Could we try to unit all info about susp kit in one thread?

First question is spring rate.

I will start with D2, their street kit for Coupe has F:7.5kg/mm, R:4.5kg/mm.

What about GAZ, KW2, Eibach and other?

Misha - why do you need spring rates ?
AFAIN Eibach wont tell rates.
Regarding GAZ you can order any spring rate , dont know about KW'S.

That's what I found about the Gaz kit spring rates:

track:
front 600 lb
rear 525 lb

standard:
front 425 lb
rear 375 lb

...in my club, we are using springs from 150 N/mm up to 300 N/mm, depending on track/slalom and weight of the car...

Eibach gave me 20vt spring rates:

Front progressive - 13-22N/mm
Rear progressive - 25-53N/mm

i got FK's

the fronts have a main spring and a support spring, and the rear are progressive,

all i know is i have a set of 80nm and 100nm main springs, and 110nm springs are availabe.

Ninja

I have been looking at XYZ Coilovers.

Super Sport chassis
Spring size 2.5”
Front 80N/mm
Rear 40N/mm

Adjustable dampers both front and rear. Bound/rebound ratio is 1:2.
Front topmount is uniball with camber adjustment.
Rear has standard mount.

Does anyone know the std 20vt spring rates?

Can we also add the following:

- Standard Spring height
- 3rd party Spring height
- Spring hardness i.e. how crashy does it make the ride?

I don't believe those Eibach spring rates, that'd make them much softer than standard springs, which they definitely aren't!

I would like to get this going again and find out the std rates.

So would someone with standard suspension be kind enough to measure the height of there springs with the weight of the car on them.

And someone with std springs off the car measure the free length.

Are the front springs progressive? from what I remember they are evenly spaced coils?

This would be interesting for me so I would appreciate peoples help