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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Technical Forums > Suspension | Brakes | Chassis > Sway bar question



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      12-29-2015, 01:01 PM   #1
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Sway bar question

Hello everybody,

Which would be better for my 2007 e92 BMW 335i, a rear sway bar only, a front sway bar only, or a front and rear sway bar. I would like my car to Handle the best it can!

Thank you in advance.
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      12-29-2015, 05:29 PM   #2
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all depends where you are starting from:

If you are completely stock, something like this order would be recommended:

1. Improved dampers, like Koni or Bilstein (with an e92, assuming rwd, this would be Koni Yellow or Bilstein B8.)
2. If you want to drop it lower than stock sport, then BMW performance springs or H&R/Eibach springs or you start down the higher dollar path and go with coilovers. That is another world altogether and you will have to start researching. Popular options are Bilstein, Ohlins, KW.
3. Then M3 control arms for the front and remove the strut pin to max negative camber.
4. Then M3 arms and subframe bushings for the rear. Can also do Dinan or Monroe top rsb to remove some bounce.
5. Then front sway bar, an e93 M3 bar is recommended. This is the stiffest oem bar. There are also aftermarket bars.
6. Then a LSD for your differential.
7. Then a M3 rear sway bar.
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Last edited by cdgatti; 12-30-2015 at 10:35 AM.
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      12-29-2015, 10:10 PM   #3
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Quote:
Originally Posted by cdgatti View Post
all depends where you are starting from:

If you are completely stock, something like this order would be recommended:

1. Improved dampers, like Koni or Bilstein (with an e92, assuming rwd, this would be Koni Yellow or Bilstein B8.)
2. If you want to drop it lower than stock sport, then BMW performance springs or H&R springs or you start down the higher dollar path and go with coilovers. That is another world altogether and you will have to start researching.
3. Then M3 control arms for the front and remove the strut pin to max negative camber.
4. Then M3 arms and subframe bushings for the rear.
5. Then front sway bar, an e93 M3 bar is recommended.
6. Then a LSD for your differential.
7. Then a M3 rear sway bar.
Good step by step upgrade!
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      12-29-2015, 11:12 PM   #4
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Quote:
Originally Posted by cdgatti View Post
all depends where you are starting from:

If you are completely stock, something like this order would be recommended:

1. Improved dampers, like Koni or Bilstein (with an e92, assuming rwd, this would be Koni Yellow or Bilstein B8.)
2. If you want to drop it lower than stock sport, then BMW performance springs or H&R springs or you start down the higher dollar path and go with coilovers. That is another world altogether and you will have to start researching.
3. Then M3 control arms for the front and remove the strut pin to max negative camber.
4. Then M3 arms and subframe bushings for the rear.
5. Then front sway bar, an e93 M3 bar is recommended.
6. Then a LSD for your differential.
7. Then a M3 rear sway bar.
How much bigger the the m3 front sway e93? I believe the e92 m3 front sway is 26 right? completely solid vs. ours which thins out in the middle?
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      12-29-2015, 11:55 PM   #5
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Quote:
Originally Posted by hz_diesel View Post
How much bigger the the m3 front sway e93? I believe the e92 m3 front sway is 26 right? completely solid vs. ours which thins out in the middle?
The m3 e93 front sway bar is heavier and thicker compared to stock. Do a search, the exact amounts are well documented. I think a better choice is to go aftermarket for swaybars as you can get both front and rears for the price of just the m3 e93 front sway bar. I went with ECS Tuning's house branded sway bars.
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      12-29-2015, 11:58 PM   #6
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Quote:
Originally Posted by mpiascik View Post
Hello everybody,

Which would be better for my 2007 e92 BMW 335i, a rear sway bar only, a front sway bar only, or a front and rear sway bar. I would like my car to Handle the best it can!

Thank you in advance.
If you really want your car to handle the best it can then get an LSD. The M3 control arms and lowering the car will also improve handling. Sway bars are the last thing you should consider.

The list posted in this thread is excellent - consider going step by step down the list.

If you do only one upgrade, get an LSD. Expensive, but it will help put power to the ground.
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      12-30-2015, 12:12 AM   #7
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Quote:
Originally Posted by hz_diesel View Post
How much bigger the the m3 front sway e93? I believe the e92 m3 front sway is 26 right? completely solid vs. ours which thins out in the middle?
It is 28MM, about 30 percent stiffer than stock.
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      12-31-2015, 12:07 AM   #8
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Quote:
Originally Posted by cdgatti View Post
all depends where you are starting from:

If you are completely stock, something like this order would be recommended:

1. Improved dampers, like Koni or Bilstein (with an e92, assuming rwd, this would be Koni Yellow or Bilstein B8.)
2. If you want to drop it lower than stock sport, then BMW performance springs or H&R/Eibach springs or you start down the higher dollar path and go with coilovers. That is another world altogether and you will have to start researching. Popular options are Bilstein, Ohlins, KW.
3. Then M3 control arms for the front and remove the strut pin to max negative camber.
4. Then M3 arms and subframe bushings for the rear. Can also do Dinan or Monroe top rsb to remove some bounce.
5. Then front sway bar, an e93 M3 bar is recommended. This is the stiffest oem bar. There are also aftermarket bars.
6. Then a LSD for your differential.
7. Then a M3 rear sway bar.
Under #4, can you give me an example of the subframe bushing for the rear? Which upgrade part is this again?
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      12-31-2015, 12:18 PM   #9
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For #4 there are both aftermarket and oem BMW M3 subframe bushings.
here's a link to the m3 bushings.

http://www.turnermotorsport.com/p-12...KMBhoCrfjw_wcB
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      01-01-2016, 11:06 PM   #10
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Quote:
Originally Posted by bmwhitman View Post
Under #4, can you give me an example of the subframe bushing for the rear? Which upgrade part is this again?
Do a search of this subsection using the word "bushings". I did it about a year ago when I was doing research. There are LOTS of options.
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      01-02-2016, 06:59 AM   #11
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Quote:
Originally Posted by mpiascik View Post
Hello everybody,

Which would be better for my 2007 e92 BMW 335i, a rear sway bar only, a front sway bar only, or a front and rear sway bar. I would like my car to Handle the best it can!

Thank you in advance.

Wow! Where to begin? Let's say: Don't install stiff rear sway before adding LSD.

Being '07, have to assume worn suspension parts - that you have a candidate for many upgrades. [click here] and settle in....
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      01-02-2016, 08:22 PM   #12
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.

The relatively inexpensive way to a better life is:

BMW Sport Springs / Performance Springs **
Koni FSD Shocks
M3 Rear Subframe Bushings

** Sport Springs are part of the factory Sport suspension - if you got that you only need the shocks - FSD's are designed specifically for those springs

You'll like your no-longer-pothole-exploding ride and suddenly, your rear's not dislocated.

Now look into a LSD....
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      01-10-2016, 08:15 PM   #13
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Great step by step, but should also include Michelin PSS Non-run flats!
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      01-11-2016, 02:38 PM   #14
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Quote:
Originally Posted by CALWATERBOY View Post
.

The relatively inexpensive way to a better life is:

BMW Sport Springs / Performance Springs **
Koni FSD Shocks
M3 Rear Subframe Bushings

** Sport Springs are part of the factory Sport suspension - if you got that you only need the shocks - FSD's are designed specifically for those springs

You'll like your no-longer-pothole-exploding ride and suddenly, your rear's not dislocated.
I freaking hate when my car does that, especially on a mid corner bump
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Last edited by Jaronbwall; 01-11-2016 at 06:01 PM.
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      01-11-2016, 02:41 PM   #15
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Quote:
Originally Posted by mpiascik View Post
Hello everybody,

Which would be better for my 2007 e92 BMW 335i, a rear sway bar only, a front sway bar only, or a front and rear sway bar. I would like my car to Handle the best it can!

Thank you in advance.
Very, very, VERY off topic... but you don't happen to know a Ken Piascik that plays drums?
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      01-11-2016, 02:57 PM   #16
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Quote:
Originally Posted by tc535i
Quote:
Originally Posted by mpiascik View Post
Hello everybody,

Which would be better for my 2007 e92 BMW 335i, a rear sway bar only, a front sway bar only, or a front and rear sway bar. I would like my car to Handle the best it can!

Thank you in advance.
Very, very, VERY off topic... but you don't happen to know a Ken Piascik that plays drums?
Yes I do lol why
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      01-11-2016, 03:03 PM   #17
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Quote:
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Yes I do lol why
Same guy that I took lessons from about 20 years ago in the bay area??
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      01-11-2016, 07:52 PM   #18
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Quote:
Originally Posted by tc535i
Quote:
Originally Posted by mpiascik View Post
Yes I do lol why
Same guy that I took lessons from about 20 years ago in the bay area??
Probably!!
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      01-11-2016, 08:03 PM   #19
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Quote:
Originally Posted by mpiascik View Post
Probably!!
Does he still pronounce it "paycheck"? Lol

Small world. Damn.
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      01-11-2016, 08:04 PM   #20
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Quote:
Originally Posted by tc535i
Quote:
Originally Posted by mpiascik View Post
Probably!!
Does he still pronounce it "paycheck"? Lol

Small world. Damn.
"Pay-sick" and yeah super small world!
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      01-11-2016, 08:07 PM   #21
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Quote:
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"Pay-sick" and yeah super small world!
Yeah, it was a joke of his iirc. Took drum set lessons from him in a tiny room on the second sory of a music store. What's he up to these days??
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      01-11-2016, 08:09 PM   #22
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Quote:
Originally Posted by tc535i
Quote:
Originally Posted by mpiascik View Post
"Pay-sick" and yeah super small world!
Yeah, it was a joke of his iirc. Took drum set lessons from him in a tiny room on the second sory of a music store. What's he up to these days??
He's still teaching !
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