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Old 03-24-2004, 03:33 PM   #1
Soon2BturbodRS
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Default JDM vs USDM swap - Emissions Issues

Hey everyone. Like most, I've gotten bitten by the EJ20 bug. I've been sick with it for quite awhile, and am just about to come into some money (finally).

I want to get a front clip, but USDM ones seem much more expensive than JDM ones. If I were to do a JDM swap (with help of several Subie guys from here who have done EJ207 swaps), what would happen when I take it to get emissions tested? What can I do to pass emissions? I don't want to do the swap, and then not pass DEQ, etc, etc.

Does it make more sense to just do a USDM swap??


Thanks
-Ben
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Old 03-25-2004, 03:59 AM   #2
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Old 03-25-2004, 04:38 AM   #3
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I wish I could help, but I would venture a guess that It isnt legal because its JDM and never produced here in that form. But I am sure you can get away with it on the sniffer if you hook up the standard smog equipment.

-and no disrespect to this board, but is there a more active subaru conversion forum.
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Old 03-25-2004, 05:06 AM   #4
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This board is pretty active... must be because many of us are on spring break and have better things to do than Subarus

-Ben
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Old 03-25-2004, 12:28 PM   #5
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um...
how is $2-3000 more than ~$5-7000? for a 207

emmissions: depends on the state.. and year of car .. with a 99 .. get the usdm
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Old 03-25-2004, 04:07 PM   #6
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Quote:
Originally posted by Jaxx
um...
how is $2-3000 more than ~$5-7000? for a 207

emmissions: depends on the state.. and year of car .. with a 99 .. get the usdm
I'm not sure where you got the first statement but...

I'm just wondering if I can get away with a V4/V5 swap in my '99... Are there any loopholes?

-Ben
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Old 03-25-2004, 06:20 PM   #7
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You just need to Register in Yamhill County... This is where I'm from and there's no Emmisions...I did have Specialty Subaru do a Sniff check on mine when they fininshed the install and it was passing fine....I'm not sure if Portland does OBD checks or not but what I found is that if a Generic OBD Scanner is used on a JDM Engine it won't register the Computer...My Situation " I was trying to use a Snap On OBD Scanner and it wanted certain digits from my Viin Code and when I entered them the Scanner said it could not detect CPU" But when I had the Subaru dealer use there OBD Scanner it registered as a 2.0 Turboo and all functions work 4.0....So it's this is my situation so hope this helps you out a little to make your descision...I'm not sure if the USDM Engines work that way or not fo the OBD system....

Ron
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Old 03-26-2004, 12:24 AM   #8
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Quote:
Originally posted by Jaxx
um...
how is $2-3000 more than ~$5-7000? for a 207
Jaxx, my motor was had for $4000 shipped... I have seen USDM STi motors go for as high as $6000 and none as low as your $2000-3000 figure. Maybe a USDM WRX motor...

Soon2B... if you can get a JDM setup, do it. You won't be disappointed. And, NO, they are not harder to get parts for... the internals are totally compatible with high-end aftermarket WRX parts and there are options for the engine management available. If you go later than a version 6, be prepared for some excessive wiring issues.
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Old 03-26-2004, 05:26 AM   #9
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I'm thinking Version IV or Version V... I can get ahold of full front clips for $2300 shipped (V4) or $2800 shipped (V5) ... These are the same guys Sport Compact Car mag buys a lot of their motors from. Pretty reputable.

-Ben
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Old 03-26-2004, 11:27 AM   #10
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It's easier to do if you try to get an Engine that works with your Year vehicle...You still have to re wire stuff but it makes it simplier..That's why I got the Version IV...I had about 30 Wires that had to be rewired but everything works good....


Ron
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Old 03-26-2004, 11:45 AM   #11
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Soon2B.. good choice in a conversion. Should be a somewhat easy swap as greenlantern has stated. Your car is screaming for it and you will be surprised how many people are shocked when they find out your car is actually a 300+hp monster in disguise

You should have Jeff Sponaugle at PDX WRX tune your car... he can eek out the hidden hp of JDM STi motors better than most. Your motor will have the potential for 350-400 Whp with upgrades only to the turbo and injectors.

Good Luck!
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Old 03-26-2004, 02:24 PM   #12
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So the summary of this convo then is... any city that uses an OBD emissions test, will not work with a JDM engine becuase it cant find the ECU?

Obvioulsy a sniffer only test would be fine.

I unfortunately live in a OBD2 emssions county and therefore cant do a JDM swap and still pass emissions. Right?

J
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Old 03-26-2004, 03:33 PM   #13
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Kreeger - Yep! That is my thought exactly. The OBS would be an amazing sleeper ... And yes, Sponaugle knows how to tune JDM ECUs like nobody's business. The wealth of information (and people with incredible knowledge) is so damn humongous here in the PacNW that help shouldn't be a problem.

I just need to make sure I can make it emissions legal...

-Ben
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Old 03-26-2004, 04:39 PM   #14
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Being relatively close to Portland, I planned on having them tune my car as well... I asked them in an email if they could make my car emissions legal for Washington and their reply was 'yes'. I am running a catless setup at this time and also, my car will not need to be actually tested until 2008, so I have plenty of time to do something about it.

Do the swap, man! Then we could form a NW sleeper wagon club!
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Old 03-26-2004, 09:11 PM   #15
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Quote:
Originally posted by Kreeger
Do the swap, man! Then we could form a NW sleeper wagon club!
i'm working on it
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Old 03-26-2004, 11:03 PM   #16
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Quote:
Originally posted by Kreeger
Jaxx, my motor was had for $4000 shipped... I have seen USDM STi motors go for as high as $6000 and none as low as your $2000-3000 figure. Maybe a USDM WRX motor...
thats what i am talking about exactly .. and it WILL pass emmisions unlike any of the others (save the usdm sti) in a state that does obd-2 diagnostics
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Old 03-26-2004, 11:32 PM   #17
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For California Emissions you need the USDM Harness as it has a lot more fuel wires for sensors and a few other things for emissions that the JDM harness does not. We all know Cali is the worse so if you go with the USDM WRX harness then you should be all set.

Cheers,
Bill
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Old 03-27-2004, 11:28 PM   #18
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Bill-

I know its somewhat pointless and will probably end up being more expensive unless you get a good deal, but can a ver 4 or 5 sti motor be run using the usdm ecu and harness.
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Old 03-28-2004, 06:04 PM   #19
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If you're getting a JDM engine and ECU and you need to pass an IM240-type emissions test on a 1996 or newer car (where they hook up a scan tool to the OBD computer), then you'll need a JDM Ver7 or later ECU. The earlier JDM ECUs (Ver4, e.g.) don't support OBD-II.

http://forums.nasioc.com/forums/show...hreadid=506043
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Old 03-30-2004, 10:05 PM   #20
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Quote:
Originally posted by Jon [in CT]


http://forums.nasioc.com/forums/show...hreadid=506043
Well thats a load of my mind possibly? I have a 2002 USDM WRX with a 2002 E207 STi JDM swap and I am in NJ the state trying to copy all of Cali's emision laws! I was worried about the OBD testing at spot inspections cause I know I will get hit sooner or later? That and I just got a APS exhaust with cat so I don't get hit with the major fine for not having one.

I had Rallispec do the swap for me as I couldn't come up with a JDM ECU. They did an incredible job on the swap and the difference in drivability between these 2 engines is incredible. May be a bit in the 6MT too that makes it more fun to drive too.

Now I have to go to my friends shop and run it on the Inspection machine to see if it comes up as a pass or not just to make sure??
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Old 03-30-2004, 10:26 PM   #21
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Quote:
Originally posted by Soon2BturbodRS
I'm thinking Version IV or Version V... I can get ahold of full front clips for $2300 shipped (V4) or $2800 shipped (V5) ... These are the same guys Sport Compact Car mag buys a lot of their motors from. Pretty reputable.

-Ben
Are you talking about Venus? I ask because some people around here have had success and others have had issues with Venus...
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Old 03-30-2004, 10:50 PM   #22
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Yep
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Old 03-30-2004, 11:21 PM   #23
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just get a ver 5 or newer engine, use the usdm ecu and harness, and make sure the emissions controls are hooked up (you MAY need a newer style intake manifold and those individual butterfly pieces to pass)
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Old 03-31-2004, 02:18 AM   #24
Soon2BturbodRS
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how will a usdm ecu work with a jdm motor? well? I don't want to disrupt the 280hp ... Would the "de-tuned" usdm ecu also be better (since it isn't tuned for 100-octane)?

-Ben
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Old 03-31-2004, 05:02 AM   #25
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Quote:
Originally posted by Soon2BturbodRS
how will a usdm ecu work with a jdm motor? well? I don't want to disrupt the 280hp ... Would the "de-tuned" usdm ecu also be better (since it isn't tuned for 100-octane)?

-Ben
well, it surely wouldnt make that 280, but once you pass the carb cert. Go get it reflashed/tuned and start making some real power
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