progressive rate springs

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Ian C

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Has anyone fitted W&Ns CSL progressive rate springs to their car? According to W&N they will drop the ride height of my 2800cs by about 15-25 mm, which is about what I want. I'm fitting Bilstein B6 sport dampers, but am not sure if the springs will suit the heavier car.
Ian
 
CSL springs from W&N

I have these on several cars. I have come to the conclusion that they lower the car too much at the rear, even when using the triple dimple rubber pads. Even without a passenger, let alone several, or anything heavy in the trunk, the car is too low.
I have reverted to stock springs with single dimple pads, and will now cut off a small part of the spring to compare on another car.
 
Glad to hear you stayed stock so I can cross progressive springs off my ToDo list.
 
i don't want to cross progressive springs off my list. just perhaps the W+N progressives. i do think that a lighter compressive strength set of progressives will allow for a supple ride in a straight line, and significantly tighten up for the twisties.
 
I'm about to replace all rubbers bushes, mounts etc, and dampers front and rear, and was hoping to fit the progressive rate springs while everything is out. I'm looking for the characteristics you describe rsporsche, having experienced exactly that in an e21 323i with Bilstein dampers / p.r. springs many years ago. I guess I'll stick with the 40 year old springs for now and keep looking.
 
This may be a dumb question, but, with progressive springs which way up should they be fitted?
Should the tighter coils be up or down?
 
My naive thinking is that it does not matter, the spring behavior should be the same, namely the soft part compresses first mostly.
 
Just got out from under the car, and the rear springs are still factory spec free length after 42 years and 100k miles. The wheel arch to axle centre measurement was Front- l 37mm r 36, Rear- l 34 r 33 with too much negative camber at the rear. I guess the new Bilsteins will lift it a bit. Thanks for the link to imperformance, shame about the rears. I had a chat with King springs here, and while they don't have anything for e9, and won't make one off p/r if I give them the relevent data, they may have something that suits from another car type, a bit of a long shot, but if it pans out I'll post the result. At the moment, I'm going to put the originals back in and see how it feels. I've only just bought the car and have only driven it for a couple of hours.
 
Ian, I have a set of King springs that I'll be fitting to my car. I'll have a look in the morning and let you know the model numbers that they supplied me.
 
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