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Old 01-14-2006, 07:52 PM   #1
Fred
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Default Installed 2004 STi suspension on 2000 2.5RS

Don't know if anybody has already done this and posted info on it, but...

How to install a 2004 USDM STi suspension including springs and struts on a 2000 2.5RS…
(the steps that have already been covered somewhere else will not be described in detail here)

1. Obtain fully-assembled takeoff suspension from 2004 STi.

2. Remove suspension from RS.

3. Install front suspension from STi, fully assembled. Use “crash bolts” in the lower holes, and set both the factory camber bolts and the crash bolts to full negative camber (you don't really need the crash bolts, but I do rallyx/autox/track with mine & need a lot of front camber). You'll have to use zipties to hold the brake line to the strut, unless you take more time with it than I did and make or find a special fastener to bolt on there. I just put the brake line up into the semi-circle, put one ziptie around the metal part of the brake line on each side of the bracket and then slid a third ziptie through the front ziptie, the bolt hole and then the rear ziptie and tightened it all down.

4. Remove topmount from STi rear suspension and remove topmount from RS rear suspension. (you don’t need a spring compressor for this – there’s no tension on the rear spring; just hold the strut shaft and pop the nut off with an impact gun)

5. Remove rubber piece from STi topmount and fit the RS topmount into it (from the top, duh). Mark the raised parts of the rubber piece where the RS topmount is touching it. Cut a notch out of each of these raised areas so that the RS topmount fits down into the rubber piece - but don't cut off so much that it's loose. A serrated steak knife works pretty well for this – just wear a thick leather glove on the hand that’s holding the rubber piece down for obvious reasons.

6. Slide the 2.5RS rear dust boot over the shaft, put the STi spring on the strut, add the rubber piece on top (the flat edges point toward each other from across the car and the rounded edges face outward), and slide the RS topmount into the rubber piece - point one of the corners of the topmount outward. Reinstall the nut.

7. Install the assembled STi/RS rear suspension onto the car, using “crash bolts” in the upper holes. Set them at full negative camber. The STi strut droops more than the stock RS suspension, so don’t expend the energy to do one at a time; remove both sides before installing the STi suspension. Use the stock RS brake line clip and add a couple of medium or one very large ziptie to assure that it doesn't slide out eventually. The ziptie should go all the way around the brake line bracket, in between the strut and the brake line.

You will end up with a very firm but good-riding suspension on the street that kicks ass on dirt and tarmac, and you’ll have a little over –2 camber up front, and a little more than –1 camber in rear. Ride height should be just a little above stock 2.5RS height, around 14.5" front & rear.
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Last edited by Fred; 12-24-2007 at 09:27 PM.
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Old 01-14-2006, 07:58 PM   #2
Fred
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Oh, yeah - last step is to adjust the toe-in to zero (or whatever you prefer; I prefer zero). But if you know what you're doing, you'll already know this.
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Old 01-14-2006, 09:46 PM   #3
THAWA
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That's an interesting way to do it. Not the way I did it but very interesting.
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Old 10-22-2006, 05:27 PM   #4
Fred
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Addition:

I've heard that 90-ish Legacy rear top mounts will eliminate the need to hack & sandwich the stock RS & STi tops, but haven't actually seen them in person.
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Old 10-22-2006, 08:01 PM   #5
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yes it is:

http://forums.nasioc.com/forums/showthread.php?t=982971

I thought about doing what you did, and didn't know that the 90 tops would work when I put in my 04 STi suspension. Filing out the holes a touch doesn't seem to have hurt anything. In the rear I have -1.5 degrees, and somewhere more than that up front after I drilled my front knuckles and slotted the struts to use 2 sets of OEM bolts.

Also, V7 springs will fit on 93-01 Impreza and 92-94 Legacy perches. I'm not sure about 2nd gen Legacies.
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Old 02-26-2007, 03:37 AM   #6
InsatiableAmos
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What if i only want the STI struts without the STI springs?

For instance, i get a set of 06 sti struts and i want to put them on my '00 2.5RS with my V6 sti springs...

Can i just swap the sti springs and tophats to the V6 stuff and be good to go? Why wouldn't that work?
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Old 02-26-2007, 09:59 AM   #7
Fred
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That would work, if you swap the whole drivetrain. Otherwise, no.
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Old 02-26-2007, 01:04 PM   #8
jamal
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you could do it with 04 struts, but you'll have the previously mentioned problem with camber.
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Old 02-26-2007, 02:02 PM   #9
InsatiableAmos
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What's different about the 05+ struts if i use GC tophats and springs?

Also what, exactly, is the problem with the camber? I see some reference to crash bolts... Can't you just work out the camber with alignment-style adjustment?
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Old 02-26-2007, 02:39 PM   #10
Fred
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Camber isn't a problem, as long as you don't want more than -4ish (with crash bolts and camber plates).

Hubs are different - do a search and you'll find lots of info. No need to go over it in detail again here.
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Old 02-26-2007, 02:42 PM   #11
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Also - you don't want to use 93-01 springs unless you want the rear to be higher than the front. And unless you want the bottom of the rear springs to not fit right on the spring perch. If you do want those things, go for it.
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Old 12-24-2007, 09:24 PM   #12
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Just wanted to add that I now have an 07 WRX sedan suspension on my 2000 RS, using the method above and substituting the struts and springs. I'm using crash bolts in the rear to get back to stock camber & crash bolts in the front for extra camber. This setup puts the ride height at 15.25" in front and 14.75" in rear, and it rides like a stock 07 WRX. Handles better, since it weighs about 500 lbs less, though. I'd previously had the same springs but with 2004 STi struts on the car, which was the best rallyx suspension I've used so far. Used that for a few events this year (including the SCCA regional championship in VA, where it took 1st overall for the second year in a row), then finally retired the 2000 RS when I got a slightly beat-up 1999 RS to use for motorsports.

I installed a set of 2004 STi struts with 2006 WRX front and 2003 WRX rear springs on my 1999 RS this past weekend. Used the RS rear top mounts, from the metal upper spring seat on up. This put the ride height at 15.25" front and 15" rear. Feels great playing around on my rallyx practice course (which includes a jump where you get about a foot of air), and isn't as bouncy on the street as it would be with the 04 STi springs. Still a little bouncy, though.

Last edited by Fred; 12-24-2007 at 09:30 PM.
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Old 06-11-2008, 03:24 AM   #13
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Anybody done this for 2004 STi into 02 WRX?
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Old 06-11-2008, 04:13 AM   #14
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Look in the Stickies/FAQ. 04 STi to WRX is a fairly straightforward swap.
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Old 06-11-2008, 06:06 AM   #15
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Thanks. I'm just paranoid that the 04 STi top-hats won't mount into my WRX and I'll be screwed with my car stuck on the lift. Now I know I can re-use the 05 STI springs to replace the crap S-techs that are on the 04's until I can afford the DF210's.....
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Old 06-11-2008, 06:27 AM   #16
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What Fred is describing here is COMPLETELY irrelevant to 04 -> 02 which are both 'new age' chassis. The only non-compatible bits are 05-07 STI front struts but I expect you know that already if you have an "05 STI swap in prog".
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Old 06-11-2008, 08:51 AM   #17
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Yup....



[/Thread hi-jack]

Last edited by STimedic; 06-11-2008 at 06:53 PM.
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Old 06-11-2008, 03:18 PM   #18
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Old 09-19-2008, 05:28 PM   #19
krzemienr
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sorry to bring this back up, but can you swap all other suspension parts from an STI? I'm thinking of 04 struts with some H&R springs, and the doing the rear swaybar w/endlinks, I'm not sure about control arms, trailing arms, etc... Thanks guys

Rafal
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Old 10-04-2009, 08:08 AM   #20
vette dude
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Quote:
Originally Posted by krzemienr View Post
sorry to bring this back up, but can you swap all other suspension parts from an STI? I'm thinking of 04 struts with some H&R springs, and the doing the rear swaybar w/endlinks, I'm not sure about control arms, trailing arms, etc... Thanks guys

Rafal
Yes the rear will work provided you swap drive shafts, the front lowers require either a new cross member or some modification to the bushings.
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Old 12-18-2009, 09:32 PM   #21
dirtypaws
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Is there a photo tutorial for this? I am a very visual person.

I have a 96 Impreza and want to put the '04 STI springs and struts on it.

What is a crash bolt?

My first post BTW. I love Subarus!
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Old 10-21-2010, 02:50 PM   #22
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Does anyone know if 05+ stock springs and struts would fit on my 1996 Brighton? I know they have 5x 114.7 bolt pattern. Wandering if this would make a difference?
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Old 12-07-2010, 02:49 PM   #23
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I'm fairly sure if its a 2.5rs you already have the usdm equivalent of the jdm wrx springs and struts of the GC bodies. I am sure however that most Wrx springs and struts wouldn't require any fabrication and would bolt in no problem, they won't be as stiff as Sti suspension but the GCs are very light compared to the predecessors so even Rex springs and struts will deff be stiffer and more responsive. If you have an impreza L though you might have to fab even with wrx stuff
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Old 12-07-2010, 06:08 PM   #24
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I did it with the 92 turbo legacy tophats... keeps the hacking to a min.
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Old 12-07-2010, 11:37 PM   #25
emsmap
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I am just looking for some 2006 WRX Tein Stecs for my 1996 brighton. I know the weight difference will effect the rid height so that is why I am going with the spring that drops the WRXs the lowest which is the Stecs. Should be a good drop for the brighton. It defiantly shouldn't sag like it does on the WRX
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