springs
Pole Position
Joined: Mar 2001
Posts: 321
Likes: 0
no stupid questions
you can keep the oem shocks, but most folks change the shocks at the same time to save on labor costs. Since the new springs will lower the car a bit, the oem shocks may wear a little quicker.
Be careful of changing to aftermarket springs b/c alot of folks complain about ride harshness. Although, others have responded liking the Eibachs. JMHO, I'm pretty happy with the stock setup - not too harsh and not soft at all. I am pondering some Tokicos in combination w/ oem springs myself. The only reason why I am changing shocks is due to regular maintenance (it's that time....)
Be careful of changing to aftermarket springs b/c alot of folks complain about ride harshness. Although, others have responded liking the Eibachs. JMHO, I'm pretty happy with the stock setup - not too harsh and not soft at all. I am pondering some Tokicos in combination w/ oem springs myself. The only reason why I am changing shocks is due to regular maintenance (it's that time....)
Lead Lap
Joined: Feb 2001
Posts: 439
Likes: 6
From: Bay area, California
I changed to Eibach Pro/Tokico combination for about two months. Now I'm going back to the factory.
The problem is I found the combination to be too harsh. It's just not tuned properly. The OEM spring/shocks is, in my opinion, excellent. It would be nice if it's lower and firmer but that's up the the suspension engineers to tune both.
If you have to use Eibach I find it works better with the OEM shocks. I guess Eibach designed the springs for the oem shocks, not Tokico.
The problem is I found the combination to be too harsh. It's just not tuned properly. The OEM spring/shocks is, in my opinion, excellent. It would be nice if it's lower and firmer but that's up the the suspension engineers to tune both.
If you have to use Eibach I find it works better with the OEM shocks. I guess Eibach designed the springs for the oem shocks, not Tokico.
Last edited by sc400; May 30, 2001 at 10:31 PM.
Lexus Test Driver
Joined: Feb 2001
Posts: 1,185
Likes: 6
From: California
Eibach springs are not designed for the stock shocks.
If you understand the actual function and action/reaction of a spring in an automotive suspension application, you would know that a higher rate spring demands more damping to control the suspension movement.
Due to different uses and constantly changing road conditions, there is no ideal situation when it comes to springs and shocks, unless you are in a controlled race-only environment.
Stock shocks are definitely not a good match for aftermarket springs, but they are acceptable if it is not within your budget to change them. Do note that they will wear out faster due to the increase spring rate, as the springs jounce and rebound considerably faster than the softly sprung stock springs. This accelerated movement in the shock assembly itself is what causes the shocks to wear out, mainly due to increased operating temperatures of the internal fluids.
Worn out shocks usually call for replacement anyways once you can't stand driving the car anymore, at which point most people are able to scrape up the cash from here or there to change them.
Todd M.
TM Engineering
http://www.tmengineering.net
If you understand the actual function and action/reaction of a spring in an automotive suspension application, you would know that a higher rate spring demands more damping to control the suspension movement.
Due to different uses and constantly changing road conditions, there is no ideal situation when it comes to springs and shocks, unless you are in a controlled race-only environment.
Stock shocks are definitely not a good match for aftermarket springs, but they are acceptable if it is not within your budget to change them. Do note that they will wear out faster due to the increase spring rate, as the springs jounce and rebound considerably faster than the softly sprung stock springs. This accelerated movement in the shock assembly itself is what causes the shocks to wear out, mainly due to increased operating temperatures of the internal fluids.
Worn out shocks usually call for replacement anyways once you can't stand driving the car anymore, at which point most people are able to scrape up the cash from here or there to change them.
Todd M.
TM Engineering
http://www.tmengineering.net
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Having those part number references handy is helpful but I think you'll need to be more specific about what each of them refers to.
I can move your post question to the GS 3rd Gen suspension sub-forum if you'd like?
Driver
Joined: Nov 2019
Posts: 66
Likes: 5
From: Valladolid
This would be a question to post in the Lexus GS 3rd Gen (2006-2011) Suspension sub-forum. Or to Summit Racing or KYB themselves. In the SC 1st gen forum only know the compatibility of these for the 1992-2000 SC, 1991-2000 Soarer and 1993-2002 Supra.
Having those part number references handy is helpful but I think you'll need to be more specific about what each of them refers to.
I can move your post question to the GS 3rd Gen suspension sub-forum if you'd like?
Having those part number references handy is helpful but I think you'll need to be more specific about what each of them refers to.
I can move your post question to the GS 3rd Gen suspension sub-forum if you'd like?
Actually my apologies. I am unable to move your post to the appropriate GS 3rd gen suspension sub-forum. I would recommend making a new thread there with the same part number information you posted here for reference. There someone will be able to say one way or the other if KYB Excel G shocks are available for your GS. Either that or an alternative aftermarket shock and spring combination can be recommended that works with your generation GS.
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