wrx turbo for ej25?

1563 Views 10 Replies 5 Participants Last post by cRayZee, Jan 28, 2002

cRayZee

Discussion Starter · Jan 24, 2002

This might've been asked before, but here we go...

Just curious, would the wrx turbo td04..blah blah whatever be able provide enough airflow @ 5psi of boost for the ej25?

-vic

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cRayZee

Discussion Starter · #2 · Jan 24, 2002

ok, so I was told that this turbo is a bit bigger than the legacy turbo, correct? So if people are using the legacy turbos on their RS's, the wrx turbos should do fine, right?

-vic

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The WRX should work fine if you can get the WRX OEM Up/Down Pipes to fit into your RS (or have custom one's made). I think that there are several people undertaking this type of project. As far as 5 psi, you would need to get some type of new wastegate, since the spring in the TD04 is set for something around 14 psi. The WRX turbo is probably a little bigger than the Legacy RHB5, but like the Legacy turbo, you will probably run out of steam in the upper RPM range.

Graham

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KillerTHC

· #4 · Jan 25, 2002

get a manual boost controller and set it low and you can keep it around 5 psi. as for when you hit the upper range, the turbo will run out of steem so you won't have the top end like with a garrett t3/t4 or vf23.

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Graham

· #5 · Jan 25, 2002

I heard that the VF2 lost some of its power up top as well. I don't know, I could be wrong, just something I read somewhere.

Graham

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subachad

· #6 · Jan 25, 2002

The way I see it. If a TD04 from a WRX can flow enough air for 217hp on a WRX, it can flow enough air for 200+ hp on a 2.5. It is a little bigger than the RHB5, I've actually had both installed on my car, but have not run the TD04 since it's not mine.

If you go that route, I have some of the parts you will need on my site. You might also check my turbo parts list for recommended parts for the swap you are considering. A basic setup with this turbo will run around $1500.

I have one up pipe in stock for $200 if you are interested and can have a downpipe in about a week. I'd suggest Jet-Hot coating though.

Chad
93 1.8T
www.uniquemotorsports.com

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cRayZee

Discussion Starter · #7 · Jan 26, 2002

chad, i'll get in touch with you once i've got the money to start collecting the parts i'd need for turbo.

I'm probably gonna get started with gauges and engine/fuel management first, any recommendations?

-vic

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Graham

· #8 · Jan 26, 2002

For my pre-turbo setup I did an ACT clutch (six months ago), suspension (ver. 6 STi), lots of brake work, GReddy 52mm Fuel Pressure, EGT, and BOOST!

Graham

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AaronB

· #9 · Jan 27, 2002

KillerTHC said:
get a manual boost controller and set it low and you can keep it around 5 psi.

I would have to vote against that idea. I know of several people who fragged their motors trying to use a MBC at low boost levels, myself included.

Just let the wastegate regulate boost if you are only running 5psi. No need for anything fancy.

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subachad

· #10 · Jan 27, 2002

Here is a link to a VERY basic turbo setup I made using the WRX turbo.

http://www.uniquemotorsports.com/subachad/mods/turbo_parts.htm

Oh, and AZ Scooby is right, you can raise boost with a boost controller, but you can't lower it any less than the spring setting. I explain that on my site under the FAQ.

Chad
93 1.8T

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cRayZee

Discussion Starter · #11 · Jan 28, 2002

Thanks for that link, I'll probably be using that for reference shortly

-vic

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