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Old 04-22-2003, 11:59 AM   #1
boxerT
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Default How different are the new STi struts from the STi/SPT struts available for the WRX?

I am trying to decide if I should keep the WRX sedan STi/SPT strut/spring suspension as a backup for the STi, or will they not fit? The fact that the STi is .5" lower probably means that the springs of the STi/SPT set should not be used, but how about the struts? Are the struts also different?

I would hate to get rid of a suspension set that I loved if it could be used on the STi as well.
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Old 04-22-2003, 04:59 PM   #2
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the 04's wont fit on the 02's or 03's.
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Old 04-22-2003, 07:30 PM   #3
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The STi setup IS the "aftermarket" offering for the WRX. Further, the '04-spec struts have a different valving, a two-stage setup which is supposed to handle little bumps better, and big bumps just as well as the current STi stuff.

Plus they won't fit, rumor has it, though nobody knows for sure yet.

Kevin
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Old 04-22-2003, 09:06 PM   #4
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I'm sure it wouldn't be an upgrade for the STI.I'd say don't mess with the suspension set up unless you really know what you are doing and can set up a full coilover system, (not install... set up damping and rebound/ride height, etc)
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Old 04-22-2003, 09:12 PM   #5
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Quote:
Originally posted by gtguy
the '04-spec struts have a different valving, a two-stage setup which is supposed to handle little bumps better, and big bumps just as well as the current STi stuff.

Plus they won't fit, rumor has it, though nobody knows for sure yet.
Well crap; how would they not fit? (I'm not challanging you, I'm just curious) I thought not much was changed on the chassis. I was waiting to upgrade my suspension because I wanted to fit the V8 setup, with its lack of understeer, I hadn't heard before now that it might not be possible

Also...
Quote:
I'm sure it wouldn't be an upgrade for the STI.I'd say don't mess with the suspension set up unless you really know what you are doing and can set up a full coilover system, (not install... set up damping and rebound/ride height, etc)
From all accounts, the V8 STi suspension is better sorted out than the understeer-happy v7 setup (which is what the SPT kit is), so the old SPT kit would most definitely not be an upgrade for the v8 STi we're getting.
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Old 04-22-2003, 09:55 PM   #6
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Quote:
Further, the '04-spec struts have a different valving, a two-stage setup which is supposed to handle little bumps better, and big bumps just as well as the current STi stuff.
This is not true, the multi-phase valves are for the 04 WRX only, NOT the STi.

I wouldn't describe the STi VII setup as understeer happy. Overall I think it is pretty good, providing you put the 19mm front bar on rather than keeping the 20 (remember the springs were tuned for the 19/20 F/R combo)

The USDM STi should be similar to the MY03 JDM STi but with the "running change" to the front sway bar size.

I would expect good turn in.

Glenn
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Old 04-22-2003, 11:02 PM   #7
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Quote:
Originally posted by Glenn Wallace

The USDM STi should be similar to the MY03 JDM STi but with the "running change" to the front sway bar size.

I would expect good turn in.
Well, I haven't driven a v7, so maybe I shouldn't make such strong assertions. On the other hand, all the tuning tests, mags comparisons, and jdm (best motoring, etc) videos I've seen have one word they always emphasize when talking about the v7 STi, and that word is "understeer". Some of those same sources seem to indicate that the v8 has made a fundamental and major difference in how the STi impreza handles, towards eliminating that understeer.

That's what I wanted for my car, but if it's not possible, I may have to wind up going w/ v7 stuff and doing other things to work around the understeer.

It's not like I come anywhere near harnesssing the full potential of the car even as it is stock, but in the end, I still don't like the stubborn push it always defaults to. I don't want a snap-oversteering animal either though... just balance, which was a term I heard thrown around about the v8 since people started reviewing it.
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Old 04-23-2003, 12:13 AM   #8
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I've never driven on STi suspension I didn't like (V4, 22B, V5, V6,V7....)

Unless you're Gary Sheehan I can't see much benefit in changing the stock setup on the USDM STi.

The same can probably be said for the motor --- the components can delivery more power, but unless you know what you are doing (and can not mess up the drivability that the drive by wire provides) I suspect most mods are going to be retrograde.

I'm hoping they produce an STi specific brochure that would highlight more of the chassis features/changes over the WRX.

Glenn
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Old 04-23-2003, 12:36 AM   #9
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It may be me, but I sense a bit of confusion here.

ForceFed4, you were looking at putting Ver. 8 suspension in an older (than the Ver8 WRX/STi), in hopes of curing the understeer?

If so, then define suspension. If you are talking springs/strut setup, then no, it's not going to do what you want. The changes to the Ver.8 suspension that have reduced/removed understeer have much less to do with the springs/struts than with the front and rear geometry changes. It's how the suspension is attached to the body that has changed, and you probably cannot replicate that without major work.

The ALK kit will do much, much more to reducing understeer and increasing turn in (in conjunction with a good set of front/rear anti-roll bars/links) than a move from ver. 7 to ver.8 STi spring/damper setup.

Cheers,

Paul Hansen
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Old 04-23-2003, 12:54 AM   #10
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Most of the confusion is probably coming from my side, don't worry.

I'm talking about upgrading the suspension of my '02 WRX GDA. I know enough to know I don't have the knowledge to set up a coilover system correctly, and people have said good things about the STi take-off suspension as far as being a "complete" system designed to work together.

That being said, most reviews of the v7 STi , which the current SPT suspension kit is takes its parts from, complain of understeer. So I thought I could just wait until the v8 parts became available and install them instead, since the reviews on the v8 say the car is transformed in that respect.

So it seems I've been a little simplistic in my thinking on this matter, and if what I'm hearing now is correct I'll be more sucessful if I just use v7 struts/springs after all and work on the balance issue by installing an ALK, STi lateral links in the rear, and play with the sway bars?

I hadn't realized that the "hard points" on the v8 car had changed so much that it wouldn't be possible to install the important components into my USDM '02 GDA.
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Old 04-23-2003, 01:15 AM   #11
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Quote:
Originally posted by ForceFed4
I'll be more sucessful if I just use v7 struts/springs after all and work on the balance issue by installing an ALK, STi lateral links in the rear, and play with the sway bars?
IMHO, yes. While the Sti Ver.8 springs/dampers may be a bit better than the Ver. 7, that's one of those "depending on your ride preferences" things, since it's mainly a change in firmness/damping.

I'm not so sure that ver.8 spring/struts would not fit in earlier cars - it's the other parts that bolt up to them that have changed, afaik. No hard data at this moment that I can get my hands on.

And definition of understeer changes from person to person. What for some people is dire understeer is to others mild understeer. Personally, I learned to work around the understeer with left foot braking on the (now) older suspension setups, such as on my car (and I've got a lot into the suspension).

Cheers,

Paul Hansen
www.apexjapan.com
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Old 04-23-2003, 01:10 PM   #12
gtguy
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Quote:
Originally posted by Glenn Wallace


This is not true, the multi-phase valves are for the 04 WRX only, NOT the STi.

Glenn
Call me confused, then. I thought that both WRX and STi got the multi-phase dampers.

Kevin
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