BMW M3 Forum (E90 E92)

BMW Garage BMW Meets Register Search Today's Posts Mark Forums Read


Go Back   M3Post - BMW M3 Forum > E90/E92 M3 Technical Topics > Suspension | Brakes | Chassis
 
E92 Lighting
Post Reply
 
Thread Tools Search this Thread
      01-11-2013, 07:40 PM   #1
uplusd
Lieutenant
 
uplusd's Avatar
 
Drives: 2013 E92 M3
Join Date: Nov 2011
Location: NorCal

Posts: 458
iTrader: (7)

Corner weight balancing

Quick, and possibly silly, question about CWB. I'm wondering if which wheels you have effects the balance? Like for example if I corner weight balance my car with one set of wheels, and then put on another set, does it throw off the balance?
__________________
uplusd is offline   United_States
0
Reply With Quote
      01-11-2013, 07:51 PM   #2
bigjae1976
That's what she said...
 
bigjae1976's Avatar
 
Drives: 11 E90 M3 Individual
Join Date: Mar 2006
Location: Milwaukee, WI

Posts: 5,471
iTrader: (12)

Garage List
2004 BMW M3  [4.50]
2011 BMW E90 M3  [5.00]
2013 BMW 328i  [5.00]
I would say no. Maybe if you have staggered wheels that are significantly different in weight for a weird reason. Even then I think the difference will be negligble.
__________________


Sponsored by Momentum BMW #593...We Bleed BMW BLUE!
bigjae1976 is offline  
0
Reply With Quote
      01-11-2013, 07:54 PM   #3
Snertz
H O O N
 
Snertz's Avatar
 
Drives: ein M?!
Join Date: Oct 2008
Location: NY

Posts: 571
iTrader: (9)

Send a message via AIM to Snertz Send a message via Skype™ to Snertz
Since CWB takes into account the wheel weight, I think it does though to a very minimal effect since changing wheels results in perhaps <10lb total change per corner.
Snertz is offline   United_States
0
Reply With Quote
      01-11-2013, 08:00 PM   #4
bigjae1976
That's what she said...
 
bigjae1976's Avatar
 
Drives: 11 E90 M3 Individual
Join Date: Mar 2006
Location: Milwaukee, WI

Posts: 5,471
iTrader: (12)

Garage List
2004 BMW M3  [4.50]
2011 BMW E90 M3  [5.00]
2013 BMW 328i  [5.00]
The key is the cross weights and the proportional weight at each corner. So if you put wheels that are all 2lbs heavier at all 4 corners, it has no effect on those numbers.
__________________


Sponsored by Momentum BMW #593...We Bleed BMW BLUE!
bigjae1976 is offline  
0
Reply With Quote
      01-11-2013, 10:04 PM   #5
Raucky2000
Lieutenant
 
Raucky2000's Avatar
 
Drives: SGM E90 M3 dct
Join Date: Nov 2012
Location: Ohio

Posts: 483
iTrader: (3)

Not a big enough difference for you to notice IMHO, one set to another.
Raucky2000 is offline  
0
Reply With Quote
      01-17-2013, 11:47 AM   #6
Techevo
Evo Junkie
 
Drives: E91 325D M-Sport, Evo 6
Join Date: Dec 2009
Location: Bedford, UK

Posts: 119
iTrader: (0)

No, changing wheels makes no difference to corner weighting adjustments.

Corner weighting is done to adjust suspension lengths so that they give an even cross corner footprint. Think of it as adjusting a tables leg lengths so that the table doesn't wobble due to one or two legs being too short.

In adjusting the lengths, you are trying to obtain equal cross corner weights (as said by bigjae) so the front left and rear right weights added together equal the front right and rear left.

The only way to change weight distribution is by physically moving weight around, and cannot be done by corner weighting.
Techevo is offline  
0
Reply With Quote
      02-24-2013, 11:03 AM   #7
ortho281
Captain
 
ortho281's Avatar
 
Drives: 2011 E92 M3 6MT
Join Date: Aug 2010
Location: Katy, TX

Posts: 648
iTrader: (0)

Quote:
Originally Posted by Techevo View Post
No, changing wheels makes no difference to corner weighting adjustments.

Corner weighting is done to adjust suspension lengths so that they give an even cross corner footprint. Think of it as adjusting a tables leg lengths so that the table doesn't wobble due to one or two legs being too short.

In adjusting the lengths, you are trying to obtain equal cross corner weights (as said by bigjae) so the front left and rear right weights added together equal the front right and rear left.

The only way to change weight distribution is by physically moving weight around, and cannot be done by corner weighting.
^This. I used my street wheels/tires to do my corner-balancing because they were relatively new and the track tires were un-evenly worn!
Attached Images
 
__________________

Akra Evo / MS stage 2 / MS UDP / VF Tune / KW Clubsports Coilovers / Vorshlag plates / TMS Delrin Subframe and Diff Bushings / ST 380/355 BBK / ST SR34 pads / Apex Arc-8 / Nitto NT01 / Cantrell Motorsports roll cage / Recaro Profi / Schroth Profi II-6 / BMW Performance Alcantera wheel / Aim Solo DL
ortho281 is offline   United_States
0
Reply With Quote
      02-24-2013, 12:25 PM   #8
Superfly_M3
Captain
 
Drives: 2011 M3
Join Date: Sep 2011
Location: Toronto

Posts: 964
iTrader: (0)

Does CWB have that of a drastic effect on the way the car handles?
Superfly_M3 is offline  
0
Reply With Quote
      02-24-2013, 10:45 PM   #9
bigjae1976
That's what she said...
 
bigjae1976's Avatar
 
Drives: 11 E90 M3 Individual
Join Date: Mar 2006
Location: Milwaukee, WI

Posts: 5,471
iTrader: (12)

Garage List
2004 BMW M3  [4.50]
2011 BMW E90 M3  [5.00]
2013 BMW 328i  [5.00]
Depends how far off it is. If your close is pretty close to stock is should already be close. If you've got the full interior...unnecessary. Since you did put on TCKlines...as long as your car has a similar height ratio from side to side and front to back as the stock suspension...it should be close optimal.

IMO, corner balancing is only necessary when you've added a lot of weight or took some off. Otherwise its a very fine tuning detail step.

I have removed about 300 lbs from my track car...so I will corner balance it.
__________________


Sponsored by Momentum BMW #593...We Bleed BMW BLUE!
bigjae1976 is offline  
0
Reply With Quote
Post Reply

Bookmarks

Thread Tools Search this Thread
Search this Thread:

Advanced Search

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


All times are GMT -5. The time now is 01:17 PM.




m3post
Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
1Addicts.com, BIMMERPOST.com, E90Post.com, F30Post.com, M3Post.com, ZPost.com, 5Post.com, 6Post.com, 7Post.com, XBimmers.com logo and trademark are properties of BIMMERPOST