FSD/Eibach Question for 550
01-19-2009, 12:36 AM
#1
Members
Thread Starter
Join Date: May 2008
Posts: 116
Likes: 0
Received 0 Likes
on
0 Posts
So I've installed the Koni FSD/Eibach combination for my 07 550. Have a quick question, wondering if anyone has ran into this issue. This was installed several months ago and recently I had 3-4 people in the car and it was bottoming out horribly. Doing 70mph on freeways, the front & rear bottoms out over expansion joints/overpasses. Bottom of the car doesn't have scrape marks either. Didnt see any instructions in the box either. I verified the part #'s on the box and I did get the set for the 550. Tirerack said I can just return it, but I do like this alot 
Anyone have pointers? Thanks
Anyone have pointers? Thanks
01-19-2009, 12:45 AM
#2
Contributors
Join Date: May 2007
Location: Washington D.C.
Posts: 658
Likes: 0
Received 0 Likes
on
0 Posts
My Ride: 5series
Model Year: 2004
hmm... 
Same thing happened to me today when I was on the highway my car bottomed out on the expansion joints entering and exiting the bridge, also I am trying to replace my shocks and want the FSD's how do you like them, btw will this work with h&r sports since the eibachs are only a little different, thanks
Same thing happened to me today when I was on the highway my car bottomed out on the expansion joints entering and exiting the bridge, also I am trying to replace my shocks and want the FSD's how do you like them, btw will this work with h&r sports since the eibachs are only a little different, thanks
01-19-2009, 03:04 PM
#5
Contributors
Join Date: Jun 2008
Location: Tacoma, WA
Posts: 5,501
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by peter@vmrwheels' post='771893' date='Jan 19 2009, 03:57 PM
Just 19's, with proper offset. After all, I make wheels
Not sure if this is a spring rate, bumpstop, or fsd issue.
Not sure if this is a spring rate, bumpstop, or fsd issue.
It is probably the shocks. If you can increase the stiffness of the shocks I would do that first. If you can't thats where I would guess the issue is coming from.
01-19-2009, 03:54 PM
#6
Senior Members
Join Date: Nov 2007
Location: Boston, US
Posts: 1,168
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by peter@vmrwheels' post='771402' date='Jan 19 2009, 04:36 AM
So I've installed the Koni FSD/Eibach combination for my 07 550. Have a quick question, wondering if anyone has ran into this issue. This was installed several months ago and recently I had 3-4 people in the car and it was bottoming out horribly. Doing 70mph on freeways, the front & rear bottoms out over expansion joints/overpasses. Bottom of the car doesn't have scrape marks either. Didnt see any instructions in the box either. I verified the part #'s on the box and I did get the set for the 550. Tirerack said I can just return it, but I do like this alot
Anyone have pointers? Thanks
Anyone have pointers? Thanks
I was considering the FSD's after reading so many good things about them but I don't plan on lowering my car. I have already scraped over some speed bumps and road imperfections at 2-5 MPH.
01-19-2009, 05:15 PM
#7
Senior Members
Join Date: Feb 2007
Location: Socal-90601
Posts: 1,626
Likes: 0
Received 0 Likes
on
0 Posts
Make sure the struts are not leaking, also make sure tire pressure is enough for the people you have in the car. Give Koni tech line a call and see what they say
01-20-2009, 02:37 PM
#9
Senior Members
Join Date: Mar 2007
Location: Santa Clara, CA
Posts: 784
Likes: 0
Received 0 Likes
on
0 Posts
Peter,
The real solution here is to tell your friends to stop eating so much
With that said, I've never had a customer complain about bottoming out with this setup, maybe you need a set of bump stops?
The real solution here is to tell your friends to stop eating so much
With that said, I've never had a customer complain about bottoming out with this setup, maybe you need a set of bump stops?
01-20-2009, 03:34 PM
#10
Members
Senior Members
Join Date: Sep 2006
Location: Omaha, NE - USA
Posts: 3,238
Likes: 0
Received 1 Like
on
1 Post
My Ride: MY07 525xi Silver Gray
Model Year: 2007
Do you use any bump stop? If you do then bottoming out you mean as it hit the bump stop? Maybe you just need to trim the bump stop.