E46 BMW Social Directory E46 FAQ 3-Series Discussion Forums BMW Photo Gallery BMW 3-Series Technical Information E46 Fanatics - The Ultimate BMW Resource BMW Vendors General E46 Forum The Tire Rack's Tire Wheel Forum Forced Induction Forum The Off-Topic The E46 BMW Showroom For Sale, For Trade or Wanting to Buy

Welcome to the E46Fanatics forums. E46Fanatics is the premiere website for BMW 3 series owners around the world with interactive forums, a geographical enthusiast directory, photo galleries, and technical information for BMW enthusiasts.

You are currently viewing our boards as a guest which gives you limited access to view most discussions and access our other features. By joining our free community 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 fast, simple and absolutely free so please, join our community today!

If you have any problems with the registration process or your account login, please contact contact us.

Go Back   E46Fanatics > Tuning & Tech > Suspension & Braking Forum by BimmerWorld

Suspension & Braking Forum by BimmerWorld
Have some questions about suspension or brake setups for your E46 BMW? Get all your answers here!
Sponsored by BimmerWorld

Reply
 
Thread Tools Search this Thread Rating: Thread Rating: 1 votes, 5.00 average. Display Modes
Old 09-30-2012, 04:06 PM   #21
Mc 007
Registered User
 
Join Date: Nov 2006
Location: Cittanova d'Istria-Croazia(Europa)
Posts: 2,227
My Ride: 325ci Performance
Quote:
Originally Posted by Stinger9 View Post
Chart for comparing Sway Bars
Eibach front 27mm
__________________
Mc 007 is offline   Reply With Quote
Old 09-30-2012, 04:08 PM   #22
Stinger9
Registered User
 
Join Date: Sep 2011
Location: New York
Posts: 7,857
My Ride: '04 330Ci
Every mile of every day.


What the heck did I just say?
Stinger9 is offline   Reply With Quote
Old 09-30-2012, 04:12 PM   #23
Mc 007
Registered User
 
Join Date: Nov 2006
Location: Cittanova d'Istria-Croazia(Europa)
Posts: 2,227
My Ride: 325ci Performance
thank you very much,i can get my Eibach kit this week
__________________
Mc 007 is offline   Reply With Quote
Old 10-02-2012, 06:28 AM   #24
J LAU
Registered User
 
Join Date: Feb 2008
Location: SoCal / HK
Posts: 175
My Ride: 325i
HUGE DIFFERENT!

I have the Eibach Anti-Roll Kit for F+R
27mm in the front
21mm in the rear

I think they are more effective than springs, especially on high speed corners.

Last edited by J LAU; 10-02-2012 at 06:42 AM.
J LAU is offline   Reply With Quote
Old 10-02-2012, 12:43 PM   #25
Mc 007
Registered User
 
Join Date: Nov 2006
Location: Cittanova d'Istria-Croazia(Europa)
Posts: 2,227
My Ride: 325ci Performance
super,tomorrow i can test them on my car;-)
__________________
Mc 007 is offline   Reply With Quote
Old 10-03-2012, 04:37 AM   #26
Mc 007
Registered User
 
Join Date: Nov 2006
Location: Cittanova d'Istria-Croazia(Europa)
Posts: 2,227
My Ride: 325ci Performance
5 min ago
[IMG] Uploaded with ImageShack.us[/IMG]
__________________
Mc 007 is offline   Reply With Quote
Old 10-03-2012, 10:54 AM   #27
Stinger9
Registered User
 
Join Date: Sep 2011
Location: New York
Posts: 7,857
My Ride: '04 330Ci
Easy to show in the box.

Harder to show on the car!

Did you get new links to put on at the same time?

Last edited by Stinger9; 10-03-2012 at 10:55 AM.
Stinger9 is offline   Reply With Quote
Old 10-03-2012, 12:57 PM   #28
Mc 007
Registered User
 
Join Date: Nov 2006
Location: Cittanova d'Istria-Croazia(Europa)
Posts: 2,227
My Ride: 325ci Performance
installed this afternoon,another drive,but i have do only a fast turn,tomorrow maybe more km test
__________________
Mc 007 is offline   Reply With Quote
Old 10-06-2012, 12:31 AM   #29
peytonracer4
:D
 
peytonracer4's Avatar
 
Join Date: Jan 2010
Location: Valparaiso, IN
Posts: 6,512
My Ride: '00 328i
Quote:
Originally Posted by Mc 007 View Post
installed this afternoon,another drive,but i have do only a fast turn,tomorrow maybe more km test
excited to hear your feedback
__________________
choose to click or forever hold your peace ;)
peytonracer4 is offline   Reply With Quote
Old 10-07-2012, 01:29 PM   #30
Mc 007
Registered User
 
Join Date: Nov 2006
Location: Cittanova d'Istria-Croazia(Europa)
Posts: 2,227
My Ride: 325ci Performance
fantastic,yesterday i do a test of 60km,another drive...i must learn to drive my car
__________________
Mc 007 is offline   Reply With Quote
Old 10-08-2012, 06:55 AM   #31
subieworx
Registered User
 
Join Date: Nov 2011
Location: cincinnati
Posts: 72
My Ride: ZHP, 335, E53, E30
Quote:
Originally Posted by Stinger9 View Post
Chart for comparing Sway Bars


This chart is only relevant for solid sway bar sizing.

Last edited by subieworx; 10-08-2012 at 06:56 AM.
subieworx is offline   Reply With Quote
Old 10-08-2012, 08:41 AM   #32
Stinger9
Registered User
 
Join Date: Sep 2011
Location: New York
Posts: 7,857
My Ride: '04 330Ci
Quote:
Originally Posted by subieworx View Post
This chart is only relevant for solid sway bar sizing.
What kind do you have?
Stinger9 is offline   Reply With Quote
Old 10-08-2012, 08:02 PM   #33
subieworx
Registered User
 
Join Date: Nov 2011
Location: cincinnati
Posts: 72
My Ride: ZHP, 335, E53, E30
Stock.

A typical hollow bar has a .25" wall thickness and with lots of complicated math can be found to have a lower overall stiffness than a solid bar. Most 25mm bars have an equivalent stiffness to a solid 22mm.
subieworx is offline   Reply With Quote
Old 10-08-2012, 08:30 PM   #34
Stinger9
Registered User
 
Join Date: Sep 2011
Location: New York
Posts: 7,857
My Ride: '04 330Ci
True, they save steel and weight with a hollow bar because the torsional rigidity is derived mostly from the resistance to twisting of the steel at the outer part of the radius rather than the steel they 'remove' from the core.
How can you tell whether your bar is hollow or solid for sure?

Try a heavier bar sometime on your car. Very satisfying.

Why is the math more complicated than computing the rigidity for a solid bar and then subtracting the rigidity of a solid bar with the diameter of the hollow space within?
Stinger9 is offline   Reply With Quote
Old 10-08-2012, 08:40 PM   #35
subieworx
Registered User
 
Join Date: Nov 2011
Location: cincinnati
Posts: 72
My Ride: ZHP, 335, E53, E30
Think about that. If the bar was 25mm OD with .25" wall thickness that would mean that the inside diameter (hollow section) would be 12.3mm. That would leave an equivalent stiffness of 12.7mm i.e. the 25mm hollow bar is WAY less stiff that a stock 20mm bar. (all hypothetical bar sizes) The math is quite complicated.

My saying that a 25mm hollow is roughly equivalent to a 22mm solid is a gross oversimplification. The actual wheel rate of a bar is also influenced by the lever arm of the bar. A bar with a 12" lever arm is going to be much less stiff than a bar with a 1" lever arm as that arm (as measured from the center of the portion of the bar that spans the bushings) due to the mechanical advantage of the longer arm. Example: a 50mm bar with a 12" lever arm could actually have an equivalent stiffness that is less than a 10mm bar with a 1" lever arm. (just for reference and very likely not the case, but you get the point)
subieworx is offline   Reply With Quote
Old 10-08-2012, 09:11 PM   #36
Stinger9
Registered User
 
Join Date: Sep 2011
Location: New York
Posts: 7,857
My Ride: '04 330Ci
I did think about it. I don't think you understood my suggested methodology. Please re-read.

And

I normalized the length of the lever arm for comparative purposes. No need to factor them in.
Stinger9 is offline   Reply With Quote
Old 10-09-2012, 05:32 AM   #37
subieworx
Registered User
 
Join Date: Nov 2011
Location: cincinnati
Posts: 72
My Ride: ZHP, 335, E53, E30
Wasn't trying to be mean.

I understand what you said as I described in my example. The lever arm example was to help people further understand sway bars.
subieworx is offline   Reply With Quote
Old 10-12-2012, 07:02 PM   #38
ThatGuy_JZ
Registered User
 
Join Date: Jul 2008
Location: CLT, NC
Posts: 995
My Ride: '02 Steel Blue 325Ci
Send a message via AIM to ThatGuy_JZ
My Hotchkis bars made a HUGE difference. And with my coilovers now the chassis has little to no roll. The limiting factor now is solely just my tires
__________________
- 2002 Steel Blue 325Ci -

ThatGuy_JZ is offline   Reply With Quote
Old 10-13-2012, 09:59 AM   #39
dawnpatrol53
Banned User
 
Join Date: Jul 2012
Location: California
Posts: 61
My Ride: 2004 330ci
^x10,000
dawnpatrol53 is offline   Reply With Quote
Old 10-13-2012, 07:09 PM   #40
hokiebimmer
Registered User
 
Join Date: Jun 2011
Location: Chapel Hill, NC/ Virginia Tech
Posts: 123
My Ride: 2003 BMW 330i ZHP
Just put hotchkis bars on my car today as well. HUGE difference
__________________
2007 335i Coupe: current
2003 330i ZHP: (for sale)

hokiebimmer is offline   Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes Rate This Thread
Rate This Thread:

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 On
Censor is ON





All times are GMT -5. The time now is 11:26 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
(c) 1999 - 2011 performanceIX Inc - privacy policy - terms of use