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Hi all

I have decided to change my suspention over from a JIC coilover kit to a Bilstein and spring combo . My only problem is what springs to use - Eibach or Kings . The spring rates are about the same the only BIG differnace is that the Kings are liner at the front and progressive at the rear . The Eibach springs are liner all round . I like the concpet of the progressive springs for ride comfort but at the same time a little uneasy by the induced body roll of the top soft springs until enough pressure is put on the spring and the hard spring is hit . Going into a corner you never know what your going to get - the soft or the hard . also the car is Street only

would love hear of peoples view or experiences with either of the two springs

thanks

Edited by buzzboy
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if its a street only car then honestly your not going to notice any difference between the eibach's or kings.

Most people dont tune suspension with progressive rate springs properly which is why they are unpredictable.

If you select the spring and shock properly when the car enters the corner and weight is put into the spring the progressive section of the spring should be compressed and using the higher rate.

If you have the wrong spring you will end up 3/4 (just an example) into the lower rates travel at entry and reaching the higher rate at midcorner (if you have the grip) then coming back to the lower rate at the exit. This does become unpredicatable.

Saying that if you are pushing hard enough on the street to worry about what the spring is going to do entering a corner you should be on the circuit instead.....

Nothing worng with a progressive rate spring, I dont persoanlly like using them for anything other than a comfortable road car though, they have many adavantages and disadvantages which are far behond a road car, they do however have a valid place in road cars for ride comfort.

If it matters id take eibachs or QA1 springs over kings any and every day.

the king springs are only progressive to keep the springs captive

I had a set of king springs before, with the weight of the car, the progressive section of the spring should close up, like helper springs, therefore the effective rate is still the higher rate

  • 3 weeks later...

Ive got Bilsteins with Kings and they are perfect. You cant feel any transition between soft and hard as you explained so dont worry about that haha.

The only difference is that the car is nice and smooth when daily and then handles real nicely once pushed through corners.

Go the kings if daily and they perfectly fine to be used on track too

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