BMW 1 Series Coupe Forum / 1 Series Convertible Forum (1M / tii / 135i / 128i / Coupe / Cabrio / Hatchback) (BMW E82 E88 128i 130i 135i)
 





 

Post Reply
 
Thread Tools Search this Thread
      12-01-2014, 10:06 AM   #1
Aqua
Private
Taiwan
3
Rep
69
Posts

Drives: 1M
Join Date: Dec 2011
Location: TPE

iTrader: (0)

Rigid Collar for 1M

Anyone tried this on their 1M? Wonder how are the results.

It is made my Spoon

https://www.flickr.com/photos/rla044...7633273470912/

Appreciate 0
      12-01-2014, 11:50 AM   #2
Artemis
Brigadier General
Artemis's Avatar
Belgium
108
Rep
3,402
Posts

Drives: 1M (VO)
Join Date: Jun 2011
Location: Belgium

iTrader: (0)

Apparently somebody already did:

https://www.flickr.com/photos/rla044...7633273470912/
__________________
“For ’tis the mind that makes the body rich” (W. Shakespeare, The Taming of the Shrew, Act 4, Scene 3)
Appreciate 0
      12-01-2014, 11:57 AM   #3
MDORPHN
Colonel
44
Rep
2,581
Posts

Drives: AW 1M
Join Date: Oct 2010
Location: Wash, DC

iTrader: (0)

Might make sense for a track car, but too much NVH for the street.

Neil
Appreciate 0
      12-01-2014, 01:53 PM   #4
EldRick
Private First Class
United_States
4
Rep
126
Posts

Drives: 1M VO - #161 US
Join Date: Sep 2014
Location: Portland - the Real one - in Oregon

iTrader: (0)

Quote:
... too much NVH for the street.
Actually, it might well reduce NVH, by better coupling the subframe and other potentially-moving bits to the greater mass of the frame, rather than allowing them to resonate and vibrate.
Appreciate 0
      12-01-2014, 03:20 PM   #5
flzrider
Captain
9
Rep
669
Posts

Drives: AW 1M
Join Date: Oct 2005
Location: Miami, FL

iTrader: (1)

Interesting. I would like to hear someone's experience with these to gauge how much benefit it provides.
__________________
Appreciate 0
      12-01-2014, 03:23 PM   #6
MDORPHN
Colonel
44
Rep
2,581
Posts

Drives: AW 1M
Join Date: Oct 2010
Location: Wash, DC

iTrader: (0)

Quote:
Originally Posted by EldRick View Post
Actually, it might well reduce NVH, by better coupling the subframe and other potentially-moving bits to the greater mass of the frame, rather than allowing them to resonate and vibrate.
Have you ever driven a car with solid mounts?

They substantially increase NVH.

Neil
Appreciate 0
      12-01-2014, 04:07 PM   #7
EldRick
Private First Class
United_States
4
Rep
126
Posts

Drives: 1M VO - #161 US
Join Date: Sep 2014
Location: Portland - the Real one - in Oregon

iTrader: (0)

Totally different issue. Solid motor/tranny/suspension mounts replace rubber bushings with hard material. This simply makes an already solid attachment-point better.
(Maybe.)
AFAIC, the jury is out on this one - a lot of positive reviews, but there are a lot of positive reviews for the $60 Turbo Intake Fan, too...
Appreciate 1
      12-01-2014, 07:15 PM   #8
eeghie
Kind of a Big Deal
19
Rep
1,258
Posts

Drives: an 1M not often enough
Join Date: Jan 2011
Location: between Unlimited and Hard to Get

iTrader: (0)

solid connection is replaced with marginally softer but still non compliant material, so i'm skeptical on this product doing anything more than what a regular torquing or alignment would do, assuming something was misaligned or loose to begin with.
Appreciate 0
      12-01-2014, 07:49 PM   #9
ilikebmxbikes
Brigadier General
ilikebmxbikes's Avatar
65
Rep
3,147
Posts

Drives: S65 1M Clone & E92 M3 4.6L
Join Date: Apr 2011
Location: San Francisco

iTrader: (36)

Garage List
Quote:
Originally Posted by MDORPHN View Post
Have you ever driven a car with solid mounts?

They substantially increase NVH.

Neil
Solid mounted subframe does not induce much NVH. The m3 gts, f10 m5 and f8x are solid mounted. Solid diff, motor and tranny bushings do however.
Appreciate 0
      12-01-2014, 10:13 PM   #10
Em/1
First Lieutenant
Em/1's Avatar
United_States
3
Rep
367
Posts

Drives: 2011 1M VO
Join Date: Dec 2011
Location: Chicago

iTrader: (0)

Garage List
2004 Jaguar XJ8  [0.00]
2011 BMW 1M  [0.00]
2011 VW GTI  [0.00]
Too me this appears not to be a change to solid mounts, but rather substituting a more sturdy solid mount for a less sturdy/sloppy one. At no point in the film, at least, did they show a rubber mount being tossed. Looks like it would have no downside other than time and money; hard to know how much upside!
Appreciate 0
      12-01-2014, 10:43 PM   #11
PeteA
Captain
PeteA's Avatar
Australia
15
Rep
810
Posts

Drives: 135i
Join Date: Sep 2012
Location: Melbourne

iTrader: (3)

For the rear subframe? That would be fine for NVH. Is there a kit available?
Appreciate 0
      12-01-2014, 11:51 PM   #12
TXmtrhed
First Lieutenant
TXmtrhed's Avatar
3
Rep
331
Posts

Drives: VO 1M
Join Date: Aug 2010
Location: Katy, TX

iTrader: (0)

To me the point of the collars is two fold:
1) to make sure the subframe is centered up under the mounting bosses and 2) to make sure the subframe does not shift leading to suspension alignment changes.

Neither one is a big concern since I don't know of any cases of movement with the subframe properly torqued in place. The examples shown don't show any movement, only slight misalignment which would be dialed out by a proper alignment job. And the rubber bushings will compress laterally no matter how sturdily the subframe is located.

In my mind the key advantage of the solid SFB is the decrease in vertical compliance which affects the effective spring rate especially with stiffer springs. The collars won't have any effect on this.
__________________
Appreciate 0
      12-02-2014, 03:39 AM   #13
PeteA
Captain
PeteA's Avatar
Australia
15
Rep
810
Posts

Drives: 135i
Join Date: Sep 2012
Location: Melbourne

iTrader: (3)

Well, here is my two cents. Other than lining things up right the first time things are bolted up, to my logic there are negatives. For eg:

You're adding a some thickness between each bolt head the mounting point. By doing so, you would effectively be losing a thread or two in bolt depth into the hole.

Given that the bolt is now sitting a few threads further out, you would need to over-toque all the bolts where a collar is placed to make up for it.

You're adding a material that is soft enough to 'fill in' the gaps from just torquing , I am sure they would elongate from driving about under load.

Like the others said, torque all your shit properly and dial out the variations with an alignment. The flex in the rubber bushings are better tackled instead. I recommend solid subframe bushings, adjustable rear toe arms (rogue/dinan) and some nice dinan monoball front control arm bushings.
Appreciate 0
      12-02-2014, 10:28 AM   #14
Snertz
H O O N
Snertz's Avatar
United_States
13
Rep
588
Posts

Drives: ein M?!
Join Date: Oct 2008
Location: NY

iTrader: (9)

Send a message via AIM to Snertz Send a message via Skype™ to Snertz
IMO dialing out the variations with an alignment is just a band-aid that doesn't address how alignment changes as the suspension compresses; Static wheel alignment square to the body but with a subframe that isn't square would result in a wheel motion that isn't the same on both sides.

I think there is some merit to the mod, though not as much as Spoon makes it out to be.

http://www.rigidcollar.com/bmw-bmw-1...e88-front.html
http://www.rigidcollar.com/bmw-bmw-1...-e88-rear.html

Cheaper option here : http://bit.ly/1tIkYPn anyone wanna be a guinea pig?
__________________

U WOT M8?

Last edited by Snertz; 12-02-2014 at 10:55 AM.
Appreciate 0
      12-02-2014, 01:11 PM   #15
eeghie
Kind of a Big Deal
19
Rep
1,258
Posts

Drives: an 1M not often enough
Join Date: Jan 2011
Location: between Unlimited and Hard to Get

iTrader: (0)

Quote:
Originally Posted by Snertz View Post
IMO dialing out the variations with an alignment is just a band-aid that doesn't address how alignment changes as the suspension compresses; Static wheel alignment square to the body but with a subframe that isn't square would result in a wheel motion that isn't the same on both sides.

...

Cheaper option here : http://bit.ly/1tIkYPn anyone wanna be a guinea pig?
Fair point but does not necessarily mean that factory misalignment produces noticeable handling deterioration; Or the other way around: 150 SGP$ (~114$) seems a reasonable price to test for yourself if perfect sub frame alignment produces any noticeable handling improvements: who's first? @Advevo?

And if factory misalignment could be noticeable, wouldn't car manufacturers want to fit these collars on press cars?
Appreciate 0
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 07:41 AM.




1addicts
Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2015, 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