Hmmm. I thought it was the bumpstops that I'm hitting but apparently the shocks are basically bottoming out... no bumpstops. I did remember the dampening being very light compared to the H&R's. Is there a place on the FSD where I can chk the part number to make sure I didn't get one for the V6?

 

So you dont have any bumpstops in there at all? If no, then trim some oem bumpstops and put it in there.

Hopefully that solves the problem.

 

I think any amount of lowering on the stock e60 damper arrangement could lead to bottoming out probs. There is so little suspension travel, with stock sport springs theres only around 1in of travel before hitting the bump stops, so lowering springs are going to have the car virtually sitting on the b stops.
For a decent ride the stock damper dimensions are only really suited to stock ride ht, so any lowering is going to compromise the ride quality imo. For lowering without compromise i can only see coilovers being the totally correct solution.
Ive trimmed my bump stops and it is a massive improvement and acceptable most of the time, but the occational pot hole still upsets the car and im using sport springs with fsd's, so only around 5/8 lower than stock se.

Some further info here.

http://forums.e60.net/lofiversion/index.php/t58919.html

 

I think this is quite normal, I have stock sport package and 20's, I rub all the time. It bothered me at first, but after reading how many other people have this, it not longer feels like a 'problem' just a symptom of running out of spec equipment.

 

I think FSD with Eibach combination lowers the car only slightly, so it's interesting to hear this issue. FSD is supposed to help get over bumps quite smoothly. I've been thinking that this could be a good combination for my non sport 528i.

 

From my understanding, although people do use FSDs when lowering slightly they are supposed to be used with stock springs. Thsi may also be the reason for bottoming out. I have just bought some H&R sport springs and Koni yellow adjustable shocks. Hmmm, wonder what to do about the bump stops now???

 

wait so if u have sports package and get h&r sport springs you still need to cut the bump stops?

 

Monotube shocks like bilstein (not familiar with koni engineering) have an internal bump stop. The difference between the HD and the sport is the length of the piston so that it will not bottom out or leave the springs bouncing around when the suspension is unloaded.



i don;t think you'd need to cut your bump stops for the 4mm difference.

 

koo thanks!

 

I have the Koni FSD's and I just stiffen the shocks and don't have an issue with people in the car unless I hit a BIG bump. That is even without fenders rolled. Even then, when I do rub, its the fender, I never, ever bottom-out. I'm also running H&R sport springs, not Eibach.