|
|
|
|
|
|
BMW Garage | BMW Meets | Register | Today's Posts | Search |
|
BMW 3-Series (E90 E92) Forum
>
Changing suspension again - FSD/Eibach. Upgrade bump stops?
|
|
09-29-2010, 04:06 PM | #1 |
Lieutenant
117
Rep 557
Posts |
Changing suspension again - FSD/Eibach. Upgrade bump stops?
So I'm changing from the ST coilovers after only a week of use, they're still too firm for Seattle streets (at least on 19"s). I'm going the conservative route this time with Koni FSD shocks and Eibach pro kit springs. Based on my previous experience with the H&R sport springs over OEM sport shocks, I'd like to change to a shorter bump stop in the front. When I was on the H&R springs, there was so little suspension travel from the drop that the bump stop was always engaged until I trimmed it down to only about 1.25" remaining. The Eibach spring is a similar drop and I'm concerned I may encounter the same issue. FWIW, Eibach says no trimming is required in the front (however they recommend trimming 1" in the back).
Is there any harm in proactively changing to a shorter bump stop in the front with the Eibach/FSD combo? I'm thinking of changing to the E36 Z3M bump stop, part # 31332225377. It looks about .5" shorter than the OEM 335 bump stop. I know that user subieworx changed to these with good results. But can anyone else with Eibach/FSDs comment on whether I need to change bump stops? I've searched and there's not much out there. Here's the OEM 335 vs Z3M bump stop picture from subieworx's post: |
09-30-2010, 02:27 PM | #2 |
Lieutenant
117
Rep 557
Posts |
Come on, I know at least some people have changed their bump stops when lowering. What's worked?
Anyone tried E90 M3 bump stops on their lowered 335i? These look like they may be even at bit shorter than the E36 M3/Z3M. |
Appreciate
0
|
10-01-2010, 03:14 AM | #3 |
Major
94
Rep 1,184
Posts |
GO for the Z3M bump stops, they are shorter than the E90 M3
E90M3 people with short springs go with the Z3M stops to increase suspension travel |
Appreciate
1
335dwanted21.50 |
10-01-2010, 01:49 PM | #5 |
Lamininist
82
Rep 1,030
Posts |
|
Appreciate
0
|
10-02-2010, 01:54 PM | #7 |
Lieutenant
117
Rep 557
Posts |
Yves, just ordered all the parts so I wont have them installed until next week. Will post a review as soon as i have it done and aligned.
I called Dinan and spoke to a tech there who was very friendly and agreed that E36 M3 bump stops are the way to go for this conservative drop. |
Appreciate
0
|
10-03-2010, 01:36 PM | #8 | |
Lamininist
82
Rep 1,030
Posts |
Quote:
Cheers Yves |
|
Appreciate
0
|
01-14-2011, 12:48 AM | #13 |
Major
106
Rep 1,428
Posts |
if you guys want a better ride buy a new car, my previous car was a five series and at the time i thought it was the best handling car ive ever owned. im so sick of women bitching about ride quality
|
Appreciate
0
|
01-14-2011, 12:51 AM | #14 |
Major
106
Rep 1,428
Posts |
seriously you **** are bitching about koni fsd's and the pro kit. thats no different then the sport package. go buy a five series and leave everyone alone.
|
Appreciate
0
|
01-14-2011, 01:08 AM | #15 |
Major
106
Rep 1,428
Posts |
and hey 3times3 after reading this post months ago i called eibach and they said not to trim any of the bump stops so i guess we talked to two different people.
|
Appreciate
0
|
01-14-2011, 01:11 AM | #16 |
Major
106
Rep 1,428
Posts |
|
Appreciate
0
|
01-14-2011, 06:21 PM | #17 |
Second Lieutenant
11
Rep 202
Posts |
+1
__________________
2012 E89 35iS
|
Appreciate
0
|
01-14-2011, 08:33 PM | #18 |
this is the way
18148
Rep 8,524
Posts |
|
Appreciate
0
|
01-18-2011, 05:40 PM | #19 |
Supreme Allied Commander
3843
Rep 54,362
Posts
Drives: F80 M3
Join Date: Mar 2007
Location: Santa Barbara, AP, Brembo, GIAC, Koni, Ohlins, Performance Friction, www.hpautosport.com
|
Remember that the bump stop is there to give you a controlled bottoming of the suspension as well as preventing any internal damage of your dampers. You need to make sure the bump stop you use is of the correct length and progressive, so you don't get a sudden bottoming and lose traction.
Use bump stops, you need them. With the correct bump stop(shorter is not better) and proper spring rates(higher is not better), you will have more mechanical grip and more cornering power. |
Appreciate
0
|
01-18-2011, 07:09 PM | #20 | |
Booosted
44
Rep 832
Posts |
Quote:
__________________
2008 BMW 335i//Jet Black on Black Dakota Leather//Steptronic, Sport Package, Premium Package, Logic7 Sound, Aluminum Trim, iPOD & USB, Cobb S1+ Sport, ER FMIC, ER CP, K&N Filter, H&R Sport Springs, Koni Yellows, ECS Tuning spacers (F-10mm/R-15mm), Akebono pads, OEM Rear Aero Spoiler, OEM Sport Diffusor, Cyba 3.8" Tips, OEM Aluminum Pedals, M-tech Steering Wheel, Clear Reflectors
|
|
Appreciate
0
|
01-18-2011, 10:48 PM | #21 |
Supreme Allied Commander
3843
Rep 54,362
Posts
Drives: F80 M3
Join Date: Mar 2007
Location: Santa Barbara, AP, Brembo, GIAC, Koni, Ohlins, Performance Friction, www.hpautosport.com
|
If you are changing your springs and struts/dampers, you will get a firmer ride than stock, but a better controlled ride. However, H&R's lowers the car a bit too much for my taste and reduces compression travel. Slightly shorter bump stops can be used to gain a bit of compression travel, but you must do some testing to make sure you will not damage the struts/dampers with shorter than supplied/recommended bump stops. You will also void the warranty of the struts/dampers by installing shorter bump stops.
|
Appreciate
0
|
03-25-2011, 05:01 PM | #22 |
this is the way
18148
Rep 8,524
Posts |
Regarding the e36 bump stop, does anyone know if there is a big difference in its overall height when under compression vs the stock e9x one? My concern is if I get the e36 bump stops there's a chance it could compress over a large bump to the point that I rub. Also being a suspension n00b do you only need these for the front or rear as well?
Thanks |
Appreciate
0
|
Bookmarks |
|
|