I go with the Zeals, both HKS and KW are way too soft for the track. Maybe even the Tein mono flex is a good option.

 

G35sedan, I am not buying your point on Hysteresis. With the V1 and V2's maybe... but the V3 is unique. Whats the one way to adjust the rebound force? It's going to have to have a way to adjust the gas charge pressure. Which means in the resevoir housing on the outside of the V3 is a piston that seperates the gas charge just like the floating piston in a monotube design does. In that respect the dampening fluid and the gas charge wont cavitate unless a seal goes just like in a monotube.

Now does this make the V3 suffer the same non linear characteristics that monotubes have in low velocity dampening and rebound? Maybe someone who has used the KW V3 can chime in if they had any bounce during low speed bumps.

As for the progressive spring rate, for the average driver it may in fact be an advantage. The average weekend racer isnt going to come with multiple linear springs to match whatever road or course condition he/she will encounter. A smooth course will of course be used to the full advantage by a stiff spring rate, what about the parking lot or taxiway that most autoX courses are based on? Smooth surface with intermittant bumps and varying surface conditions which would at some points be better suited to a softer spring rate and some at a higher spring rate. Progressive spring rates give a greater margin of use and can often cope with these varying surface conditions. Also let it be noted that the difference in front and rear spring rates on the V3 could also be a factor in loading the rear wheels which in turn reduces wheel spin and increases traction in RWD cars.

Cheers!