E90Post
 


MINHS Auto Care Center
 
BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Technical Forums > Suspension | Brakes | Chassis > E90 Aftermarket Suspension Guide (aftermarket options list)



Reply
 
Thread Tools Search this Thread
      07-08-2013, 03:08 AM   #155
ashmostro
Lieutenant Colonel
ashmostro's Avatar
United_States
20
Rep
1,760
Posts

 
Drives: '13 335is DCT
Join Date: Jan 2013
Location: Vienna, VA

iTrader: (9)

As do I- was mere curiosity only, seeing as I have ASTs on the way.

Thanks regardless.
Appreciate 0
      07-14-2013, 06:55 PM   #156
Alpha_Onion
Modaholic/Torque-Junkie
Alpha_Onion's Avatar
United_States
2
Rep
96
Posts

 
Drives: 2007 E90 335i (silver)
Join Date: Feb 2013
Location: Houston, TX

iTrader: (0)

Anybody have an answer to my question?
__________________
2007 E90 335i Titanium Silver Metallic, Premium Package, Comfort Access Package
JB4 Borla catback & midpipes VRSF DP's AFE DCI w/ scoops 19" wheels ST V1 M3 control arms UR strut brace HID projector fogs LED Blacklines full LED conversion
Appreciate 0
      07-16-2013, 03:09 PM   #157
Sparkee
Stability is Overrated
Sparkee's Avatar
0
Rep
45
Posts

 
Drives: '08 E90 328i Sedan
Join Date: Nov 2011
Location: MD

iTrader: (0)

Quote:
Originally Posted by Alpha_Onion View Post
Anybody have an answer to my question?
I'll give you what I believe to be the tuner's answer. If you have understeer, you want to make the front suspension relatively more compliant than the rear so you get more front end grip. One way to do this is to install new sway bars with a a bigger ratio of stiffness in the rear bar to that of the front. Another way is stiffer springs on the rear and/or softer in the front. And you can play with air pressures in your tires.

And, obviously the opposite would be true for oversteer.

Also note that if the rear sway bar is (or rear springs are) too stiff, you can induce more tire spin coming off corners because the rear is not compliant enough, at least with non-LSD RWD cars (like mine). I was a bit worried about that with the H&R sway bar.

So, I don't think there is really any absolute answer to your question. It depends on what you are trying to achieve. If you don't really want to change the handling performance of your car other than to eliminate body roll, then a balanced upgrade might be the best.

One of the reasons I went with a whole system was to ensure that I had a matched set up that had been tuned by the suspension engineers. One would hope they did this through a bit of a trial and error process playing with different front and rear sway bar spring rates to see what worked best on the vehicle. I don't know if Eibach did that, but the sport system plus kit seems to be really good in my car - except the car is still is a little bit tight on the track.
Appreciate 0
      07-18-2013, 05:27 PM   #158
Alpha_Onion
Modaholic/Torque-Junkie
Alpha_Onion's Avatar
United_States
2
Rep
96
Posts

 
Drives: 2007 E90 335i (silver)
Join Date: Feb 2013
Location: Houston, TX

iTrader: (0)

Quote:
Originally Posted by Sparkee View Post
I'll give you what I believe to be the tuner's answer...
That actually explains it pretty well. I guess what I'm trying to achieve are two things; performance and comfort, properly balanced. That means:

- Eliminating almost all body roll

- Decreasing understeer while also allowing enough traction to the rear wheels (best front/rear bias)

- Maintaining some ride comfort (not excessively thick bars)

I will already have adjustable coilovers by the time I get sway bars. They'll be more of a finishing touch to the suspension.
__________________
2007 E90 335i Titanium Silver Metallic, Premium Package, Comfort Access Package
JB4 Borla catback & midpipes VRSF DP's AFE DCI w/ scoops 19" wheels ST V1 M3 control arms UR strut brace HID projector fogs LED Blacklines full LED conversion
Appreciate 0
      08-01-2013, 02:44 PM   #159
Javi335
Troll but nice
Javi335's Avatar
Spain
35
Rep
332
Posts

 
Drives: 335i E92
Join Date: Nov 2009
Location: Returning videotapes

iTrader: (0)

Hi gentlemans. What size of antiroll bar do you think is best than oem but without goes to stiff so you need to install a LSD?
__________________
There was me, that is Alex, and my three droogs, that is Pete, Georgie, and Dim, and we sat in the Korova Milkbar trying to make up our rassoodocks what to do with the evening. The Korova milkbar sold milk-plus, milk plus vellocet or synthemesc or drencrom, which is what we were drinking. This would sharpen you up and make you ready for a bit of the old ultra-violence.
Appreciate 0
      08-02-2013, 02:12 PM   #160
Javi335
Troll but nice
Javi335's Avatar
Spain
35
Rep
332
Posts

 
Drives: 335i E92
Join Date: Nov 2009
Location: Returning videotapes

iTrader: (0)

Quote:
Originally Posted by Javi335 View Post
Hi gentlemans. What size of antiroll bar do you think is best than oem but without goes to stiff so you need to install a LSD?
Maybe its my bad english fault. I try again.

I find stock bars are too soft.

but M3 are too stiff, need a LSD.

Logic must be "well, pick a number in the middle" ... but in practice it works like that? its a lineal formula?

Thx
__________________
There was me, that is Alex, and my three droogs, that is Pete, Georgie, and Dim, and we sat in the Korova Milkbar trying to make up our rassoodocks what to do with the evening. The Korova milkbar sold milk-plus, milk plus vellocet or synthemesc or drencrom, which is what we were drinking. This would sharpen you up and make you ready for a bit of the old ultra-violence.
Appreciate 0
      08-30-2013, 10:34 PM   #161
Bbox
Enlisted Member
Bbox's Avatar
United_States
1
Rep
48
Posts

 
Drives: 06 330i sedan
Join Date: Aug 2013
Location: Bay Area

iTrader: (0)

If you are installing stiffer springs or coilovers, then there's less of a need for stiffer swaybars. You're already going to get flatter cornering from the stiffer springs. So you're better off leaving the stock bars on. Don't let a business trick you into thinking you need to upgrade everything. Thicker bars usually destroy the ride quality, because they make the suspension less independent. On bumpy roads it's like driving a pickup truck with a solid axle.
Appreciate 0
      08-31-2013, 01:51 AM   #162
ashmostro
Lieutenant Colonel
ashmostro's Avatar
United_States
20
Rep
1,760
Posts

 
Drives: '13 335is DCT
Join Date: Jan 2013
Location: Vienna, VA

iTrader: (9)

Normally I'd agree but in practice my m3 bars feel a bit soft for my tastes, despite my ast coilovers.
Appreciate 0
      09-01-2013, 07:43 PM   #163
cwbiii
New Member
United_States
0
Rep
23
Posts

 
Drives: 2009 335d
Join Date: Aug 2013
Location: MA

iTrader: (0)

Garage List
2009 335d  [0.00]
2001 330i Convertible  [0.00]
about an inch

Quote:
Originally Posted by Marc Fitz View Post
Need some advice, I have a E90 320d M Sport and looking at installing the BMW performance Chassis Kit does anyone know how much this will lower the car.
Mine dropped a bit over an inch and was a bit too low... I pushed it back up 3/8 of an inch and it is just right.
Appreciate 0
      09-01-2013, 08:30 PM   #164
cwbiii
New Member
United_States
0
Rep
23
Posts

 
Drives: 2009 335d
Join Date: Aug 2013
Location: MA

iTrader: (0)

Garage List
2009 335d  [0.00]
2001 330i Convertible  [0.00]
last was a reply to ancient inquiry...

I upgraded to the "BMW performance suspension kit" quite a while ago to the tune of about $1400 plus labor (me and my son). It is a bit harsh of a ride but gives incredible feedback. Its my daily driver to the tune of about 22k miles per year. Its about twice as stiff as the sports suspension option. It rides about an inch+ lower. I brought that back up to about 3/4 of an inch and it is perfect. I seldom rub on anything. I try to avoid all the divet's in the road I can. The biggest problem with my car is rear traction.
I've upgraded to the sport wheels but it still is not enough... I'm going to try a sticky compound set of tires on my next tire change to see how much improvement that will give.

With the 335d I have so much torque that spinning the wheels is just about how hard I push the pedal down... if the electronics don't intervene. Tuning it up higher is a simple and inexpensive ECU reprogramming. A significant increase is advertised... though I should probably make a couple other changes if I plan on using it often. Larger intercooler, radiator and transmission cooling to keep up with the increased heat load.

The diesel reacts to controls slower than gasoline so auto crossing offers some new challenges in operator timing... especially braking into a tight turn and then powering out of it. It doesn't help that this car is a bit heavier than an e46. The ECU reprogramming is supposed to fix some of this sluggishness in the throttle control. When my warranty expires I may try to find out if any of this is going to add to my driving fun. Until then all I'm willing to do is dream and do research. Speaking of which I'm interested in any other 335d/x5d owners with mods and what they think of theirs.
Appreciate 0
      10-14-2013, 09:25 PM   #165
wantm135i
First Lieutenant
wantm135i's Avatar
United_States
4
Rep
390
Posts

 
Drives: x1 35i m sport
Join Date: Jun 2013
Location: va

iTrader: (0)

__________________
Appreciate 0
      10-29-2013, 10:27 PM   #166
wantm135i
First Lieutenant
wantm135i's Avatar
United_States
4
Rep
390
Posts

 
Drives: x1 35i m sport
Join Date: Jun 2013
Location: va

iTrader: (0)

got it all done


__________________
Appreciate 0
      10-30-2013, 03:19 AM   #167
ashmostro
Lieutenant Colonel
ashmostro's Avatar
United_States
20
Rep
1,760
Posts

 
Drives: '13 335is DCT
Join Date: Jan 2013
Location: Vienna, VA

iTrader: (9)

Looks great! How does it feel?
Appreciate 0
      10-30-2013, 06:06 AM   #168
GreekboyD
Colonel
Canada
44
Rep
2,677
Posts

 
Drives: 2009 BMW 335d
Join Date: Jan 2012
Location: Toronto, ON, Canada

iTrader: (0)

Garage List
2009 BMW 335d  [3.75]
Quote:
Originally Posted by cwbiii
I upgraded to the "BMW performance suspension kit" quite a while ago to the tune of about $1400 plus labor (me and my son). It is a bit harsh of a ride but gives incredible feedback. Its my daily driver to the tune of about 22k miles per year. Its about twice as stiff as the sports suspension option. It rides about an inch+ lower. I brought that back up to about 3/4 of an inch and it is perfect. I seldom rub on anything. I try to avoid all the divet's in the road I can. The biggest problem with my car is rear traction.
I've upgraded to the sport wheels but it still is not enough... I'm going to try a sticky compound set of tires on my next tire change to see how much improvement that will give.

With the 335d I have so much torque that spinning the wheels is just about how hard I push the pedal down... if the electronics don't intervene. Tuning it up higher is a simple and inexpensive ECU reprogramming. A significant increase is advertised... though I should probably make a couple other changes if I plan on using it often. Larger intercooler, radiator and transmission cooling to keep up with the increased heat load.

The diesel reacts to controls slower than gasoline so auto crossing offers some new challenges in operator timing... especially braking into a tight turn and then powering out of it. It doesn't help that this car is a bit heavier than an e46. The ECU reprogramming is supposed to fix some of this sluggishness in the throttle control. When my warranty expires I may try to find out if any of this is going to add to my driving fun. Until then all I'm willing to do is dream and do research. Speaking of which I'm interested in any other 335d/x5d owners with mods and what they think of theirs.
I also own a 335d as well. Click on it in "my garage" to see the suspension mods on it.
Appreciate 0
      11-01-2013, 10:13 AM   #169
JPfilipino
Private First Class
JPfilipino's Avatar
United_States
1
Rep
120
Posts

 
Drives: '11 328xi
Join Date: Oct 2013
Location: DC/Maryland

iTrader: (0)

328i vs 328i xDrive lowering Springs- Is there a difference?

Springs are my choice to go. I think ill do H&R
Appreciate 0
      11-04-2013, 02:07 PM   #170
Ali604
Private First Class
Canada
1
Rep
157
Posts

 
Drives: 2006 BMW 325i
Join Date: May 2013
Location: Vancouver

iTrader: (0)

Not sure if this question has already been answered, but couldnt find the answer on forums so here we go

I found a set of used KWv1 coilovers with about 40,000 kms on them. I was wondering how long do the KW v1 usually last in terms of mileage. The seller has it posted for $700. is this a reasonable price??
Appreciate 0
      11-15-2013, 09:11 PM   #171
jme93
New Member
0
Rep
27
Posts

 
Drives: 2007 e93 335iCab SMG, Sport,
Join Date: Jul 2013
Location: HK

iTrader: (0)

Improve turn in and higher speed handling

I've read through the whole thread, some great comments- thank you!

I have an '07 e93 335i sport with 24k miles on it as a DD. So far, I have put in a JB4 and PSS10's and replaced the bushings, dropped by about 1".

I would like to improve turn in and holding a line without stiffening it up too far- wondering what your suggestions would be for that as to sway bars or strut braces.

Also noticed at about 75mph/120kph I feel the steering is way too loose, especially under hard acceleration. My first thought was downforce but my e36&39 were stable at over 100mph.

Appreciate the advice.
Appreciate 0
      11-15-2013, 09:39 PM   #172
ashmostro
Lieutenant Colonel
ashmostro's Avatar
United_States
20
Rep
1,760
Posts

 
Drives: '13 335is DCT
Join Date: Jan 2013
Location: Vienna, VA

iTrader: (9)

Quote:
Originally Posted by jme93 View Post
I've read through the whole thread, some great comments- thank you!

I have an '07 e93 335i sport with 24k miles on it as a DD. So far, I have put in a JB4 and PSS10's and replaced the bushings, dropped by about 1".

I would like to improve turn in and holding a line without stiffening it up too far- wondering what your suggestions would be for that as to sway bars or strut braces.

Also noticed at about 75mph/120kph I feel the steering is way too loose, especially under hard acceleration. My first thought was downforce but my e36&39 were stable at over 100mph.

Appreciate the advice.
Alignment / camber I bet. Get your toe back in spec to help with the stability, and set up more negative camber up front relative to rear. Whatever you set your rear to, try to get one more negative degree up front relative to that- that will help with turn in and balance.
__________________
2013 335is DCT -- Quaife | JRZ RS1 - 450/800# | M3 + Hardrace arms | e93 M3 + Hotchkis f/r sways | BMS CP + OCC | ETS 5" IC | AFE DP's + DCI | RB PCV + Thermo Delete | Setrab + Improved Racing oil cooling | Stoptech f+r BBK | Cobb BQ Tune

Appreciate 0
      11-16-2013, 02:44 AM   #173
Alpha_Onion
Modaholic/Torque-Junkie
Alpha_Onion's Avatar
United_States
2
Rep
96
Posts

 
Drives: 2007 E90 335i (silver)
Join Date: Feb 2013
Location: Houston, TX

iTrader: (0)

If I were to get the Eibach Pro-Kit, would I be able to keep my factory non-sport shocks?
__________________
2007 E90 335i Titanium Silver Metallic, Premium Package, Comfort Access Package
JB4 Borla catback & midpipes VRSF DP's AFE DCI w/ scoops 19" wheels ST V1 M3 control arms UR strut brace HID projector fogs LED Blacklines full LED conversion
Appreciate 0
      11-16-2013, 04:31 PM   #174
jjellyneck
First Lieutenant
3
Rep
335
Posts

 
Drives: 2008 335i MT
Join Date: Jun 2012
Location: TX

iTrader: (0)

Quote:
Originally Posted by ashmostro View Post
Alignment / camber I bet. Get your toe back in spec to help with the stability, and set up more negative camber up front relative to rear. Whatever you set your rear to, try to get one more negative degree up front relative to that- that will help with turn in and balance.
I agree. Another set of components you might want to add are the M3 control arms and tension arms for the front suspension. It helps make the front end and steering more precise. Handling and response is better overall for me...but now I notice the mushiness of the rear suspension bushings more than before! The tighter front brought out the weaknesses of the back...or just made them more noticeable because I can drive faster inn all turns now. Ah well.
Appreciate 0
      11-17-2013, 06:12 PM   #175
Alpha_Onion
Modaholic/Torque-Junkie
Alpha_Onion's Avatar
United_States
2
Rep
96
Posts

 
Drives: 2007 E90 335i (silver)
Join Date: Feb 2013
Location: Houston, TX

iTrader: (0)

Ok, disregard my above post. I've decided that I want to keep my non-sport suspension for now, but replace the front springs with ZSP springs, just to lower the front of the car a little. Will this work or do I need to get an entire ZSP kit?
__________________
2007 E90 335i Titanium Silver Metallic, Premium Package, Comfort Access Package
JB4 Borla catback & midpipes VRSF DP's AFE DCI w/ scoops 19" wheels ST V1 M3 control arms UR strut brace HID projector fogs LED Blacklines full LED conversion
Appreciate 0
      11-17-2013, 07:05 PM   #176
ashmostro
Lieutenant Colonel
ashmostro's Avatar
United_States
20
Rep
1,760
Posts

 
Drives: '13 335is DCT
Join Date: Jan 2013
Location: Vienna, VA

iTrader: (9)

Get the full set, regardless of what you get.

But I think the zsp springs aren't a big enough improvement to justify the cost and effort.
Appreciate 0
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 11:04 PM.




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