E90Post
 


The Tire Rack
 
BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Technical Forums > Suspension | Brakes | Chassis > Suspension Advice: I want an agressive street suspension setup with no lowering



Reply
 
Thread Tools Search this Thread
      03-28-2017, 08:34 AM   #1
Joester
Grand Champion
Joester's Avatar
75
Rep
251
Posts

Drives: 2011 328i
Join Date: Dec 2014
Location: St. Louis

iTrader: (0)

Suspension Advice: I want an agressive street suspension setup with no lowering

Hey fellas, I have an LCI e90 328i and the stock sport suspension's dampers are wearing out at 84k miles. I can feel the back end especially bounce around over bumps as though the suspension is severely under-damped. The car just floats and boats its way around corners and over bumps instead of hugging and adsorbing the road like it should.

I'd like new dampers and springs, but I don't want to lower the car much at all. I'd like a nice firm ride, but this is my DD so nothing too crazy harsh.

What are my options? It sounds like most or even all coilovers will lower the car a little bit. A half an inch isn't too big a deal, I guess, but an inch or more and I don't think I will like how the car looks. I think how it sits on its OEM sport suspension is perfect from an aesthetic and functional standpoint.

Is there an OEM option that is stiffer than the sport suspension? It looks like BMW makes the performance suspension option that might be what I want, but also lowers the car another half inch. I've got to do some reading about that kit.


EDIT: I've read up on the BMW perf suspension and it seems like half the people that install it love it and the other half despise it.

I'm still lost, lol.
__________________
2011 328i - Black on Black, Sport Package, Premium Package, Cold Weather Package, Xenons, 3.73 diff swap

Gone But Not Forgotten - 2009 135i - Black on Black M-sport JB4

Last edited by Joester; 03-28-2017 at 09:00 AM.
Appreciate 0
      03-28-2017, 10:36 AM   #2
gjm120
Lieutenant
United_States
117
Rep
416
Posts

Drives: 2013 128i
Join Date: Jan 2016
Location: East Texas

iTrader: (0)

I went thru the same thing with my 128i a while back. Wanted better and firmer handling but not much drop. Check out the Suspension section on the 1er site. Last post on the thread was in Feb of this year.
Appreciate 0
      03-28-2017, 10:59 AM   #3
Joester
Grand Champion
Joester's Avatar
75
Rep
251
Posts

Drives: 2011 328i
Join Date: Dec 2014
Location: St. Louis

iTrader: (0)

Thanks. Here's the thread for others that are curious

http://www.1addicts.com/forums/showthread.php?t=1280819
__________________
2011 328i - Black on Black, Sport Package, Premium Package, Cold Weather Package, Xenons, 3.73 diff swap

Gone But Not Forgotten - 2009 135i - Black on Black M-sport JB4
Appreciate 1
      03-28-2017, 11:36 AM   #4
boro92
Second Lieutenant
90
Rep
267
Posts

Drives: audi s4 lol!
Join Date: Jan 2016
Location: canada

iTrader: (0)

PSS10 can be run at stock height.
Alternative is to keep the stock springs and run Bilstien B8 or Koni Sports.
__________________
http://dreamingin302ci.blogspot.com

Track day & Car setup blog
Appreciate 1
      03-28-2017, 01:27 PM   #5
AtlasM
Captain
AtlasM's Avatar
United_States
172
Rep
627
Posts

Drives: '11 E92 335xi 6MT
Join Date: Jun 2013
Location: Madison, WI

iTrader: (0)

Garage List
You could keep the stock springs and upgrade other areas.

Easiest to do would be performance shocks and upgraded rear shock mounts, especially the rear upper mounts. Monroe makes some harder rubber ones that are cheap. Upper are part # 907984 and lower are part # 907985. In the front, you could upgrade to M3 control arms.

https://www.ecstuning.com/b-trw-part...3322283547kt4/

You could also add camber kits in front (these replace the stock upper shock mounts) to dial in an alignment with more negative camber which will improve steering response and grip.

More labor involved would be to replace the rear subframe bushings, which are also part of the cause of rear end floatiness. You have to drop the subframe to do this. Whiteline makes a kit (part # KDT917) cheaper and easier to install than M3 subframe bushings while also being stiffer. I have it on my car. The rear end is much more consistent feeling than stock.

Replacing the rear sway bar also requires lowering the subframe so if you do the subframe bushings, it's a good time to also do the sway bars. If you want the car to be more tail-happy you would go for a larger relative increase of rear sway bar vs. front, so personally I would not just add a rear sway bar to a rwd E9x. From most to least tail-happy of the front & rear sway bar combos, you have H&R and Whiteline at 27mm F/20mm R, Eibach at 28mm/15mm, and Hotchkis at 32mm/16mm. With stock springs, I would probably go with H&R or Whiteline sway bars, or Eibach if you want a bit more conservative setup. The Hotchkis front bar is huge so their set is a better match for springs or coilovers which have relatively stiffer rear springs.

Point being, if you like your stock sport package ride height and spring rates, you could do plenty of upgrades while keeping the stock springs.
Appreciate 1
      03-28-2017, 01:44 PM   #6
chris@strutmonkey
chris@strutmonkey's Avatar
United_States
89
Rep
331
Posts

Drives: 2007 BMW 335i
Join Date: Dec 2009
Location: Northern Virginia

iTrader: (0)

Bilstein B8 and Dinan springs.
Appreciate 2
      03-28-2017, 01:53 PM   #7
chris@strutmonkey
chris@strutmonkey's Avatar
United_States
89
Rep
331
Posts

Drives: 2007 BMW 335i
Join Date: Dec 2009
Location: Northern Virginia

iTrader: (0)

Here is a Dinan spring kit (on Koni Yellow) for reference... if you replace your shocks/springs, make sure you also replace the strut mounts, spring pads, and get new, shortened bumpstops, etc.

Name:  koni dinan.jpg
Views: 843
Size:  77.2 KB
Appreciate 1
      03-28-2017, 02:38 PM   #8
avocet
Captain
113
Rep
969
Posts

Drives: 2007 328i
Join Date: Sep 2010
Location: Vancouver bc

iTrader: (0)

Running Bils HD's with sport suspension is a perfect match, in my opinion. I would also suggest upgrading(not just new) shock mounts and installing either subframe inserts or m3/aftermarket subframe bushings.

This alone will transform your car and solve all the 'bounciness' issues. Down the road you can decide on things like sway bars, control arms etc. I also think as a daily you don't need a stiffer spring than the sport spring. The Bilstein hd damping quality will outperform any lower to mid range coilover out there, IMHO.

Last edited by avocet; 03-28-2017 at 02:43 PM.
Appreciate 0
      03-29-2017, 01:22 AM   #9
tlow98
Lieutenant Colonel
363
Rep
1,932
Posts

Drives: 2009 E91
Join Date: Aug 2011
Location: Bay Area

iTrader: (1)

Bilstein like mentioned above is a great choice. Koni yellows would also fit the bill while keeping your stock springs. The Koni will have a slightly cushier ride at lower speeds but likely will lack the bilsteins high speed performance. Very slight trade off.

By the way, I'm totally on board with where you're going. I want the same with my car.

Other great add ons:
Whiteline subframe insert (mentioned above)
Monroe rear shock mounts
Front M3 control arms

Likely most important: non run flat tires.
Appreciate 0
      03-29-2017, 02:30 AM   #10
BdSM n54iS
Colonel
BdSM n54iS's Avatar
United_States
650
Rep
2,013
Posts

Drives: In front of flashing lights
Join Date: Aug 2015
Location: Pulled over on the side of the road

iTrader: (2)

Quote:
Originally Posted by chris@strutmonkey View Post
Here is a Dinan spring kit (on Koni Yellow) for reference... if you replace your shocks/springs, make sure you also replace the strut mounts, spring pads, and get new, shortened bumpstops, etc.

Attachment 1596845
Hey Chris, do you by chance know what the spring rates are for those Dinans? I'm thinking pretty much comparable if not the same to the BMWPS yellow springs, 195F/505R? Any other advantage to running those vs. the yellows?

Thanks
__________________
'11 335is MT BSM/Black | NAV | Premium | Convenience | Cold | HK | MHD | Cobb FMIC | Cobb CP | Cobb DP | aFe stage 2 SI | TurboSmart Dual Ports | BMS OCC | RB PCV Valve | Turner Spacers | Michelin PSS | BMW Performance CF Spoiler | BMW Performance CF Front Lip | BMW Performance ///M Wheel | Sprint Booster | remoteKEY+
Appreciate 0
      04-05-2017, 09:32 AM   #11
chris@strutmonkey
chris@strutmonkey's Avatar
United_States
89
Rep
331
Posts

Drives: 2007 BMW 335i
Join Date: Dec 2009
Location: Northern Virginia

iTrader: (0)

I believe the Dinan springs are 30% higher spring rates than stock. Not sure if that is compared to non-sport or sport springs. Dinan and BMW PS are pretty similar. Dinan are less expensive. Neither drop your car very much.

Quote:
Originally Posted by BdSM n54iS View Post
Hey Chris, do you by chance know what the spring rates are for those Dinans? I'm thinking pretty much comparable if not the same to the BMWPS yellow springs, 195F/505R? Any other advantage to running those vs. the yellows?

Thanks
Appreciate 1
      04-05-2017, 10:06 AM   #12
Donutz
First Lieutenant
56
Rep
318
Posts

Drives: 335i
Join Date: Sep 2015
Location: Toronto, eh

iTrader: (2)

I was in the same situation; didn't want to lower my car and wanted to upgrade my suspension from the oem sport suspension (155k kms on mine). I bought the bmw performance yellow springs and bilstein B8. Haven't installed them yet l so I can't comment on ride quality.

I considered the full bmw performance suspension because it appeared to be such a good value but was concerned about the longevity of the struts / shocks.
Appreciate 0
      04-05-2017, 10:48 AM   #13
Joester
Grand Champion
Joester's Avatar
75
Rep
251
Posts

Drives: 2011 328i
Join Date: Dec 2014
Location: St. Louis

iTrader: (0)

Quote:
Originally Posted by Donutz View Post
I was in the same situation; didn't want to lower my car and wanted to upgrade my suspension from the oem sport suspension (155k kms on mine). I bought the bmw performance yellow springs and bilstein B8. Haven't installed them yet l so I can't comment on ride quality.

I considered the full bmw performance suspension because it appeared to be such a good value but was concerned about the longevity of the struts / shocks.
Install them so that you can tell me how they feel!
__________________
2011 328i - Black on Black, Sport Package, Premium Package, Cold Weather Package, Xenons, 3.73 diff swap

Gone But Not Forgotten - 2009 135i - Black on Black M-sport JB4
Appreciate 0
      04-05-2017, 11:21 AM   #14
rothwem
Captain
United_States
103
Rep
721
Posts

Drives: 2009 E91 328xi 6mt
Join Date: Apr 2009
Location: Raleigh, NC

iTrader: (0)

Garage List
Quote:
Originally Posted by Joester View Post
The car just floats and boats its way around corners and over bumps instead of hugging and adsorbing the road like it should.
Just a suggestion, I would put your car up on some ramps or a lift and inspect all of the suspension bushings. My previous sport pack E90 did not do what you described at all, I thought that the OEM sport suspension, if anything, was a little harsh.

I just don't want you to go and pimp out your shocks and still have suspension wallow.
Appreciate 0
      04-06-2017, 03:54 PM   #15
MrN1ceGuy
Private
MrN1ceGuy's Avatar
United_States
2
Rep
74
Posts

Drives: SGM E90 330i 6MT ZSP ZPP
Join Date: Nov 2014
Location: Facebook HQ

iTrader: (0)

Check out the Tein S-tech. Their spring rates are well matched and only further lower the factory sport suspension by about half an inch. I have had them for almost a year and they have works marvelously with my Bilstein B8s. Especially at higher speed.
__________________
E90 330i 6MT ZSP
BMW Performance Exhast///M-Tech Steering Wheel, Shift Knob and Pedal Set///M3 Suspension Arms///Tein S-Tech///Bilstein Sports
Appreciate 0
      04-18-2017, 11:31 PM   #16
BdSM n54iS
Colonel
BdSM n54iS's Avatar
United_States
650
Rep
2,013
Posts

Drives: In front of flashing lights
Join Date: Aug 2015
Location: Pulled over on the side of the road

iTrader: (2)

Quote:
Originally Posted by Donutz View Post
I was in the same situation; didn't want to lower my car and wanted to upgrade my suspension from the oem sport suspension (155k kms on mine). I bought the bmw performance yellow springs and bilstein B8. Haven't installed them yet l so I can't comment on ride quality.

I considered the full bmw performance suspension because it appeared to be such a good value but was concerned about the longevity of the struts / shocks.
So..... have you installed them?? Haha
__________________
'11 335is MT BSM/Black | NAV | Premium | Convenience | Cold | HK | MHD | Cobb FMIC | Cobb CP | Cobb DP | aFe stage 2 SI | TurboSmart Dual Ports | BMS OCC | RB PCV Valve | Turner Spacers | Michelin PSS | BMW Performance CF Spoiler | BMW Performance CF Front Lip | BMW Performance ///M Wheel | Sprint Booster | remoteKEY+
Appreciate 0
      04-19-2017, 02:13 PM   #17
Donutz
First Lieutenant
56
Rep
318
Posts

Drives: 335i
Join Date: Sep 2015
Location: Toronto, eh

iTrader: (2)

Quote:
Originally Posted by BdSM n54iS View Post
So..... have you installed them?? Haha
Unfortunately I have not, and it looks like I won't be installing the springs. There is a lot of misinformation on this forum and around the interwebs about which part numbers to buy; the lesson I learned is PM Jason or Evan at Tischer (good dudes) and ask them the correct part numbers for your VIN. I used information from BMWUSA's website, which is inaccurate (and I failed at reading), when I bought my springs. I will soon be listing them for sale locally.
Appreciate 0
      04-20-2017, 11:07 PM   #18
BdSM n54iS
Colonel
BdSM n54iS's Avatar
United_States
650
Rep
2,013
Posts

Drives: In front of flashing lights
Join Date: Aug 2015
Location: Pulled over on the side of the road

iTrader: (2)

Quote:
Originally Posted by Donutz View Post
Unfortunately I have not, and it looks like I won't be installing the springs. There is a lot of misinformation on this forum and around the interwebs about which part numbers to buy; the lesson I learned is PM Jason or Evan at Tischer (good dudes) and ask them the correct part numbers for your VIN. I used information from BMWUSA's website, which is inaccurate (and I failed at reading), when I bought my springs. I will soon be listing them for sale locally.
Wow that sucks, sorry to hear. I would think bmw usa site would be accurate, it has been for me in the past. Yes Tischer I like a lot, if those springs fit my car I would buy them off of you in a heartbeat.
__________________
'11 335is MT BSM/Black | NAV | Premium | Convenience | Cold | HK | MHD | Cobb FMIC | Cobb CP | Cobb DP | aFe stage 2 SI | TurboSmart Dual Ports | BMS OCC | RB PCV Valve | Turner Spacers | Michelin PSS | BMW Performance CF Spoiler | BMW Performance CF Front Lip | BMW Performance ///M Wheel | Sprint Booster | remoteKEY+
Appreciate 0
      05-30-2017, 09:55 AM   #19
Joester
Grand Champion
Joester's Avatar
75
Rep
251
Posts

Drives: 2011 328i
Join Date: Dec 2014
Location: St. Louis

iTrader: (0)

So after reading more and deliberating, I'm really leaning towards Bilstein B8s on my stock sport suspension springs.

There have been a few in this very thread that have said that this is a good combo, can anyone else comment on it?

Also, is there a full list out there somewhere of parts that need to be replaced along with the struts? Like mounts, bushings, bolts, etc.
__________________
2011 328i - Black on Black, Sport Package, Premium Package, Cold Weather Package, Xenons, 3.73 diff swap

Gone But Not Forgotten - 2009 135i - Black on Black M-sport JB4
Appreciate 0
      05-30-2017, 11:11 AM   #20
SE7EN335
First Lieutenant
40
Rep
372
Posts

Drives: 335i
Join Date: Aug 2015
Location: Australia

iTrader: (1)

Quote:
Originally Posted by chris@strutmonkey View Post
Here is a Dinan spring kit (on Koni Yellow) for reference... if you replace your shocks/springs, make sure you also replace the strut mounts, spring pads, and get new, shortened bumpstops, etc.

Attachment 1596845
Is the Koni yellows more comfortable than the B8s? or B8s are more comfortable than koni yellows?
Appreciate 0
      05-30-2017, 07:43 PM   #21
PourBoi-Jay
Lieutenant
PourBoi-Jay's Avatar
United_States
135
Rep
495
Posts

Drives: 2009 335i M-Sport
Join Date: Jun 2014
Location: Bristol, CT

iTrader: (3)

I got the B12 kit, which comes with B8 struts and Eibach Springs, and my car has not lowered from the factory MSport setup I originally had. Been driving on them for about 1000miles so far. Cost me $743 shipped for the kit.

As for the list of other parts that need to be replaced....here are the RealOEM links for the front and rear:

Front
http://www.realoem.com/bmw/enUS/show...diagId=31_0716

Rear
http://www.realoem.com/bmw/enUS/show...diagId=33_1263

For the rear upper strut mount, go with the Monroe Kit:
https://www.fcpeuro.com/products/bmw...-monroe-907984
You'll need two kits

All will make a huge difference. I replaced everything when I installed my B12 kit, and the car is super smooth.
__________________
2009 E90 335i
Black Sapphire || Oyster || M-Sport || 6spd
BMW-Performance||OEM+||Cobb||Wagner||CP-e||AFE||Forge||ER||BMS||Lux||RB||Michelin||Manzo|| Bilstein||Eibach||Whiteline
Appreciate 0
      05-30-2017, 11:07 PM   #22
Joester
Grand Champion
Joester's Avatar
75
Rep
251
Posts

Drives: 2011 328i
Join Date: Dec 2014
Location: St. Louis

iTrader: (0)

Eibach pro-kit is nearly the exact same rates as my OEM sport springs, is there any reason to purchase them besides the ride height?
__________________
2011 328i - Black on Black, Sport Package, Premium Package, Cold Weather Package, Xenons, 3.73 diff swap

Gone But Not Forgotten - 2009 135i - Black on Black M-sport JB4
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


All times are GMT -4. The time now is 06:03 PM.




e90post
Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2018, 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