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Old 04-22-2004, 08:15 AM   #1
Spaceman
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Default Stock WRX turbo into 2000 2.5RS ?

Hello all !

Just bought my very first Subaru. Nice and clean but very very stock. The dealer I bought it from is a friend, and he mentionned he had a WRX turbo (and most of the engine) lying around.
We wondered how difficult it would be and what needed to be modified to fit this turbo into my 2.5RS. The only thing missing from the engine is the actual head. the block, intakes and every little strange parts are there.

he lets me have the parts needed for 1000$ (that's in canadian $)

whaddaya think? should I wait until my warranty is over?
should I leave it alone ?

Thanks for the input. (oh and I did do a search but my question depends on the parts available and cost)
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Old 04-22-2004, 09:51 AM   #2
CKxx
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If you can pick up most of the WRX motor for 1000$ i say do it. Even if you dont know how to install it yet, you cant pass that up. (assuming its not blown or anything)
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Old 04-22-2004, 11:13 AM   #3
squirrelmasta
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hell yeah! i'm going to spend more than that on WRX parts for my build so i would say yeah!
-Eli
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Old 04-22-2004, 11:24 AM   #4
Spaceman
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thanks for the replies.
any idea where I should turn to ask:

-what parts, fittings and stuff I would need from the WRX engine
-what parts, fittings and stuff I need to get elsewhere.
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Old 04-22-2004, 12:12 PM   #5
White 2.5rs
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Old 04-22-2004, 12:31 PM   #6
Spaceman
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i have searched.
the closest thing I came to an actual thread talking about the turbo install, talked about how much a legacy block would be better than a WRX or STi block, both of which I don't own.

I just thought this site was different. that people actually helped each other. pointing me to the search button does not make you look smart... just bitter about either: not caring (so don't answer) or not knowing the answer (so don't answer)
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Old 04-22-2004, 12:37 PM   #7
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MODS: please delete this thread
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Old 04-22-2004, 01:17 PM   #8
Matt Monson
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Spaceman,
Don't mind him. He's jsut bitter because he got hit with a lot of Do a Searching when he was working on his project and was too lazy to do his homework.

As for your question, what you buddy is offering you is a good start, but there is a lot missing. One big thing missing is an ECU and wiring harness. You need to figure out how you are going to make the thing run right.

Now, you could use the heads off of your 2.5RS, but the problem with that is fitment. If you are using the stock up-pipe off of the WRX, it is going to hit the SOHC heads because they stick out a bit more. The other thing is that unless you get a WRX front crossmember, you are not going to be able to use the WRX exhaust manifold either. The easiest way around this is to get a custom Up-pipe that was made to work with an RS-T and the stock manifolds.

There are not very many guys running EJ20 bottom ends with the stock heads on an RS. The EJ25' and EJ22's, as you found, are the trendy shortblocks these days. But if you get a custom up-pipe and a Link to run the thing, you can build a pretty potent RS-T for around $2000 CDN more than the cost of the parts your buddy already has available....
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Old 04-22-2004, 01:23 PM   #9
Spaceman
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wow thanks .

i guess the more stuff I take from the wrx the more i will need to get rid of my RS engine...

I may just buy the damn thing and sell it to people who need it.
or I might just sell for my friend.
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Old 04-22-2004, 03:18 PM   #10
MeshmeZ
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Quote:
Originally posted by Matt Monson


Now, you could use the heads off of your 2.5RS, but the problem with that is fitment. If you are using the stock up-pipe off of the WRX, it is going to hit the SOHC heads because they stick out a bit more.

There are not very many guys running EJ20 bottom ends with the stock heads on an RS. The EJ25' and EJ22's, as you found, are the trendy shortblocks these days. But if you get a custom up-pipe and a Link to run the thing, you can build a pretty potent RS-T for around $2000 CDN more than the cost of the parts your buddy already has available....
i thought the RS heads wouldnt even bolt up to the WRX block? (i could definately be wrong though )

when you say there arent many running the EJ20 with stock heads, do you mean with stock RS heads or with stock WRX heads?

as for your questions spaceman:

Are you asking how to add just the turbo system to your current engine? or are you asking how to swap in the wrx engine alltogether?

If you are talking about swapping just the turbo, i would probably just buy an aftermarket kit (or put one together yourself) because the only thing you are going to be able to use EASLY off the WRX engine is the turbo itself and the intercooler if he still has that. the WRX headers conflict with the stock RS block and the uppipe conflicts with the stock RS crossmember. i think even using the wrx downpipe would require changing the rest of your exhaust somewhat. Even if you were able to get all those parts to work you would still need a fuel management system or programable ECU, injectors, fuel pump, knock sensor/ timing retard....

so basically if its a turbo on your stock engine that you want, probably just get a kit and save the hassel.

another thing to conside is would it be "street legal". i dont know about canada but i know here in california the turbo kits arent smog legal, but the WRX engine swap is. also the whole swap tends to be more reliable in the long run than the RS-Turbo (though you will get mixed opinions on this one )



For the full engine swap:

http://www.i-speed.us/downloads/wrx.pdf lists pretty much what you will need to do the swap as well as some upgrades you might want to do

http://www.sportcompactcarweb.com/tech/0403scc_hybrid/
this should give you a pretty good idea of what kind of work you are going to have to do, to do the actual swap.

the "Subaru conversions" forum is the best place for this info. read the FAQ's and EJ20 installation threads which are stickied there.

hopefully that helped, and didnt just confuse the issue
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