Welcome to the North American Subaru Impreza Owners Club Tuesday December 11, 2018
Home Forums WikiNASIOC Products Store Modifications Upgrade Garage
Click here to visit TireRack
Brakes & Suspension Forum sponsored by The Tire Rack

Losing traction? Need new tires?
Click here to visit the NASIOC Upgrade Garage...
Go Back   NASIOC > NASIOC Technical > Brakes, Steering & Suspension

Welcome to NASIOC - The world's largest online community for Subaru enthusiasts!
Welcome to the NASIOC.com Subaru forum.

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, free of charge, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, so please join our community today!

If you have any problems with the registration process or your account login, please contact us.
* Registered users of the site do not see these ads. 
Reply
 
Thread Tools Display Modes
Old 02-03-2016, 04:15 PM   #1
SpicyPeaNut
Scooby Specialist
 
Member#: 43310
Join Date: Sep 2003
Chapter/Region: SCIC
Location: LA, California
Vehicle:
1978 Brat
Silver

Default GR STI to GR WRX suspension

In my quest to make the STI a more comfortable daily driver I've read posts from 3 different forums and all that people want to tell me is to either deal with the ride (you bought an STI, what did you expect) is the typical response I get. Or spend $3000+ on a set of high end coil-overs. Which may or may not give me a softer ride.

So in my quest to get more enjoyment out of the STI and after reading hundreds of posts online a new thought occurred to me. If I am happy with the ride of a GR WRX (or even the base GR Impreza), why can't I just swap the entire strut assembly.

Well, you can't because the housing on the strut is different between the WRX and STI.

Then I saw a thread of how the strut assembly was taken apart (don't remember if it was an STI or WRX), the spring, and insert were removed completely. Which leads me to my actual question.

Can I take the STI strut apart, and swap the WRX insert and WRX spring into the STI strut housing?

That way I will have a more compliant ride for driving to and from work on the awful 405 freeway everyday.
* Registered users of the site do not see these ads.
SpicyPeaNut is offline   Reply With Quote
Sponsored Links
* Registered users of the site do not see these ads.
Old 02-03-2016, 04:30 PM   #2
mav1c
Hoodbridge!
Moderator
 
Member#: 560
Join Date: Nov 1999
Chapter/Region: MAIC
Location: Woodbridge, VA
Vehicle:
2006 STi, 16 Outback
Crystal Gray, Silver

Default

I would talk to the guys a Feal. They can probably revalve your current struts and get you a "softer" ride.

http://forums.nasioc.com/forums/show....php?t=1930672
mav1c is offline   Reply With Quote
Old 02-03-2016, 04:42 PM   #3
boost junkie
Top Scoob 009
 
Member#: 68273
Join Date: Aug 2004
Chapter/Region: MAIC
Location: IAG Performance
Vehicle:
2012 WRX
GD Race Car

Default

No you can't, different dimensions and the STI fronts are inverted. Talk to Racecomp Engineering about their Bilstein struts. They now offer a "comfort" valving option which would be very comfortable with stock springs.
boost junkie is offline   Reply With Quote
Old 02-03-2016, 05:15 PM   #4
chimchimm5
Scooby Guru
 
Member#: 88501
Join Date: Jun 2005
Chapter/Region: BAIC
Location: NorCal
Vehicle:
2011 WRX Hatch
Dark Grey

Default

Comfort comes from softer springs.

Softer dampers just mean more boingy.
chimchimm5 is offline   Reply With Quote
Old 02-03-2016, 05:52 PM   #5
AndyRoo
Scooby Specialist
 
Member#: 20952
Join Date: Jul 2002
Chapter/Region: MAIC
Location: Baltimore, MD
Vehicle:
BRZ & Datsun
White & White

Default

Quote:
Originally Posted by chimchimm5 View Post
Comfort comes from softer springs.

Softer dampers just mean more boingy.


Nope. It's not quite that straightforward.
AndyRoo is offline   Reply With Quote
Old 02-03-2016, 06:30 PM   #6
boost junkie
Top Scoob 009
 
Member#: 68273
Join Date: Aug 2004
Chapter/Region: MAIC
Location: IAG Performance
Vehicle:
2012 WRX
GD Race Car

Default

Quote:
Originally Posted by chimchimm5 View Post
Comfort comes from softer springs.

Softer dampers just mean more boingy.
Yeah no.
boost junkie is offline   Reply With Quote
Old 02-03-2016, 06:38 PM   #7
SpicyPeaNut
Scooby Specialist
 
Member#: 43310
Join Date: Sep 2003
Chapter/Region: SCIC
Location: LA, California
Vehicle:
1978 Brat
Silver

Default

Quote:
Originally Posted by mav1c View Post
I would talk to the guys a Feal. They can probably revalve your current struts and get you a "softer" ride.

http://forums.nasioc.com/forums/show....php?t=1930672
I completely forgot about Feal. I was hoping to just swap the inserts but it sounds like that will not be an option.

Quote:
Originally Posted by boost junkie View Post
No you can't, different dimensions and the STI fronts are inverted. Talk to Racecomp Engineering about their Bilstein struts. They now offer a "comfort" valving option which would be very comfortable with stock springs.
That is another great option but I think this would be more expensive than having Feal re-valve the stock shocks.

Quote:
Originally Posted by chimchimm5 View Post
Comfort comes from softer springs.

Softer dampers just mean more boingy.
Quote:
Originally Posted by AndyRoo View Post


Nope. It's not quite that straightforward.
Quote:
Originally Posted by boost junkie View Post
Yeah no.
If I had Feal re-valve the STI inserts, would a softer spring (WRX vs STI) give a non-bouncy softer ride than using the STI springs?
SpicyPeaNut is offline   Reply With Quote
Old 02-04-2016, 10:46 AM   #8
boost junkie
Top Scoob 009
 
Member#: 68273
Join Date: Aug 2004
Chapter/Region: MAIC
Location: IAG Performance
Vehicle:
2012 WRX
GD Race Car

Default

When properly damped, the STI springs should be plenty soft. WRX rates will be too low for the car's weight and could actually give you worse ride quality by sending the dampers into the bump stops too often. This chassis is pretty travel challenged in the rear so you need a bit of spring rate to keep you off the stops.
boost junkie is offline   Reply With Quote
Old 02-04-2016, 02:05 PM   #9
chimchimm5
Scooby Guru
 
Member#: 88501
Join Date: Jun 2005
Chapter/Region: BAIC
Location: NorCal
Vehicle:
2011 WRX Hatch
Dark Grey

Default

Quote:
Originally Posted by AndyRoo View Post


Nope. It's not quite that straightforward.
Just for clarification, so you can make a 10k spring "comfortable" just by changing the valving to a "softer" profile?
chimchimm5 is offline   Reply With Quote
Old 02-04-2016, 02:09 PM   #10
Waddlz
Scooby Newbie
 
Member#: 395275
Join Date: Jul 2014
Chapter/Region: RMIC
Location: Brighton, CO
Vehicle:
2012 STi
SWP

Default

I didn't realize the stock GR STi suspension was uncomfortable. I guess driving around a previous car that was lowered has made me think its luxury lol
Waddlz is offline   Reply With Quote
Old 02-04-2016, 02:31 PM   #11
AndyRoo
Scooby Specialist
 
Member#: 20952
Join Date: Jul 2002
Chapter/Region: MAIC
Location: Baltimore, MD
Vehicle:
BRZ & Datsun
White & White

Default

Quote:
Originally Posted by chimchimm5 View Post
Just for clarification, so you can make a 10k spring "comfortable" just by changing the valving to a "softer" profile?
If you have a car with 10k springs, you can usually make it more comfortable with a "different" valving profile. This might mean a compromise with handling, but many coilovers out there aren't valved very well to begin with so it's certainly possible to improve both with either a revalve or different shocks.

Changing to softer springs might also make it more comfortable. Sometimes this is the way to go (as long as the car has the travel and valving to match).

FWIW I've ridden/driven many cars with 10k springs that rode better than stock STIs.
AndyRoo is offline   Reply With Quote
Old 02-04-2016, 03:16 PM   #12
chimchimm5
Scooby Guru
 
Member#: 88501
Join Date: Jun 2005
Chapter/Region: BAIC
Location: NorCal
Vehicle:
2011 WRX Hatch
Dark Grey

Default

Quote:
Originally Posted by AndyRoo View Post
If you have a car with 10k springs, you can usually make it more comfortable with a "different" valving profile. This might mean a compromise with handling, but many coilovers out there aren't valved very well to begin with so it's certainly possible to improve both with either a revalve or different shocks.

Changing to softer springs might also make it more comfortable. Sometimes this is the way to go (as long as the car has the travel and valving to match).

FWIW I've ridden/driven many cars with 10k springs that rode better than stock STIs.
I see what you're saying.

So while magic God-damper valving can make a stiffly sprung care "comfortable", isn't it easier, cheaper, and less trial&error prone to just go with a softer spring and more readily available dampers?
chimchimm5 is offline   Reply With Quote
Old 02-04-2016, 03:25 PM   #13
AndyRoo
Scooby Specialist
 
Member#: 20952
Join Date: Jul 2002
Chapter/Region: MAIC
Location: Baltimore, MD
Vehicle:
BRZ & Datsun
White & White

Default

Quote:
Originally Posted by chimchimm5 View Post
I see what you're saying.

So while magic God-damper valving can make a stiffly sprung care "comfortable", isn't it easier, cheaper, and less trial&error prone to just go with a softer spring and more readily available dampers?
They don't have to be magic dampers but it helps if they don't completely suck.

An example is the current 2016 WRX. The springs are much stiffer than a 2004 STI and yet it rides so much better. The 2016 shocks aren't amazing, but they're okay enough.

BUT yes with a softer spring you can get away with a more average shock. Stiffer springs require IMO a good quality shock.

- Andrew
AndyRoo is offline   Reply With Quote
Old 02-04-2016, 04:21 PM   #14
jamal
Scooby Guru
 
Member#: 71875
Join Date: Oct 2004
Location: Montana
Default

I have been in some really stiffly sprung cars that actually rode nicely because the shock were set up well.

One was a lancer ralliart with some revalved kw clubsports, I think the front springs were something like 16k, and it was low. Was one of those loaner cars mitsu gave out years ago and was being daily driven by the shop owner's wife, a middle-aged school teacher.

I think a big part is having a more digressive curve, so good low speed control and then keeping the high speed forces from getting excessive, and also having a shock that works at low speeds and displacements. Cheaper shocks just tend to not have that. If you read the jrz guy's wierd, rambling, typo-filled book (vehicle dynamics and damping), he spends a lot of time on that.

Last edited by jamal; 02-04-2016 at 04:27 PM.
jamal is online now   Reply With Quote
Old 12-06-2018, 02:48 PM   #15
mattagaffer
Scooby Newbie
 
Member#: 177888
Join Date: Apr 2008
Chapter/Region: SCIC
Location: LA
Vehicle:
2002 Bugeye
Wagon

Default

Quote:
Originally Posted by SpicyPeaNut View Post
I completely forgot about Feal. I was hoping to just swap the inserts but it sounds like that will not be an option.

That is another great option but I think this would be more expensive than having Feal re-valve the stock shocks.

If I had Feal re-valve the STI inserts, would a softer spring (WRX vs STI) give a non-bouncy softer ride than using the STI springs?
Did you ever find a solution to your problem? I'm in the same boat.

If you did go with Feal, what's your impression and did you also change springs?

I was thinking of adding the new king springs that raise the chassis an inch. They're 20% stiffer overall but they're progressive. I was thinking this, combined with extra height and softer shock might create a softer ride despite the stiffer overall spring.
mattagaffer is online now   Reply With Quote
Old 12-06-2018, 03:07 PM   #16
jamal
Scooby Guru
 
Member#: 71875
Join Date: Oct 2004
Location: Montana
Default

Do you have a GR or an 02 wrx? The suspension options are different depending on which and this thread was about the newer cars. Racecomp Engineering's Bilsteins would be a good option for an 08+

If you have an 02, just new shocks would be a good start, even if they're not fancy. KYB excel-gs for example or AGXes if you want something adjustable. Or tokico d-specs if you can find a set. They've been on clearance for awhile and my source just ran out. Oakos might have a couple left?
jamal is online now   Reply With Quote
Old 12-06-2018, 03:12 PM   #17
SirBrass
Scooby Specialist
 
Member#: 207263
Join Date: Apr 2009
Chapter/Region: Tri-State
Location: Northern PA
Vehicle:
2019 WRX Limited
World Rally Blue

Default

Here's an idea: Go with 1" smaller rims but go with a tire that'll keep your overall diameter the same. Thus, more sidewall. More sidewall = more cushion.

Might take some of the edge off of the ride.
SirBrass is offline   Reply With Quote
Old 12-06-2018, 03:19 PM   #18
mattagaffer
Scooby Newbie
 
Member#: 177888
Join Date: Apr 2008
Chapter/Region: SCIC
Location: LA
Vehicle:
2002 Bugeye
Wagon

Default

Quote:
Originally Posted by SirBrass View Post
Here's an idea: Go with 1" smaller rims but go with a tire that'll keep your overall diameter the same. Thus, more sidewall. More sidewall = more cushion.

Might take some of the edge off of the ride.
Mine is a GR - 2013 hatch...

I was thinking that as well, especially for the smaller undulations. I may go both routes but I figured I'd start here.
mattagaffer is online now   Reply With Quote
Old 12-06-2018, 07:07 PM   #19
SpicyPeaNut
Scooby Specialist
 
Member#: 43310
Join Date: Sep 2003
Chapter/Region: SCIC
Location: LA, California
Vehicle:
1978 Brat
Silver

Default

Quote:
Originally Posted by mattagaffer View Post
Did you ever find a solution to your problem? I'm in the same boat.

If you did go with Feal, what's your impression and did you also change springs?

I was thinking of adding the new king springs that raise the chassis an inch. They're 20% stiffer overall but they're progressive. I was thinking this, combined with extra height and softer shock might create a softer ride despite the stiffer overall spring.
Thanks for the reply. I actually never did. I went so far as to buy another stock sti set of springs/struts but sold them rather than having them re valved. Please keep us posted on the thread should you decide to go with any of the suggestions found here & how it works out.
SpicyPeaNut is offline   Reply With Quote
Old Today, 09:51 PM   #20
mattagaffer
Scooby Newbie
 
Member#: 177888
Join Date: Apr 2008
Chapter/Region: SCIC
Location: LA
Vehicle:
2002 Bugeye
Wagon

Default

Turns out Feal doesn't revalve GR struts anymore. They suggested their 441 max travel coilover but with 6k springs I can't imagine the ride will be smoother than stock, especially with a pillowball top mount. So back to square one...

Anyone tried the cusco struts?
mattagaffer is online now   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump

All times are GMT -4. The time now is 10:36 PM.


Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2018, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2018 Axivo Inc.
Copyright ©1999 - 2017, North American Subaru Impreza Owners Club, Inc.