Originally Posted by simonella_virus
from my reading, it looks like the OE STi struts are overdamped. so on that note: is there some quantitative measure of the damper fluid viscosity/ valve cross-sectional area (i.e. overall damping characteristics) so that one can compare one strut against another? sort of akin to spring rates.
There are shock dyno plots, but the only struts you'll find them for are Koni and Feal.
Consequently, these are also some of the highest regarded strut replacements in terms of comfort + performance.
If you find the Feal thread on development of the re-valve, they have dyno plots of the STi struts and Feal struts showing how they are different. Takes some time to figure out how to read a shock dyno if you never have. It's not totally obvious.