In Reply to: Need LOTS of help: 99 M3 suspension posted by Jonny Estoril on September 17, 2000 at 16:25:27:
I have a little bit of info. that might help you out. To the best of my knowledge, BMW changed the suspension in '96. All the OBDII cars ('96-'99) seem to sit significantly higher in the front than the '95's do. So what changed? Josh, a very knowledgable guy on this board has told me that the upper spring plate and upper spring pad are different. I have also found out that the upper control arm is differnet on the later models. (http://members.aol.com/benliaw/bmw.htm)
First of all, Bilstein/H&R is the BEST setup you can buy for the M3. While just an opinion, I believe that the quality and R&D put into these two is far greater than Koni/Eibach. 9 out of 10 people I have run into recommend Bilstein/H&R.
I have a '98 M3. I first purchased the H&R Sport springs with my Bilstein's and wasn't happy with the sports. They didn't drop the car more than .5 in the front and .25 in the rear. They also were not as stiff as I expected. I sold them and got the Race springs. Now THESE handled awesome!!!! They are not too stiff, in my opinion and we have some pretty bad roads in the Austin, TX area..especailly downtown. So the car handles great but still doesn't look so good. The Race springs did not lower it much more in the front than the sports. My friend's '95 with the same setup is almost an 1" lower in the front than mine!!!
I called H&R and asked them about a rumor circulating this board about some "revised" race springs that will correct this problem. They knew nothing about it and just told me to trim the bumpstops. That's crazy!!! The bumstops are internal and doing so would void the warranty. Plus, I think that we should not have to re-engineer all of Bilstein's work to get this solved. I called Bilstein and they said it's possible to trim the stops but should not be needed. I called TurnerMotorsport and BMP Racing and both said NOT to trim the bumpstops; so the general consensus is NO!!!
Josh is going to install the '95 upper spring plate and pad this week on his '97 to see if this corrects the problem. If that doesn't do it, he and I will keep trying to find a solution.
E-mail me so I can get back with you on what we find out.
Here is a pic of my car right now with H&R Race Springs and Bilstein Sport Shocks. (Not low enough!!!)
Hope this is of some help. Talk to you soon.