Welcome to the North American Subaru Impreza Owners Club Sunday February 17, 2019
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 03-05-2007, 10:00 PM   #1
akinasdevil
Scooby Specialist
 
Member#: 61050
Join Date: May 2004
Chapter/Region: SCIC
Location: SoCal
Vehicle:
2004 STi
72 Corona

Talking STi/Yamaha Performance Dampers

I just read another post about these, so seeing as there is some interest in them here is my first parts review on NASIOC, so I hope you guys enjoy this!

I have an 04 STi that I picked up in December of 2003. I've only done suspension work on her, as I need a reliable car and feel that the stock power is more than enough for me to get in trouble with. My first track day is coming up in May, other than that she is daily driven. Got these a couple of weeks ago from Adam at Z1. Great vendor!

My car is daily driven and I really wanted to try these out.




Prior set up with Cusco lower sub frame bar V.2 and rear carbon fiber strut bar with "V" brace.
I really liked this setup, especially the subframe bar, as it really takes the flex out of the factory subframe, which to be honest I really miss.






Installed these on the 23rd of last month so I've had them in for almost 2 weeks now.




For the short amount of time I've had these on I have definitely felt a difference over the Cusco bits. The car flexes more but is more compliant over bumps and imperfections in the road. As it would be without the Cusco pieces but feels controlled and stable. In a staight line noise and vibration are slightly reduced(of course taking off the cusco parts helped there), but in a turn is where these things shine.

Again this is my daily driver and I'm no professional driver by any means, but I feel more connected to the road with the STi/Yamaha parts installed. Feed back from what the car is doing is improved with these strut dampers. I actually thought it would be the opposite, with built in dampers absorbing shock thoughout the chasis and dulling the driving feel, but it's not.

Great product from the collaboration between STi and Yamaha, these should be an option on all STi's.
* Registered users of the site do not see these ads.

Last edited by akinasdevil; 03-05-2007 at 10:57 PM.
akinasdevil is offline   Reply With Quote
Sponsored Links
* Registered users of the site do not see these ads.
Old 03-06-2007, 02:21 AM   #2
chimchimm5
Scooby Guru
 
Member#: 88501
Join Date: Jun 2005
Chapter/Region: BAIC
Location: NorCal
Vehicle:
2011 WRX Hatch
Dark Grey

Default

THANK YOU VERY MUCH!! Your's is the first review with the FRONT damper. And thank you for the pics! I was worried that since the front is outside of the car, it would lower the clearance. But I see that it is nicely tucked at the same level as the subframe. I am sooooo ready to buy this thing.

Did you try them one at a time or both together?

From a TRACTION standpoint, which did you feel did the better job: the cusco parts or the dampers?

Since you haven't yet done your first track day; have you done autox or any other high performance driving?
chimchimm5 is offline   Reply With Quote
Old 03-06-2007, 09:38 AM   #3
Aciskies
Scooby Newbie
 
Member#: 141076
Join Date: Feb 2007
Location: SG.... not in the states
Vehicle:
2005 WRX 2.0L
Rally Blue

Default

wow.. first time i've seen this.
Aciskies is offline   Reply With Quote
Old 03-06-2007, 11:50 AM   #4
Butt Dyno
Street's closed, pizza boy
 
Member#: 17301
Join Date: Apr 2002
Chapter/Region: MAIC
Location: NoVA
Vehicle:
2016 FoST ST3
2006 Evo #17 STU

Default

Can you take a better picture of how the front one mounts?
Butt Dyno is offline   Reply With Quote
Old 03-06-2007, 08:44 PM   #5
akinasdevil
Scooby Specialist
 
Member#: 61050
Join Date: May 2004
Chapter/Region: SCIC
Location: SoCal
Vehicle:
2004 STi
72 Corona

Default

Quote:
Originally Posted by chimchimm5 View Post
THANK YOU VERY MUCH!! Your's is the first review with the FRONT damper. And thank you for the pics! I was worried that since the front is outside of the car, it would lower the clearance. But I see that it is nicely tucked at the same level as the subframe. I am sooooo ready to buy this thing.

Did you try them one at a time or both together?

From a TRACTION standpoint, which did you feel did the better job: the cusco parts or the dampers?

Since you haven't yet done your first track day; have you done autox or any other high performance driving?
First I drove the car with the Cusco bits, then with nothing, and finally with both dampers installed together(figured they would work better in tandem).

Personally I like the overall feel the dampers give, as I feel they give more feedback from what the car is doing. Again I do miss the rigidness that the Cusco Subframe bar gave the car.

Nope, no track days or autoX, as I'm usually fairly busy, just some spirited driving here and there. My driving limit is found far before the my car's I'm sure when I go for a fun run.
Quote:
Originally Posted by ButtDyno View Post
Can you take a better picture of how the front one mounts?
Does this help? I also have the transmission cover which most people don't have which also gives a vagueness as to where it's mounted.


akinasdevil is offline   Reply With Quote
Old 03-06-2007, 08:54 PM   #6
chimchimm5
Scooby Guru
 
Member#: 88501
Join Date: Jun 2005
Chapter/Region: BAIC
Location: NorCal
Vehicle:
2011 WRX Hatch
Dark Grey

Default

Did it come with mounting instructions? They look (especially the front) asymetrical which might indicate you need to put one side on the driver's side specifically. And that's different between JDM and USDM, obviously.

I know it can easily be mounted either way, but do the instructions specify a particular orientation?
chimchimm5 is offline   Reply With Quote
Old 03-06-2007, 09:21 PM   #7
akinasdevil
Scooby Specialist
 
Member#: 61050
Join Date: May 2004
Chapter/Region: SCIC
Location: SoCal
Vehicle:
2004 STi
72 Corona

Default

Instructions are all in Japanese with a couple of pics, so I went by the pics. And yes, they are asymetrical because they are basically struts with a dust cover.

I also tried compressing them with my bare hands, which I wasn't able to do so they are fairly rigid. I wasn't about to put them on the ground with all my weight just to try to compress them and possibly mess one up in the process.
akinasdevil is offline   Reply With Quote
Old 03-06-2007, 09:29 PM   #8
Mind
Scooby Specialist
 
Member#: 109216
Join Date: Mar 2006
Chapter/Region: MAIC
Location: PA
Vehicle:
08 STI DGM
76-77 Lancia Scorpion(s)

Default

Great stuff. I'm glad to see a good writeup of these. From your descriptions, it seems to add rigidity, and maybe filter out some of the higher frequency 'noise'... sound like you've just increased you S/N!
Mind is offline   Reply With Quote
Old 03-06-2007, 09:55 PM   #9
chimchimm5
Scooby Guru
 
Member#: 88501
Join Date: Jun 2005
Chapter/Region: BAIC
Location: NorCal
Vehicle:
2011 WRX Hatch
Dark Grey

Default

akinasdevil, what kind of springs/struts do you have, what kind of top hats, and what kind of bushings if any were replaced?

It looks like you did sway bars and lateral links.

Do you have a front upper strut bar?
chimchimm5 is offline   Reply With Quote
Old 03-06-2007, 10:27 PM   #10
akinasdevil
Scooby Specialist
 
Member#: 61050
Join Date: May 2004
Chapter/Region: SCIC
Location: SoCal
Vehicle:
2004 STi
72 Corona

Default

I haven't replaced any bushings, as I've done this before with an Energy Suspension master kit on older Honda I used to own and would not recommend it for a daily driver. It's just too harsh for my tastes.
I'm running:
stock struts
JDM Pink springs
Group N strut tops
front upper strut bar
Cusco trailing arms and lateral links.
Cusco sways F & R
akinasdevil is offline   Reply With Quote
Old 09-03-2015, 09:54 PM   #11
STI_SLC
Scooby Specialist
 
Member#: 111450
Join Date: Apr 2006
Chapter/Region: RMIC
Location: SL,UT.
Vehicle:
06 WRB_STi

Default

revived this to see if anyone has an updated opinion on these..
i just looked up the shop.. $500+ just for the rear, $1k for the combo?
seems a bit steep...
STI_SLC is offline   Reply With Quote
Old 09-04-2015, 03:01 AM   #12
chimchimm5
Scooby Guru
 
Member#: 88501
Join Date: Jun 2005
Chapter/Region: BAIC
Location: NorCal
Vehicle:
2011 WRX Hatch
Dark Grey

Default STi/Yamaha Performance Dampers

I eventually got the front. You can barely feel it, but it does seem to improve things. Really hard to tell though.

It had a lot of cool factor that it was a genuine s204 piece.

Eventually I took it off and sold it because I was rallyx'ing and didn't want to destroy it.

It's not "worth" the price. But the price is for the rarity of it.
chimchimm5 is offline   Reply With Quote
Old 09-04-2015, 01:21 PM   #13
mrsaturn7085
Scooby Specialist
 
Member#: 375462
Join Date: Dec 2013
Chapter/Region: NWIC
Location: Portland, OR
Vehicle:
2006 Impreza WRX STI
WR Blue

Default

The S204 tried to strike a balance between performance and luxury. These pieces were designed to tighten up a few places on the car without going all-out and installing solid bars like the RA-R.

In the front, the solid pink RA-R bar is a much more sensible option for 20% the price of the Yamaha dampers.



In the rear, you can't exactly install the Spec C/RA-R trunk bar in a USDM chassis, but a cheap-o eBay bar will perform about the same as the Yamaha damper. By "perform the same", I really mean "won't really do anything" since bridging the strut towers with a bar with two bolts in double shear does jack for limiting motion, especially when the chassis is bridges the area immediately above the towers as-is.

I mean really now... which do you think is a more solid component in the following image? The silver damper, or the giant blue piece of box steel right above it:

mrsaturn7085 is offline   Reply With Quote
Old 09-05-2015, 10:35 PM   #14
STI_SLC
Scooby Specialist
 
Member#: 111450
Join Date: Apr 2006
Chapter/Region: RMIC
Location: SL,UT.
Vehicle:
06 WRB_STi

Default

ha... i feel you on that. ^
STI_SLC is offline   Reply With Quote
Old 09-07-2015, 12:20 AM   #15
chimchimm5
Scooby Guru
 
Member#: 88501
Join Date: Jun 2005
Chapter/Region: BAIC
Location: NorCal
Vehicle:
2011 WRX Hatch
Dark Grey

Default

I think the point is being lost on these things.

No chassis, no matter how stiff, is perfectly stiff. There is always some resonance frequency to it. It's just that as you stiffen it up, the frequency gets higher which is usually a good thing for this application. There is a point where stiffening effectively becomes ineffective; and you're stuck at the resonance frequency.

I think the Yamaha dampers are aimed at dampening this frequency (or close to it). So while it probably doesn't stiffen the rear (as pictured above) it does address the chassis oscillations.

The same part in a wagon would contribute to stiffening as well as damping. And the front version does both to both body styles.

Hypothetically speaking.

Is there a practical improvement? I dunno.
chimchimm5 is offline   Reply With Quote
Old 09-07-2015, 04:20 AM   #16
mrsaturn7085
Scooby Specialist
 
Member#: 375462
Join Date: Dec 2013
Chapter/Region: NWIC
Location: Portland, OR
Vehicle:
2006 Impreza WRX STI
WR Blue

Default

While admitting there is some merit to what you've said, I'm going to call BS on your assumption that this is why Subaru made these dampers.

If the dampers were for performance, the RA-R would have gotten them in addition to the S204. They're to tighten the car up while avoiding some of the squeaks a solid bar would cause. People that drop extra coin for luxury generally frown upon squeaks and such.
mrsaturn7085 is offline   Reply With Quote
Old 09-07-2015, 04:45 AM   #17
lukethedork
Scooby Newbie
 
Member#: 326146
Join Date: Jul 2012
Default

A solid bar does not cause squeaks.
lukethedork is offline   Reply With Quote
Old 01-22-2019, 12:42 AM   #18
wrxchete
Scooby Newbie
 
Member#: 472953
Join Date: Aug 2017
Chapter/Region: International
Location: Panama City, Panama
Vehicle:
2017 WRX '17
WRB

Default

I believe it has more to do with reducing vibrations. Many luxry cars are equipped with these dampers. Moreover, the TC380 is equipped with these dampers. I dont think that it is a BS part, when the fastest car subaru has made has these.
wrxchete is offline   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

Similar Threads
Thread Thread Starter Forum Replies Last Post
STI Yamaha Damper, where to buy??? El Vocho Interior & Exterior Modification 4 07-28-2009 11:43 AM
FS SoCal: STI/Yamaha S204 Dampers STI'sOnly Suspension/Brakes/Handling 45 04-25-2009 05:54 AM
FS: NJ: S204 Rear Yamaha Strut Damper lilneel12 Tri-State Area Private Classifieds 6 04-11-2009 06:17 PM
FS: (sfbay) s204 Yamaha performance damper front chimchimm5 Suspension/Brakes/Handling 6 04-09-2009 09:14 AM
FS: NJ: S204 Rear Yamaha Strut Damper lilneel12 Suspension/Brakes/Handling 1 04-01-2009 10:08 AM

All times are GMT -4. The time now is 01:15 AM.


Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2019, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2019 Axivo Inc.
Copyright ©1999 - 2017, North American Subaru Impreza Owners Club, Inc.