It seems a bizarre combination, but I fitted Spax PSX adjustable dampers to my C2 VTS (which already has Eibach Sportlines fitted).
What can I say? Night and day compared to standard dampers... I've currently got them set on 20 out of 28, and the car feels butt-clenchingly stiff! My splitter used to scrape on a particularly large speed bump in town (due to the spring compressing), and now it doesn't.
Braking is one hell of a lot better too - much less dive, and the car just gets on with stopping (a welcome change).
The rear feels like it's following the front a lot better... as opposed to it's previous sluggish response on standard dampers.
I played with the standard dampers and they don't appear to have 'pyramid' damping. They appear to have a very linear setting... so damping doesn't feel any stiffer the further they are compressed.
One rear damper felt stiffer than the other (LHS felt a bit soft)... but there was absolutely no sign of leakage/damage. I guess my conclusion is that they're utterly cr@p.
I also played with the Spax dampers (to check) and they do get stiffer as you compress them more. Obviously I did all of this by squeezing them, therefore it's not a scientific test, but that's how it 'felt'.
I fitted new top mounts whilst I was at it - I'm glad I did, because one of them had come apart. The other felt very rough. This is on a 26 month old car, with 35k on the clock.
The rear is a bit noisy/rattly now... I believe it's the scissor-jack located in the spare wheel, but I'll check the dampers tomorrow just in case.
Here's to happy trackdays in 2010.
PS IT TOOK 8 BLOODY HOURS TO DO IT, due to the rears being seized on the lower bolts, and the front passenger side being seized on the hub.