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Old 07-09-2015, 07:27 AM   #1
Deewayne757
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Default Jdm ej205 into 02 wrx

What all needs to be done to complete this swap the right way ? I have a 02 wrx and my timing belt came off while on my lunch break . Long story short I need a new engine and from what I've see. The jdm ej205 is the cheapest route to go . Any input would be appreciated
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Old 07-09-2015, 07:30 AM   #2
livid_wrx
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Need to wire up for AVCS, I don't think there's a port for the front 02 sensor so you'll need headers. So, new headers and wiring and tune for the tgv deletes if you're running it with usdm ecu.
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Old 07-09-2015, 09:45 PM   #3
Myis300
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Just finished this swap you need to swap over your USDM intake manifold with harness also the exhaust manifold and the driver side cam gear and the crankshaft gear that's it. Get the motor without the avcs
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Old 07-09-2015, 09:57 PM   #4
Deewayne757
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Thank you guys for the quick response ! So is it best to stick with the usdm ecu ?
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Old 07-10-2015, 08:08 AM   #5
livid_wrx
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For emissions, yes.
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Old 07-10-2015, 07:17 PM   #6
Deewayne757
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I live in virgina beach and we don't have emissions here . Not worried about that !
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Old 07-10-2015, 10:30 PM   #7
jackassofalltrades
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02 WRX w/AVCS EJ205 wagon

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I'm in Ohio, No emissions. Swapped JDM AVCS ej205 with the tranny and JDM matching ECU, repinned the IAperformance wiring kit - took 30 mins. (http://www.iaperformance.com/product...oducts_id=2580)

Started right up, no check engine light. The JDM engine does not have TGV's or a EGT sensor for the uppipe. Leave it unplugged, I have been running this setup for the last few months and couldn't be happier with the results.

Using the USDM ECU is a chore, just swap out the entire engine with the JDM engine harness included(not the body harness) and JDM ecu and repin the ecu and original wrx body harness with the IAperformance kit and you're good to go.

When it comes to tuning; you will need an opensource tune (tactrix cable) from a reputable company since the Cobb AP is not functional with the JDM ecu.

I got an 04 engine and tranny for 2k out the door with the ecu. Everything matted up with no trouble.

If you have any questions, let me know.

Last edited by jackassofalltrades; 07-10-2015 at 10:32 PM. Reason: Tuning edit.
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Old 07-11-2015, 07:23 AM   #8
Deewayne757
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@jackassofalltrades thank you so much for the help !! I really appreciate it . So did you have to change your intake manifold , crank sprocket and top right cam sprocket ?
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Old 07-11-2015, 08:34 AM   #9
livid_wrx
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You don't need to do that if you run the jdm ecu.
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Old 07-11-2015, 08:46 AM   #10
ToneWrx02
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The swap is straight swap. Dont need to swap any inyake manifold. You dont need to change any cam gears or sprockets. You dont need to seal the avcs cams. You dont need to wire anything or remove any wiring.

If you get the right jdm ej205 you just throw it in. Tune on your ecu and get going.
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Old 07-11-2015, 11:38 AM   #11
Deewayne757
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I hear the non avcs is best jdm engine to swap in 02 wrx . Is that true ? Thanks @tonewrx02 !!
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Old 07-11-2015, 01:32 PM   #12
livid_wrx
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Quote:
Originally Posted by Deewayne757 View Post
I hear the non avcs is best jdm engine to swap in 02 wrx . Is that true ? Thanks @tonewrx02 !!
There's too many variables to really answer that. The jdm AVCS 205 has more but requires more work. The jdm non-AVCS is a direct swap.

Up to you.
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Old 07-11-2015, 01:59 PM   #13
ToneWrx02
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Stop commenting if you havnt actually done the swap.

I have actually swapped in a jdm ej205 with avcs into my 02 wrx.

I didnt plug the cams, i didnt change wires, i didnt change sprockets. Its a direct bolt on IF you get the right one.

Will you lose power because you didnt plug the avcs cams? Almost none to nothing.

How do i know? Because ive done it.

There is some jdm ej205 that do require changing parts but thats if you get older stuff and or get ome that requires new intake manifold for throttle.

Non avcs the best? God no requires more work tbh, amd the best part is you can wire up avcs super easy for 200$ if you want and get even more low end torq.

The avcs ej205 has higher compression for more low end torq.
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Old 07-12-2015, 12:22 AM   #14
jackassofalltrades
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Like everyone else said, if you have the JDM ecu, it is a direct swap(with the iaperformance wiring) with the right AVCS engine(year/version), no headaches. Mine was a ver8.
Go with AVCS and a JDM ecu, you wont be disappointed. Yeah sure, its a bit more, but it is worth it in the long run for an additional 25 ponies at the start, plus more. No brainer. Good luck. Its a fun swap, and the results are great!
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Old 07-12-2015, 12:30 AM   #15
Deewayne757
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Thank you all for the very helpful responses ! http://pages.ebay.com/link/?nav=item...obalID=EBAY-US this is the engine I plan on putting in my 02wrx seeing how this is the only engine I can afford .
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Old 07-12-2015, 12:32 AM   #16
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Ok now I'm leaning towards the avcs engine but I don't know what version this is http://pages.ebay.com/link/?nav=item...obalID=EBAY-US
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Old 07-12-2015, 02:08 AM   #17
Deewayne757
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What about just rebuilding the engine I have now ? I haven't pulled it yet but all that's left is engine mounts and bell housing bolts . My friend told me 250$ a head 150$ head gasket kit $150 valves but I am unsure of the bottom end needing to be rebuilt . Anyone know how much a bottom end rebuild parts would cost for a usdm ej205? Just on a really tight budget /;
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Old 07-12-2015, 05:51 PM   #18
ToneWrx02
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Quote:
Originally Posted by Deewayne757 View Post
What about just rebuilding the engine I have now ? I haven't pulled it yet but all that's left is engine mounts and bell housing bolts . My friend told me 250$ a head 150$ head gasket kit $150 valves but I am unsure of the bottom end needing to be rebuilt . Anyone know how much a bottom end rebuild parts would cost for a usdm ej205? Just on a really tight budget /;
I bought my jdm ej205 with trans complete for $1400, sold the trans for $600. So i paid $800 for a avcs engine that was a direct swap.
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Old 07-29-2015, 09:32 PM   #19
projectphill
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I thought the 205 was a US engine only?
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Old 07-30-2015, 01:45 PM   #20
livid_wrx
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No. It's been used in Japan forgot a we even thought about using it here.
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Old 01-03-2016, 02:23 PM   #21
Deewayne757
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Got the swap done about 2-3 weeks ago . Fired right up . Didn't have to swap any crank or cam gears , and didn't have to plug avcs cam . Used usdm harness And intake manifold and ecu . Runs smooth and boosts fine at half throttle . I'm at 600 miles so far . Needs a tune though .
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Old 01-03-2016, 10:44 PM   #22
ToneWrx02
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You didnt even need to swap intake manifold or harness.

If you get the right year and engine its plug and play!

Only thing that wont work is AVCS but if you leave all original harness on you can easily add it later! Besides a tune this is one of the easiest swaps!
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Old 11-20-2016, 04:11 PM   #23
gc22Jake
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Quote:
Originally Posted by ToneWrx02 View Post
You didnt even need to swap intake manifold or harness.

If you get the right year and engine its plug and play!

Only thing that wont work is AVCS but if you leave all original harness on you can easily add it later! Besides a tune this is one of the easiest swaps!
what year /model engine is the correct one for direct plug and play (keeping jdm intake/wiring) into an 03 wrx?
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Old 12-13-2016, 06:37 PM   #24
Boomslang
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Just got a 98 non avcs to go into my 05. It came with the 98 ecu, if i use this ecu can i leave the gears and sensors alone? Thanks
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Old 12-13-2016, 10:03 PM   #25
DaltonSR20DET
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Default Jdm Ej205

I did the JDM EJ205 w/ AVCS (AT) mated to an 03 JDM WRX w/ AVCS (5MT) ECU and it swap straight into an 05 WRX. The intake mani and exhaust mani were identical. I did not swap any gears (crank/cams). I did also run the stock USDM (05 WRX 5MT) as a straight drop in as well... it runs (I didn't boost on it since it's not mapped for crap gas) and I had passed california smog with the USDM ecu plugged in.

I will say that the AVCS is great if you have the means to support it... meaning the use of E85 or Gasoline octane of 95 or higher. I'm stuck with California 91 and tuning the JDM ECU to be happy with 91, you really can't advance the timing like crazy as intended which makes it a bit useless. I did run the stock JDM ECU with 100 Octane and the low end felt awesome!

Anyhow... here is how my JDM EJ205 AVCS fared up:

on TD04 @16psi / 91 octane / turboback / intake / avcs

221 Peak HP / 239 TQ (Mustang Dyno)




And recent run with:

VF48 @ 20psi / 560cc Injectors / 91 octane / Grimmspeed 3port boost solenoid / walbro 255lph / STi TMIC / intake / turboback / avcs

(TD04 - dotted lines) (VF48 solid lines)




286 HP / 293 TQ
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