View Single Post
      10-30-2009, 09:13 AM   #8
Radiation Joe
Veni Vidi Vici
Radiation Joe's Avatar

Drives: '11 JB/BBe-6sp-e90
Join Date: Jul 2008
Location: Macungie PA

iTrader: (0)

Garage List
2011 e90 M3-Sold  [4.25]
2003 RS6 - Sold  [0.00]
2009 e90 M3 - Gone  [0.00]
2003 M3 SOLD  [0.00]
old 2002  [5.00]
Originally Posted by Lemans_Blue_M View Post
I mean the RD Sport's progressive spring rate in the front will be much firmer (stiffer) than the softer Eibach springs in the rear.

That will hurt the overall balance & handling characteristics of the car.

This is exactly why all lowering springs are engineered and sold in matched sets(front and rear 4-spring kits), instead of an assortment of 'mix-n-match' pieces.
Just playing devil's advocate here, but:

If you know what you are doing, and have a specific goal in mind, I don't have a problem mixing and matching. Spring retailers create a set-up based on what they think the average buyer will like. You may not be the average buyer.

I personally like a very stiff front end and a soft rear end (no comments on that please). When I ordered my springs from Ground-Control for the e46, I was able to set them up to my preferences.

However, if you don't know what you are doing, you can end up with a very strange handling car.