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 Rate Thread Display Modes
Old 10-01-2012, 09:03 PM   #1
jako1
Registered User
 
Join Date: Nov 2006
Location: vancouver
Posts: 56
My Ride: m3
Max'd out on Alignment Settings!

What conditions occur to make it so you cannot make anymore adjustments to Alignment settings? My passenger side right rear is red at -1.1 and cannot be adjusted anymore. If the Left rear is green at -1.7 that would mean the RR is about .5 degree off. What suspension piece is responsible for Camber? Would that need to be replaced in order to get adjustment abilities back?

The front right seems to be having issues as well. Both Caster and Camber is yellow 2/10 a degree on both. What suspension pieces are responsible for Camber and Caster?

Newer FCAB and RTABS. New shocks, struts, tires, OEM rims refinished alignements and road force balance performed.

I am trying to eliminate the last bit of vibration. Help if you can, driving me nuts when I hit 65 miles per hour and starts to vib.
Attached Thumbnails
Click image for larger version

Name:	BMW Align September 20122 Spec.jpg
Views:	58
Size:	104.2 KB
ID:	472057  

Last edited by jako1; 10-01-2012 at 09:05 PM.
jako1 is offline   Reply With Quote
Ads by Google

Guests, get your FREE E46Fanatics.com membership to remove this ad.
Old 10-02-2012, 09:42 AM   #2
Phillip@BMPDesign
Sponsor
 
Join Date: Sep 2012
Location: Tyler, TX
Posts: 27
My Ride: 2008 335i
Alignment won't cause your vehicle to vibrate. If you are starting to get vibrations at high speeds I would suspect either a tire imbalance or a bent wheel is the culprit. I typically get my tires balanced every 3-5k miles depending on the severity of the vibrations and it will usually clear that right up. If you can feel the vibrations in your steering wheel that would be your front wheels, if they are coming from your seat its the rears.

Vibration issues could also be caused by worn control arm or stabilizer arm bushings and worn hub bearings. If it was bushings or bearing though, you would likely feel it at lower speeds as well.

As far as alignment, Toe and Camber are adjustable with tie rods and control arms respectively. Caster is typically not going to be adjustable.

Also, there is a lot of confusion about a "roadforce balance". There is a roadforce test, which can help with "match mounting" the imperfections of the tire with the imperfections of the wheel to reduce corrective weight and help eliminate balance issues inherently since it applies a force to the tire assembly and reads the amount of force pushed back against the rolling pressure. If there is a section of tire that is harder or denser and there for springier than the rest of the tire, that can be measured. If it is severe enough, then the tire can usually be replaced with the manufacturer as defective if it is new. That requires new tires (since worn tires cannot be accurately tested, they can be tested, just not accurately for roadforce) to be mounted, inflated properly, tested, deflated and rotated on the rim for matching, then retested. Balancing is the last step, and isn't actually part of the roadforce process, its a regular spin balance. Any good computer spin balance should get your wheel assembly rolling smooth, unless you have unevenly worn tires, bent wheels, or an inconsistent tread build which seems to happen primarily with less expensive tires, but could happen to any tire.
__________________
Phillip Wilmeth
BMP Design
www.bmpdesign.com 1-800-648-7278
Like us on facebook!

Last edited by Phillip@BMPDesign; 10-02-2012 at 09:52 AM. Reason: To include roadforce notes
Phillip@BMPDesign is offline   Reply With Quote
Old 10-02-2012, 10:22 AM   #3
jako1
Registered User
 
Join Date: Nov 2006
Location: vancouver
Posts: 56
My Ride: m3
Thanks Phillip. The put new Michelin super on my refinished rims. At this point I can only suspect the refinishing wasn't done right. They sure do look good though. I guess the only thing left is to see if anyone can let me borrow their front wheels for me to test out.
jako1 is offline   Reply With Quote
Old 10-02-2012, 10:55 AM   #4
Phillip@BMPDesign
Sponsor
 
Join Date: Sep 2012
Location: Tyler, TX
Posts: 27
My Ride: 2008 335i
There are a lot of bent bmw wheels out there, and depending on how it was refinished or where the damage may have been at could still cause some problems at high speeds. If you haven't had it rebalanced at a reputable shop (or just a different shop from where the tires were installed) you may want to have that looked at. There are also different types of balance. A lot of shops with newer equipment are using a "smart balance" that determines the minimum amount of weight to correct a balance issue, it's not perfectly balanced but usually good enough and it saves the shop on lead weight costs. Then there is a zero balance that will call for more weight, sometimes in a counterbalance configuration, but will give a better dynamic balance (correcting up and down imbalance as well as side to side).

Also, you may want to watch the wheels spin on the balancer, to see if they are out of balance and also to see if there is any movement on the inner edge of the wheel that would indicate an out of round wheel.
__________________
Phillip Wilmeth
BMP Design
www.bmpdesign.com 1-800-648-7278
Like us on facebook!

Last edited by Phillip@BMPDesign; 10-02-2012 at 10:57 AM.
Phillip@BMPDesign is offline   Reply With Quote
Old 10-02-2012, 11:04 AM   #5
TrippinBimmer
Registered User
 
Join Date: Jan 2008
Location: Ridgeland, MS
Posts: 5,385
My Ride: ZHP Custom Stage 3.5
Send a message via AIM to TrippinBimmer Send a message via Yahoo to TrippinBimmer
If running stock suspension. I would say your top hat and rear lower control is tweaked...

Last edited by TrippinBimmer; 10-02-2012 at 11:07 AM.
TrippinBimmer 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 04:13 PM.


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