E90Post
 


Bimmer Retrofit
 
BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Technical Forums > All-Wheel-Drive (Xi / xDrive) Talk > M3 Swaybar Review



Reply
 
Thread Tools Search this Thread
      05-09-2011, 11:10 PM   #1
timber511
Private
 
Drives: BMW Z435IS
Join Date: Nov 2010
Location: Markham

Posts: 91
iTrader: (0)

M3 Swaybar Review

Installed uuc front swaybar couple month ago. bodyroll has been reduced
a lot. I went to the track last week. I do find the understeering problem.
did some research on the internet and decide to put the rear swaybar on it.
i pick M3 SWAYBAR becuase i can still keep the warranty on my car. order the parts from getbmwparts.com. it costs me total 225 canadian dollar including the shipping. installation cost me another 200 dollar since they have to lower the rear subfarme.

review

Bodyrolling almost gone
understeering has improved
handing ---day and night difference

even though it costs me $425 ,but it worth the money.
timber511 is offline  
0
Reply With Quote
      05-09-2011, 11:14 PM   #2
Tee212
Banned
 
Drives: yes
Join Date: Oct 2008
Location: Riverside

Posts: 4,545
iTrader: (9)

Garage List
2010 335  [4.00]
Send a message via AIM to Tee212 Send a message via MSN to Tee212
how much was labor?
Tee212 is offline   United_States
0
Reply With Quote
      05-10-2011, 02:19 AM   #3
henry418
Captain
 
henry418's Avatar
 
Drives: 2011 335xi Coupe
Join Date: Jan 2011
Location: Vancouver, Canada

Posts: 739
iTrader: (4)

I'd get this mod if labor was cheaper ... (dropping subframe) can't really justify for that labor price.
henry418 is offline  
0
Reply With Quote
      05-10-2011, 07:01 AM   #4
pits200
Lieutenant Colonel
 
Drives: 09 335i X-Drive Black Sapphire
Join Date: Mar 2010
Location: Pittsburgh

Posts: 1,897
iTrader: (0)

What other suspension mods do you have? And do you notice if the ride is much harsher?
pits200 is offline   United_States
0
Reply With Quote
      05-10-2011, 07:38 AM   #5
shonuff
Second Lieutenant
 
shonuff's Avatar
 
Drives: E92 335xi
Join Date: Jul 2010
Location: Thornhill

Posts: 223
iTrader: (7)

Garage List
2008 BMW 335xi  [5.00]
Just to confirm: did you remove the UUC front swaybar? I remember reading a post by Doyle saying the UUC front swaybar was too stiff and actually caused more understeer (when compared to the rear swaybar alone).

P.S Also in Toronto and interested where you got the install done.
__________________
e92 335xi Black Sapphire Metallic - Saddle Brown
| JB4 | WW Meth | BMS DCI | Eisenmann Race Quad | AR Catless DPs | KW v1 | LUX v3 | Aero Lip | Painted Reflectors | Matte Black Grill | OEM 230s | CF CSL Trunk |
shonuff is offline   Canada
0
Reply With Quote
      05-10-2011, 11:02 AM   #6
Lenaxia
Lieutenant
 
Drives: 2006 330xi 6MT
Join Date: Aug 2009
Location: Santa Clara, CA

Posts: 564
iTrader: (4)

Garage List
2006 330xi  [0.00]
Theoretically, adding only the rear swaybar produces an almost perfectly balanced car. The UUC rear sway will be closer to neutral and the M3 rear sway will have a little bit of oversteer. Adding anything other than the stock front sway will again revert to a understeer bias in our XI's.

If you want a car with 0 understeer and 0 oversteer, you should either go all stock + UUC rear sway, or M3 rear sway with spacers/staggered in back.

I will be upgrading both my suspension and rear sway at the same time sometime this year, I will be doing M3 rear sway with spacers.
__________________
Lenaxia is offline   United_States
0
Reply With Quote
      05-10-2011, 11:58 AM   #7
timber511
Private
 
Drives: BMW Z435IS
Join Date: Nov 2010
Location: Markham

Posts: 91
iTrader: (0)

Quote:
Originally Posted by shonuff View Post
Just to confirm: did you remove the UUC front swaybar? I remember reading a post by Doyle saying the UUC front swaybar was too stiff and actually caused more understeer (when compared to the rear swaybar alone).

P.S Also in Toronto and interested where you got the install done.
i still keep the front swaybar on the car
timber511 is offline  
0
Reply With Quote
      05-10-2011, 12:20 PM   #8
timber511
Private
 
Drives: BMW Z435IS
Join Date: Nov 2010
Location: Markham

Posts: 91
iTrader: (0)

Quote:
Originally Posted by henry418 View Post
I'd get this mod if labor was cheaper ... (dropping subframe) can't really justify for that labor price.


labour cost me $200
timber511 is offline  
0
Reply With Quote
      05-10-2011, 12:21 PM   #9
timber511
Private
 
Drives: BMW Z435IS
Join Date: Nov 2010
Location: Markham

Posts: 91
iTrader: (0)

Quote:
Originally Posted by pits200 View Post
What other suspension mods do you have? And do you notice if the ride is much harsher?

I have HR COILOVER ON MY CAR
timber511 is offline  
0
Reply With Quote
      05-10-2011, 06:20 PM   #10
shonuff
Second Lieutenant
 
shonuff's Avatar
 
Drives: E92 335xi
Join Date: Jul 2010
Location: Thornhill

Posts: 223
iTrader: (7)

Garage List
2008 BMW 335xi  [5.00]
Quote:
Originally Posted by Lenaxia View Post
Theoretically, adding only the rear swaybar produces an almost perfectly balanced car. The UUC rear sway will be closer to neutral and the M3 rear sway will have a little bit of oversteer. Adding anything other than the stock front sway will again revert to a understeer bias in our XI's.

If you want a car with 0 understeer and 0 oversteer, you should either go all stock + UUC rear sway, or M3 rear sway with spacers/staggered in back.

I will be upgrading both my suspension and rear sway at the same time sometime this year, I will be doing M3 rear sway with spacers.
Nice, I plan on doing the same sometime soon. The e92 xi comes with 18's staggered stock so wouldnt that mean changing to a square setup if remaining stock with the UUC rear sway? I plan to go stock staggered 18s with M3 rear sway.
__________________
e92 335xi Black Sapphire Metallic - Saddle Brown
| JB4 | WW Meth | BMS DCI | Eisenmann Race Quad | AR Catless DPs | KW v1 | LUX v3 | Aero Lip | Painted Reflectors | Matte Black Grill | OEM 230s | CF CSL Trunk |
shonuff is offline   Canada
0
Reply With Quote
      05-11-2011, 12:07 AM   #11
Lenaxia
Lieutenant
 
Drives: 2006 330xi 6MT
Join Date: Aug 2009
Location: Santa Clara, CA

Posts: 564
iTrader: (4)

Garage List
2006 330xi  [0.00]
Quote:
Originally Posted by shonuff View Post
Quote:
Originally Posted by Lenaxia View Post
Theoretically, adding only the rear swaybar produces an almost perfectly balanced car. The UUC rear sway will be closer to neutral and the M3 rear sway will have a little bit of oversteer. Adding anything other than the stock front sway will again revert to a understeer bias in our XI's.

If you want a car with 0 understeer and 0 oversteer, you should either go all stock UUC rear sway, or M3 rear sway with spacers/staggered in back.

I will be upgrading both my suspension and rear sway at the same time sometime this year, I will be doing M3 rear sway with spacers.
Nice, I plan on doing the same sometime soon. The e92 xi comes with 18's staggered stock so wouldnt that mean changing to a square setup if remaining stock with the UUC rear sway? I plan to go stock staggered 18s with M3 rear sway.
No. UUC Rear sway with staggered will be fine. It will just have a slight bit of understeer which is probably a good idea. You prob won't even feel it unless you're tracking your car.

I'd take the money you'd otherwise spend on new wheels and put into the bilstein/swift suspension solution that's coming out for us soon. Were going for performance first here, looks second
__________________
Lenaxia is offline   United_States
0
Reply With Quote
      05-11-2011, 08:08 AM   #12
kdiggz
Captain
 
kdiggz's Avatar
 
Drives: e92 ///M3
Join Date: Jan 2010
Location: Buffalo, NY

Posts: 607
iTrader: (9)

Quote:
Originally Posted by Lenaxia View Post
put into the bilstein/swift suspension solution that's coming out for us soon
anymore info on this? i haven't heard of this myself
kdiggz is offline   No_Country
0
Reply With Quote
      05-11-2011, 11:35 AM   #13
Lenaxia
Lieutenant
 
Drives: 2006 330xi 6MT
Join Date: Aug 2009
Location: Santa Clara, CA

Posts: 564
iTrader: (4)

Garage List
2006 330xi  [0.00]
Posted some info here:

http://www.e90post.com/forums/showpo...52&postcount=3
__________________
Lenaxia is offline   United_States
0
Reply With Quote
      05-11-2011, 11:55 AM   #14
yakev724
Brigadier General
 
yakev724's Avatar
 
Drives: 00 RX300
Join Date: Jul 2010
Location: Ithaca, NY

Posts: 3,559
iTrader: (49)

A DIY for rear subframe bushings and rear sway would be nice. As I understand it, a special tool is required for the bushings, but might as well do both at once if going through with the work already...
yakev724 is offline   Russian Federation
0
Reply With Quote
      05-11-2011, 12:17 PM   #15
Lenaxia
Lieutenant
 
Drives: 2006 330xi 6MT
Join Date: Aug 2009
Location: Santa Clara, CA

Posts: 564
iTrader: (4)

Garage List
2006 330xi  [0.00]
As much as I'm a DIY kinda guy, I think my limit is doing my suspension my self. I'm going to have someone else do the rear subframe. I'm hearing it taking up to 4+ hours even for people who actually know what they're doing not because its difficult but because its just a plain pain in the ass.

Not too keen on something like that. Difficult is one thing, pain in the ass is... well... a pain in the ass.
__________________
Lenaxia is offline   United_States
0
Reply With Quote
      05-12-2011, 06:15 AM   #16
kdiggz
Captain
 
kdiggz's Avatar
 
Drives: e92 ///M3
Join Date: Jan 2010
Location: Buffalo, NY

Posts: 607
iTrader: (9)

Quote:
Originally Posted by Lenaxia View Post
oh, so it's just springs. i thought it was like a whole new complete suspension setup that was coming. fyi, dinan springs are linear as well
kdiggz is offline   No_Country
0
Reply With Quote
      05-12-2011, 09:04 AM   #17
MeeTsenPu
Second Lieutenant
 
Drives: 09 335i X-Drive
Join Date: Sep 2009
Location: PA

Posts: 270
iTrader: (3)

Quote:
Originally Posted by Lenaxia View Post
Theoretically, adding only the rear swaybar produces an almost perfectly balanced car. The UUC rear sway will be closer to neutral and the M3 rear sway will have a little bit of oversteer. Adding anything other than the stock front sway will again revert to a understeer bias in our XI's.

If you want a car with 0 understeer and 0 oversteer, you should either go all stock + UUC rear sway, or M3 rear sway with spacers/staggered in back.

I will be upgrading both my suspension and rear sway at the same time sometime this year, I will be doing M3 rear sway with spacers.
Are you assuming M3 rear bushings as well with the M3 rear sway bar and stock bushings with UUC rear sway?
MeeTsenPu is offline   United_States
0
Reply With Quote
      05-12-2011, 11:55 AM   #18
Lenaxia
Lieutenant
 
Drives: 2006 330xi 6MT
Join Date: Aug 2009
Location: Santa Clara, CA

Posts: 564
iTrader: (4)

Garage List
2006 330xi  [0.00]
Quote:
Originally Posted by MeeTsenPu View Post
Are you assuming M3 rear bushings as well with the M3 rear sway bar and stock bushings with UUC rear sway?
Actually I'm assuming stock bushings for both because I haven't been able to find deflection numbers for the M3 rear bushings. Then again I haven't looked all that hard yet.

kdiggz Yeah, a complete suspension would be awesome, but its probably not going to happen, at least at a price point reasonable for a non-tracked DD. The Bilstein B8 Sprints + Swift Springs should run about 1k total for all parts, much more reasonable than anything else offered. We'll have to wait and see what spring rates Swift puts on the e9x springs, after that I'll call Bilstein to see if revalves of their shocks are needed.

Also, duly noted that dinan are also linear but they also cost an arm and a leg, not to mention they only swap out the rear struts. Dinan is only worth it if you want the badge or have too much money to blow.

Eibach, H&R and KW's are all progressive springs which are actually detrimental to getting power to the ground for XI's as we lose traction in front.
__________________
Lenaxia is offline   United_States
0
Reply With Quote
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 02:51 AM.




e90post
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