Go Back   Club Lexus Forums > Lexus Model Forums > IS Models > IS - Second Generation > Suspension and Brakes
Sign in using an external account
Register Forgot Password?


Bumpy ride coilovers

Reply
 
 
 
 
Thread Tools Search this Thread Display Modes
Old 05-01-13, 03:41 PM   #1
Deathrow23
Pole Position
Trader Score: (4)
 
Join Date: Aug 2007
Location: St Pete, Florida
Posts: 266
Default Bumpy ride coilovers

Does anyone have an idea why my car now rides bumpy. It's like small bounces. I just purchased bc coilovers with spring rates 14k/10k. From what i have searched, could it be that my springs are too firm? I put my coilovers on full stiff and still rapid small bounces. Could anything else affect this? I never noticed this on my megan ez's.
This ad is not displayed to registered members.
Register your free account today and become a member on Club Lexus!
Deathrow23 is offline   Reply With Quote
Old 05-01-13, 03:55 PM   #2
sm1ke
Lexus Test Driver
Trader Score: (5)
 
sm1ke's Avatar
 
Join Date: Aug 2012
Location: I'm Canadian!
Posts: 1,154
sm1ke_ sm1ke
Default

Quote:
Originally Posted by Deathrow23 View Post
Does anyone have an idea why my car now rides bumpy. It's like small bounces. I just purchased bc coilovers with spring rates 14k/10k. From what i have searched, could it be that my springs are too firm? I put my coilovers on full stiff and still rapid small bounces. Could anything else affect this? I never noticed this on my megan ez's.
The small bounces are a combination of the stiff spring rate and the stiffest damper settings. The dampers are meant to absorb the road impact. When they're set to max stiffness, the dampers absorb as little as possible, which is useful if you're really low or if you're trying to fit really aggressive wheels. If you want a more comfortable ride, you'll have to reduce the stiffness.

Try turning the BCs down 4 clicks at a time until you notice a difference. If that doesn't help, maybe look into 12k springs for the front?
sm1ke is offline   Reply With Quote
Old 05-02-13, 05:48 AM   #3
iRyan
Lexus Champion
Trader Score: (7)
 
iRyan's Avatar
 
Join Date: Feb 2011
Location: South Fl.
Posts: 3,371
ryan.determined iRyan_lexusboys theryanreeves iRyan_3
Default

you have it too stiff....how aggressive are you wheel offsets...if you r not agressive then honestly you only need 24/30 in front and 20-22/30 in the rear...
Plus the 14k spring in the front is already way stiffer than regular...I'm running 12/10
__________________

'14 SLM F-Sport #LexusBoys |Vossen CV7
Instagram: iRyan_3
Club Instagram: LexusBoys

My Current build: http://www.clublexus.com/forums/buil...ort-build.html
My Old Build:
http://www.clublexus.com/forums/is-s...ini-build.html
Vossen PhotoShoot: http://www.clublexus.com/forums/club...oto-shoot.html
iRyan is offline   Reply With Quote
Old 05-02-13, 02:11 PM   #4
Gville350
Lexus Fanatic
Trader Score: (8)
 
Gville350's Avatar
 
Join Date: Mar 2011
Location: South Carolina
Posts: 5,780
Default

WAY TOO STIFF! Loosen up the dampers. I've been DD'ing my BCRs at 18 front/12 rear, and then dropped the rear down to 6 for drag racing at the track last Thurs. I have yet to take the 5 seconds to open the truck and make any adjustments; but sitting on a setting of 6 reminds of how the stock suspension felt...spongy.
__________________
'06 IS350 - 8.6468 @ 81.81MPH
Mods - SRI, BCRs, full GFX kit
Gville350 is offline   Reply With Quote
Old 05-02-13, 03:18 PM   #5
Deathrow23
Pole Position
Trader Score: (4)
 
Join Date: Aug 2007
Location: St Pete, Florida
Posts: 266
Default

Thanks all, yeah I softened up the dampers, to about 5 clicks to full soft. Definitely less bounce but then mkakes the suspension around corners feel to loose. I'll also redo preload and see if that helps
Deathrow23 is offline   Reply With Quote
Old 05-02-13, 06:10 PM   #6
Gville350
Lexus Fanatic
Trader Score: (8)
 
Gville350's Avatar
 
Join Date: Mar 2011
Location: South Carolina
Posts: 5,780
Default

Yeah, the rear end definitely is looser feeling...but its all about the give and take. Play with the settings to find what works for you. The front should be a 3-4 clicks stiffer in my book. If you make the rear too stiff you'll find out you get wheelspin more often too.
__________________
'06 IS350 - 8.6468 @ 81.81MPH
Mods - SRI, BCRs, full GFX kit
Gville350 is offline   Reply With Quote
Old 05-02-13, 06:18 PM   #7
1sWt2GS
Lexus Fanatic
Trader Score: (5)
 
1sWt2GS's Avatar
 
Join Date: Dec 2010
Location: soCAL
Posts: 6,126
Default

wouldn't you crank down the dials, not up if you have too bumpy of a ride.
__________________
2002 Millennium Silver Metallic Sport Design

All Stock

If you got a speeding ticket... You're not low enough.

// \\ All SHOW no GO
1sWt2GS is offline   Reply With Quote
Old 05-03-13, 12:01 PM   #8
Gville350
Lexus Fanatic
Trader Score: (8)
 
Gville350's Avatar
 
Join Date: Mar 2011
Location: South Carolina
Posts: 5,780
Default

^Not really. The "bumpy ride" is being caused by the dampers rebounding too quickly in response to the road conditions (aka, potholes) thus causing a jarring ride quality. Soften up the dampers to slow the response and have a more "OEM ride quality".
__________________
'06 IS350 - 8.6468 @ 81.81MPH
Mods - SRI, BCRs, full GFX kit
Gville350 is offline   Reply With Quote
Old 05-03-13, 12:01 PM
 
 
 
 
Reply

Tags
10k, 14k, 300, bumpy, car, coilover, coilovers, es, lexus, make, quality, ride, ridebumpy, shy, woth

Thread Tools Search this Thread
Search this Thread:

Advanced Search
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
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
CA Tein Comfort Sport Tech Coilovers for IS F 2008+ Just F Me 2Gen IS250 / IS350 / IS-F Classifieds (06-13) 6 05-25-14 01:48 PM
Newbie... help regarding bumpy ride cjcollins GS - Third Generation 9 01-26-14 06:50 AM
Tein Flex Coilovers with EDFC- Thoughts? LexBrett SC 430 12 06-16-13 06:35 PM
Suspension? LexusGo4 RX - Third Generation 6 11-14-12 05:21 PM
Tein SS coilover gs350RWD Suspension 10 08-25-12 11:11 PM

All times are GMT -7. The time now is 12:15 PM.

Join ClubLexus
Advertising


Copyright © 2000-2008 Internet Brands, Inc. All Rights Reserved
Privacy Policy | Disclaimer | Terms of Use | JOBS


Get all contact info