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Old 05-17-2018, 01:11 PM   #1
pcampbell
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Default JDM Racing Motors EJ205 into 04 WRX?

JDM Racing motors says their 205s are drop in compatible with USDM if are ok with AVCS being unused. No pulleys or sensors to change. Is there something different about theirs over the $999 eBay jobs which say you need to change a bunch of stuff? Is it literally drop and go?
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Old 05-17-2018, 03:20 PM   #2
snow_bound26
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From what I've seen the ones at $1000 or less are the non-avcs versions which are more plug and play if you aren't going to use the avcs anyway. If you actually manage to get an avcs 205 from a wrx (really rare. Most are from foresters) then it will be mostly plug and play. The one I'm working on now was advertised as from a wrx. It was from a late 02/early 03 forester. I had to use the coolant crossover pipe and ac compressor from my usdm 205. Some of the jdm engines have oil coolers as mine did. I'm using the power steering pump from the jdm engine as mine is shot. But the hose coming off the top is a little different. Pretty easy to adjust for though. The pcv system is different on the jdm stuff so I'm in the process of figuring that out. If you see the mounting bracket for throttle and cruise cables then you're mostly good to go. If there's no mounting bracket then you'll have to use your intake manifold and throttle body.

If you can find a place fairly local to go and get it in person I highly recommend it. I was able to look at a few options and find the most direct plug and play one I could. Quite often the pictures online aren't the one you get even though they claim they are. I was also able to have them hook it up to a battery and do a proper compression test. Ruled out the first engine they brought out. One cylinder was substantially lower then the others. The second one was good on all 4.
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Old 05-18-2018, 07:47 AM   #3
Titter
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drop in. leave avcs unplugged. have fun.

jdm racing motors knows their ****. listen to them.
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Old 05-18-2018, 09:33 AM   #4
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Thanks.
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Old 05-18-2018, 11:24 AM   #5
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Quote:
Originally Posted by Titter View Post
drop in. leave avcs unplugged. have fun.

jdm racing motors knows their ****. listen to them.
Absolutely!
JDM Racing Motors also supplies a video of their compression tests.
Their prices are good and their Customer Service is excellent.

What you see in their pictures is what you get
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Old 05-18-2018, 04:43 PM   #6
pcampbell
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Being that the motor has 50k miles on it and unknown age. Should I just replace the timing belt... The components (water pump, pulleys) should be fine @ 50k. At the rate that I am driving it will take a very long time to get to 100k.

So If this is truly drop in, I'm looking at:
Oil + oil filter
Coolant (maybe radiator hoses)
New clutch (old one is bad), resurface flywheel

What do I need to worry about with the tune since these are 9:1 CR. If I just run 93 on stock tune, will I be fine, or do I need to go get it tuned?

I am getting the car for free, but will be in at least 3k by the time I get the motor in.

I am not sure if I will keep or resell (Depending on how much I like the car compared to my supercharged 05 Outback.), will JDM205 negatively affect resale?


Thanks.

Last edited by pcampbell; 05-18-2018 at 04:54 PM.
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Old 05-18-2018, 06:25 PM   #7
snow_bound26
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I looked at the company you are getting it from and you can see which are from a wrx and which are from a forester. Look at the coolant crossover pipe. If it points forward it's from a wrx. If it points to the passenger side it's from a forester.

Yes you will need to get it tuned. In my research I've found most are 9.0:1. They can also be 8.2:1 or 8.4:1. Your tuner will just make it run properly. I know everyone claims that Japan uses 98oct but I've had friends who lived there and octanes can range between 94-98 which is higher then US either way.

I did my timing belt and checked the pulleys and water pump. I would also recommend doing all gaskets as well. Flatirons Tunings sells most of the gaskets you need for this. The AVCS engines do have a specific gasket. Flatirons sells it with the spark plug gaskets so it's a good deal.

Not using AVCS will make it run very similar to the USDM 205s after its tuned. With AVCS you will have better off boost throttle response closer to what the 2.5L has but it's still a 2.0 no matter how you look at it.
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Old 05-18-2018, 07:14 PM   #8
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thanks for the info on the crossover pipes. I am really trying to make this as easy as possible on myself, so would like to get the correct one especially if I am paying so much money for it heh.

So if I get this one, I have to transfer the crossover pipe ?
https://jdmracingmotors.com/en/subar...swap-for-sale/

This one would be fine?
https://jdmracingmotors.com/en/subar...c-engine-swap/

That makes sense, since the first one there says some swaps are required, the 2nd says it's a direct fit.

Which gaskets are you suggesting to change out?


Japan uses "RON" not " AKI".. their 98 would be like our 93 . So depending on the requirement of the motor in Japan, running it on stock tune and 93 octane might work fine. But I guess I will plan to get it tuned.

Last edited by pcampbell; 05-18-2018 at 07:51 PM.
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Old 05-18-2018, 09:34 PM   #9
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The difference in compression would require a tune on the USDM ecu. The higher compression will make it more det/knock prone.
The second link will be much more direct swap, though even small things like the AC and power steering pump can have slight differences. The AC lines look more accurate on the second one as does the power steering pump. I’m guessing it should be really close to our USDM accessories.
The gaskets I recommend are everything that doesn’t require taking off the heads. The head gaskets should be fine. But a basic list would be:
Valve cover gaskets and half moon plugs (they get brittle)
Spark plug seals
Rear main seals
Throttle body gasket
IACV gasket (clean the valve while you’re at it. Gets gummed up)
All intake manifold gaskets
Exhaust gaskets including manifold, cross pipe, up pipe, down pipe. (Grimmspeed sells an entire kit for this)
I’d do the turbo inlet as well. They are notorious for ripping and usually result in an intake leak. Perrin, AVO, and Tomei all make good options. Perrin ones are easy to find used as well. I’d stay away from the eBay ones as they have a tendency to be soft and have had issues collapsing.
On all JDM engines the PCV system is different so somethings will not be direct. I’m still figuring out the differences though I’ve only found a couple so far.
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Old 05-18-2018, 09:40 PM   #10
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One other thing I forgot to mention. They can with several turbo options depending on the year and model designation. They can be TF035, TD04-13T, TD04-15T, TD04-19T. TD04-13 and 15 seem to be the most common. But you could end up with any one of them potentially. The 13T is what we got here in the US. The TF is smaller. The 15 and 19 both have more power potential.
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Old 05-18-2018, 10:11 PM   #11
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Quote:
Originally Posted by Titter View Post
drop in. leave avcs unplugged. have fun.

jdm racing motors knows their ****. listen to them.
^^^^This and they are great when it comes to customer service. I broke a AVCS sensor and they sent me one no charge. I bought a JDM205 and dropped it into a Saab 92x last year.
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Old 05-20-2018, 06:38 AM   #12
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the engine in the 2nd link is super clean! look at the throttle body and bell housing area. must have been on an automatic.
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Old 05-21-2018, 09:48 AM   #13
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I've done the swap, and will toss in my two cents.
1. If you buy an AVCS motor, hook up the AVCS. It's worth it. Either buy the $200 wiring kit from IATuning, or DIY it from the resources available online.
2. Change out the timing belts components.
3. Change out the valve cover gaskets.
4. Change out the spark plugs, accessory belts, other easy/cheap wear items.
5. Valve cover gaskets are different on AVCS cars, IATuning can help you get the part number you need.
6. If you need a new clutch, do it with now with the motor out.
7. As mentioned, you may have to do something about the coolant crossover pipe if you get a Forester engine.
8. You'll need a tune for the higher compression ratio, plus you'll want to do that anyway to make the most of your fun new engine.
9. Turbos are a crapshoot, I got a tiny TF035 and swapped it for an APS SR30 anyway.
10. Replace any brittle or crappy looking hoses while you can. Some of these motors have been sitting for a while.

Overall it's a straightforward swap, but you'll thank yourself later if you take the time and diligence to take care of the simple stuff while the motor is out.
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Old 05-22-2018, 01:03 PM   #14
pcampbell
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JDM will sell me the wiring harness and ECU for $150. How much work is it to swap that out?

Clutch I was thinking about either KSB03, or the Stage 1 organic, or Stage1 organic HD.

Last edited by pcampbell; 05-22-2018 at 01:10 PM.
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Old 05-22-2018, 06:58 PM   #15
snow_bound26
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Base your clutch on how much torque you will have once tuned. If staying mostly OEM with a protune, then OEM is fine. If you’re looking at 300wtq then get a recommendation from your tuner, but a stage 1 would probably work. Clutch manufacturers list the torque rating for the clutch on their website typically.

As for the wiring, my tuner is going to pin my wiring harness. I’m laying the wires beforehand so he has less to do. You can buy the IA Performance kit. $200 but supposedly a baby chimp with one hand can figure it out. ECU is under the foot well on the passenger side front seat. Pretty easy to get to. Talk with your tune though. If you live in a state with emissions regulations where you have to link into the OBD2 port then you’ll need to get your USDM ecu done with an emissions tune. Takes 10 min to swap them out once a year.
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Old 05-23-2018, 01:14 PM   #16
pcampbell
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Doh...now they have no more of the drop in ready engines available. Will have to see how quickly they get more.

Last edited by pcampbell; 05-23-2018 at 02:24 PM.
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Old 05-24-2018, 07:13 AM   #17
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They get new stuff in all the time.

Have you also checked with J-Spec Auto in Virginia?
J-Spec is the sister company to JDM Racing engines. You get just as good service from either place.
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