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Old 06-05-2002, 10:32 PM   #1
seven881
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Question WRX Piping on GC8

Did a search...

I couldn't find out if the up/down pipes sold for the WRX would work for a RST project. I'm assuming they would with a little work. If there's any threads about the exhaust piping on the WRX vs. GC8 or if anyone knows the differences between the two I'd appreciate the help.

Thanks in advance,
-Rich
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Old 06-05-2002, 11:53 PM   #2
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The uppipe would not fit properly unless you changed the engine crossmember or used a stack of spacers. The downpipe back will fit with just a little bit of work (move one hanger). I'm taking the stock RS headers to custom uppipe to stock WRX everything else back from there most likely.


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Old 06-06-2002, 12:14 AM   #3
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I would question whether or not the crossmember and header would do to the trick to get the uppipe in the right place if you've got a SOHC car since all turbos (except for the old Legacy turbos) are DOHC and have slightly larger heads, I believe. I've never played with a RS DOHC head before, so not positive, but I know for a fact the intake manifolds are different heights between SOHC/DOHC.
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Old 06-06-2002, 05:34 PM   #4
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I think graham had to fab up some little spacer or something when he used the legacy setup, but thats SOHC. I thought the DOHC headers off of the WRX were a bit bigger, but you would still need the crossmember.

anyone have a part number for the WRX or legacy crossmember? and the question I have now is which crossmember would work best for our car? would the wrx one fit in there?

Brad
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Old 06-06-2002, 09:13 PM   #5
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Legacy crossmember is 200100AA120- not sure on the WRX, but I bet I can get it. Question would still remain as to which is "better." There may be no difference whatsoever in the part .


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Old 06-06-2002, 10:49 PM   #6
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noob question...

What is a crossmember?
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Old 06-07-2002, 12:51 AM   #7
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The crossmember is the large metal "brace" the engine mounts are bolted to, and it carries the weight of the engine. It is placed between the left and right aprons of your engine bay, and if you look underneath the car right between your two front wheels, you should see it (it has the power steering rack inside of it)... it's the big black metal brace running across the front of the engine bay perpendicular to the front/rear axis of the car.


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Old 06-07-2002, 12:00 PM   #8
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The Legacy turbo crossmember WILL bolt to your car, though I am not positive that the WRX piece will. Both have the same uppipe configurations, though I am not sure if the WRX crossmember is wider or not, it could very well be.

If you have a MY99-01 Subaru, your heads are SOHC, in which you will have to fabricate a 20mm "spacer between the exhaust manifold and the uppipe. Otherwise, the uppipe will not fit properly and hit the passenger side heads.

North Ursalia, if you are having a custom uppipe fabricated, make SURE that it is at least as tall as the WRX uppipe. If not, it may slighty sag where it connects to the midpipe. Mine sags close to an inch lower than stock, and that is with a Legacy uppipe and WRX turbo-back exhaust.

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Old 06-07-2002, 03:35 PM   #9
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So,
Basically the downpipe will work The uppipe needs to be custom fabricated or spacers needed to be added. Unless you want to change the crossmemeber to a Legacy one.

Will I need a aftermarket downpipe with or without a CAT or could I actually use the stock one from a WRX?

How about the ballpark cost for a custom uppipe, doesn't look to difficult?




Also, for the moderators-> Could we add a breakdown for RST project like this in the sticky part:

RS Turbo Project Threads[list=1][*]Uppipe/Downpipe...[*]Turbo...[*]Plumbing...[*]Engine Management...[*]Etc...[/list=1]

There maybe some overlap with other items, but an organized list of sections for a RST projects would help. If this already exists please disregard this request and spank me.


Thanks for the help,
Rich
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Old 06-07-2002, 03:49 PM   #10
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The downpipe will work, though I have only seen it done on applications that utilize Legacy uppipes, which places the turbo high in the engine bay as compared to a Ludespeed or Minnam kit which has a very low position.

The uppipe, could be custom fabricated if you wanted. My guesstimate would be anywhere from $250-$400, just depends if you want stainless steel or not.

The stock WRX downpipe DOES have ONE cat in it. I am using the WRX downpipe, with the cat in it, and everything works fine. I did, although, have my front O2 sensor relocated. It was placed just before the catalytic converter in the downpipe. The rear O2 was placed in the stock WRX location (I'm using a WRX full exhaust, minus the muffler). Guess what? No Check Engine Light!

The spacers are an interesting bit. If you want to learn more about using Legacy/WRX exhaust parts for a EJ25 turbo application, then go to www.nothingserious.net. This is the ultimate web site for anyone wanting to do a Legacy kit on an RS.

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Old 06-07-2002, 08:40 PM   #11
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is there anyone that can verify if I would need spacers on a WRX manifold.. has anyoe put the two next to each other to check and see fi there is a size/shape difference.

Brad
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Old 06-08-2002, 01:59 AM   #12
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The manifolds are the same. WRX exhaust manifolds = Legacy turbo exhaust manifolds.

-Jon
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Old 06-11-2002, 04:58 AM   #13
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Quote:
Originally posted by Graham
Both have the same uppipe configurations, though I am not sure if the

Graham
Ok, let me speak: LOL


Graham you are wrong about both the WRX and Legacy Uppipe being the smae CONFIGURATIONS....the WRX uppipe is SLIGHTLY shorter.... and the turbo did not fit in the riht place...I have a PDE uppipe in my car.,...i had to put MANY spacers in to make it fit...since it is made for a DOHC WRX....anyhow....if you remove the heatsheild from the Legacy uppipe it WILL fit w/o using ANY spacers between the uppipe and manifold...and I am running a PDE downpipe for a 02 WRX along with an HKS Carbon Ti. catback for an 02 WRX....both of these required MINIMAL mods to make them work...the downpipe need an extra bung...and the catback needed a relocated hanger......but besides that it works great!
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Old 06-11-2002, 04:59 AM   #14
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PS, PDE makes BEAUTIFUL STUFF! The best sponsors in the world!
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Old 06-12-2002, 12:10 PM   #15
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Adam, I'll bet you money the Legacy up-pipe DOESN'T fit without a spacer

http://www.nothingserious.net/images...conflict_1.jpg
http://www.nothingserious.net/images...conflict_2.jpg

I hadn't though of the up-pipes being of different lengths. When you had to add spacers, did you need anything more than 20mm? That should be the size of the spacer Graham is using.

I even have some pics of the spacer now too...

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Old 06-13-2002, 01:29 AM   #16
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Um stimpy! I followed YOUR page when i installed my legacy turbo setup! After i took of my heatsheild i installed the uppipe WITHOUT any spacers! NO JOKE! I WILL bet you money! I just recently DID put in a spacer because i wanted a LITTLE bit more clearance, but it was not really neccessary!
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Old 06-13-2002, 08:47 AM   #17
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Adam, you didn't use a WRX uppipe, you used a PDE uppipe, so how would you know? Maybe the PDE is 'SLIGHTLY' shorter than the stock WRX uppipe?

Remember Adam, the EJ20's intake manifold sits further forward than does the EJ25, so that extra room is available. On the EJ25, that extra room in front of the turbo is NOT available, as the intake manifold is right next to the turbo, with NO room to move it closer.

Unless you held the two uppipes (Legacy and WRX) right next to eachother, I don't think we would know. Maybe PDE intentionally makes them 'SLIGHTLY' shorter, even though it says on their sight 'OEM Fitment'.

Sorry if I was off by a centimeter or two, though.......

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Old 06-13-2002, 10:48 AM   #18
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IIRC Adam is using the Legacy turbo up-pipe... the PDE aftermarket one wouldn't clear his 2.5 heads.

Jon
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Old 06-13-2002, 02:08 PM   #19
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Quite right! I started off running a Legacy turbo uppipe with the spacer because i hadc all the stock heatsheilding on there! THEN i got sponsored by PDE....the gave me an uppipe, but it was too short...it DID clear the head VERY WELL but it was too short, placing my turbo too low and causing the turbo to hit the manifold....THEN i stripped the Legacy turbo uppipe of the heatsheild and put it in the car WITH OUT ANY SPACERS.....It fit fine, but i slipped ONE spacer in there when i had finished just because it added a LITTLE extra clearance! So there we have it.
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Old 06-14-2002, 11:17 AM   #20
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Thats interesting because those pics I took were me trying to fit the up-pipe on there without a spacer. It was a no-go.

Adam, did your up-pipe have the expansion joint on it like what shows in my pics? I believe that's what hit when I tried installing it.

-Jon
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Old 06-14-2002, 05:02 PM   #21
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Yes it is EXACTLY like on your page. The flex joint was pretty close to the camseal, but not touching. I put a spacer in JUST IN CASE. TRUST ME dude! It fit! Im not going to lie about this! What is to gain by lieing?
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Old 06-17-2002, 11:08 AM   #22
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Very interesting. Maybe I just didn't look hard enough at it.

-Jon
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Old 10-16-2003, 05:26 PM   #23
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Question wondering

Okay I've searched and have not found a single person that has used this list of components. At least from what I've read.
1.wrx crossmember
2.wrx headers
3.wrx up/down pipes
4.wrx turbo
5.wrx intercooler
on a 2.5 RS or a Forester which is what I'm planning on doing this on. I have an automatic also and wonder if the stock wrx piping and all will fit in a Forester.
I plan on using a wrx fuel pump, split second voltage clamp, j&s safeguard as well. what do you think?
~ferretboy
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Old 10-16-2003, 05:38 PM   #24
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What strange luck. This is almost the exact combination of parts I'm planning to install on my forester in the next year, as soon as the motor project for my WRX is complete.

oh, and bump

-Duncan
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Old 10-16-2003, 05:58 PM   #25
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Default Re: wondering

Hmmm... I have 1,2,3,4 and 5 on my car right now which is a 2001 RS. I'm not sure about an auto, but 3 and 5 only take minor modification to fit. Changing the cross member is tricky, but I had my enigne out while I did it. The forester should be the same, but I can;t say for sure.

Quote:
Originally posted by ferretboy
Okay I've searched and have not found a single person that has used this list of components. At least from what I've read.
1.wrx crossmember
2.wrx headers
3.wrx up/down pipes
4.wrx turbo
5.wrx intercooler
on a 2.5 RS or a Forester which is what I'm planning on doing this on. I have an automatic also and wonder if the stock wrx piping and all will fit in a Forester.
I plan on using a wrx fuel pump, split second voltage clamp, j&s safeguard as well. what do you think?
~ferretboy
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