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Old 03-15-2001, 04:42 PM   #1
PRODRIVEN
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Member#: 111
Join Date: Jul 1999
Location: Cincinnati - San Diego
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1999 Impreza 2.5 RS
EJtwentyfied -> '04 STi

Post V5 Springs/struts . . . What else do I need?

My Sti springs and struts came today (Thanks Lisa!) I now have two options:

1.)Install using all existing hardware. This would involve taking apart old suspension. I would have to pay someone to do this because I don't have the tools to do it. How much did this cost for people that took this route? OR . . .

2.)Buy new hardware and get someone to assemble the struts/springs and I can put them in myself. What parts will I need? (topmounts, dust covers, what else?)

Which way should I go? If I get all new hardware I could get Sti topmounts. Are these worth the $260-$320 price. What advantages do they have?
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Old 03-15-2001, 04:58 PM   #2
peepshow
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The STi topmounts are A LOT stiffer than the stock RS topmounts. These will allow you suspension to work more effectively. The soft topmounts will effectively reduce the amount of damping in your suspension because they are soft and flex. I hope that makes sense. Don't know if they are worth the $$$, I don't have them, yet. Anyone else care to add?
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Old 03-15-2001, 05:39 PM   #3
Charge
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Hey, what tools do you need? My dad has a few air tools...have to verify what he's got. I know he's got a HUGE tank, and like a 18hp compressor. 3 car garage as well, we could free up two bays I'm sure. I'd love to see this install sometime, as I'm interested in the same setup myself. Let me know, maybe Jason would want to help?

I'll talk to you this weekend...if I make the AutoX...see my post in Midwest...

Neil
who's sulking at going w/o his RS...
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Old 03-15-2001, 05:56 PM   #4
North Ursalia
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<FONT face="Comic Sans MS">You will need (among other things):

17 mm socket with a pass-through ratchet
6mm (or is it 8mm) allen or hex key
Spring compressors (at least one pair)

Stuff to reuse or buy new:
Dust boots
Bump stops
Rubber spring isolators
Spring hat
Spring hat washer
Top hat
Top hat nut

Peaty (I think, might be someone else) has a diagram of the whole stock suspension... I have it, but it's not scanned in.

Brian
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Old 03-16-2001, 05:06 AM   #5
JGard
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NU, you can't use (and don't need) the bump stops from the stock RS suspension on the V5. A: it doesn't even fit, and B: the V5's bump stop is inside the strut itself.
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Old 03-16-2001, 06:22 AM   #6
Peaty
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Azurite Blue Pearl

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some info here:
http://www.azscooby.com/mods/AZScooby/Peaty/p1.php

One word of caution. The rear spring perch on the strut(the round sticky out thing)that the bottom of the spring sits on has a rubber cusion. You'll need to remove it from the old strut and put it on the new strut's perch. Do this before you put the strut together. There are rubber tabs on the bottom that will match up with holes on the new strut perch to hold it in place. I made the mistake of installing the whole strut then realizing I forgot it. The fronts don't have this cusion only the rear. I have a sneaking suspicion that people that say their car sits lower in the back than the front after they install struts may have left this out. It is pretty thick. Just a theory though

Also the bump stop you see on the old strut is now inside the strut because it's inverted:

<IMG SRC="http://albums.photopoint.com/j/View?u=1471714&a=11073907&p=39263062" border=0>

Peaty
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Old 03-16-2001, 08:30 AM   #7
PRODRIVEN
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EJtwentyfied -> '04 STi

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I think I will get the Sti mounts. So I don't need to get bump stops? They are already inside the new struts, right. How much would all these parts cost. It will be a hell of a lot easier if i don't have to disassmeble my old suspension. Dust covers and washers shouldn't be expensive, but what about the perches?
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Old 03-16-2001, 10:41 AM   #8
mrbell
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what perches are you refering to? The spring perches part of the strut... that's pretty much what a strut is, as opposed to a shock...
Anyway, I put the rubber cusion in, and my car was lowered more in the back than the front... i don't think that rubber thing does much except reduce vibration. it is just a piece of soft rubber w/ 700lbs sitting on it... it probably gets sqaushed pretty flat... I doubt it makes more than 1/16th of an inch of difference...
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Old 03-16-2001, 11:11 AM   #9
DigDug
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Talking

I have the STi group N upper mounts with a *much* stiffer suspension setup. Made a very noticable difference, but I still think the bigger improvement can be realized by getting the STi group N front LCA frame mount bushings. They can be purchased separately from the whole group N kit (which is outrageously overpriced) for a pretty reasonable price from Cobb.
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Old 03-16-2001, 04:22 PM   #10
PRODRIVEN
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1999 Impreza 2.5 RS
EJtwentyfied -> '04 STi

Post

I meant upper spring seat. I checked out the diagram posted in that other v5 thread (I think Ridinlow had it) nad I need #17-23:
dust seal
stut mount
spacer
upperspring mount
rubber seat
dust cover
helper
bolts

Can I just go to the dealer and get these parts for an RS suspenison and they should fit the v5? What about the rears? Do they use the same parts as the fronts, so I can get all of the above x4?
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Old 03-16-2001, 04:30 PM   #11
PRODRIVEN
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EJtwentyfied -> '04 STi

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just checked out the diagram again, and I don't see the "rubber cushion" for the bottom of the spring. I see one for the top, but not the bottom
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Old 03-16-2001, 05:23 PM   #12
Peaty
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Azurite Blue Pearl

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the rear has the rubber cusion for the perch not the front. The pic is just for the front suspension. The rear is pretty much the same with that exception. It's gonna be costly to get all the extra parts. I say just do the swap of what you have to reuse. It's not all that hard to do. The upper mounts alone cost 80 each from the dealer.
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Old 03-17-2001, 05:21 AM   #13
Peaty
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Azurite Blue Pearl

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Here is a pic showing where the cushion is. Personally I think it's needed. They designed the suspension with it in there. Also I think it's thicker than 1/16" even with the spring sitting on top. It's a strong rubber otherwise it wouldn't last long in there. Here you can see it peeking out of the top of the perch. You can tell if it's installed or not. The OEM one has the tabs sticking out and the P1 dosen't. Because of the angle of the shot you can only see a little of the cushion above the perch:

<IMG SRC="http://albums.photopoint.com/j/View?u=1471714&a=11073907&p=43955402" border=0>

Peaty
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Old 03-17-2001, 01:50 PM   #14
PRODRIVEN
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EJtwentyfied -> '04 STi

Post

Thanks Peaty for the diagrams and pics. Those are helpful. That yellow thing on the original strut is the bumpstop right? I am going to the dealer to get numbers and prices on all the neccesary parts. I think I will get the Sti topmounts. I am afraid those upper spring mounts might be kind of pricey though (aside from the top mounts ofcourse). It will probably cost $300 to pay someone to switch the struts/springs over so I may as well price out the other parts. It may be cheaper if I can do it myself and don't have to worry about taking apart the old suspension
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