k. The WHP #s I want, more than likely wonít require stronger pistons etc. I just ordered it from JDM racing motors. I have a set of STI pinks Iíll be installing with the current mods I do have. Found out there is a Cobb protuner in Kansas 20 minutes from my wifeís moms house! So after a E-tune Iíll drive it there to get dyno tuned. Super excited to have a motor with 55k on it! And will be doing the install myself. I opted to not get the JDM ecu.... because I like the AccessPort too much lol. Iíll be recording the process and updating as I go. Any suggestions for a turbo? With 565cc injectors, without maxing them out?
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Old 03-13-2019, 07:29 PM   #13
Blktrax
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Stock Ej205 block and heads, have dark blue 15 STi injectors, DW300 pump, with a blouch 16g-XT 7cm with 22psi peak and very little taper.

Injector duty is consistently 91-92%. Yes I need more injector to get more peak boost. But until this 230k+ mile motor goes pop, Iíll keep on truckin.
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Old 03-13-2019, 07:31 PM   #14
NicMonte
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How much WHP are you at?
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Old 03-13-2019, 10:33 PM   #15
Blktrax
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The old TD04 on the same setup was 235hp 248tq, haven't dynoed the 16g, just kept the AFR in check, and it runs well.

In tuning I briefly turned the boost up to 24 and hit 98-99% IDC and could tell the clutch was slipping. So 22 it is.
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Old 03-15-2019, 12:21 AM   #16
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Without working avcs you will be waiting till 4,000 rpm before power starts to build if you have a td04 turbo. With a bigger turbo itíll be laggier. Ditch the accessport, wire avcs and install the ECU to run it, night and day difference.
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Old 03-22-2019, 07:21 PM   #17
NicMonte
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Swap is underway! Received motor, and am in the process of getting everything ready. Timing belt, spark plugs, valve seals etc. I first though have to get it on the stand. I took off the trans bolts and will use those to mount up to the engine stand and work from there. Very excited for this swap. I talked to Eric at Torqued performance about getting me up and going with a tune as soon as everything is ready. I am being patient as I know that working quick you can mess things up lol.
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