So I have H&R street perf coilovers. I am tired of the progressive rate characteristics. I'm wondering if anyone has fitted linear springs to their coilover setup. I am calling H&R to ask about their 2.5 I.D. springs. I suppose I should just buy a linear coilover setup and skip the hybrid method. Wonder how this thread will turn out LOL
As the owner of KW V3s I can tell you that swapping out spring rates is common practice and yet another way to tune a car for optimal handling. There are many springs available for the KW set ups. What comes with it are optimal for aggressive street usage/ occaisonal track usage.
The reason for linear springs is so that the spring rate remains consistent throughout compression, and is therefore more predictable. Progressive springs on the other hand increase stiffness as they compress and can often lead to "unpredictable" handling behavior. (the car can suddenly understeer or oversteer based on compression) These springs also go from soft to hard in a hurry on a bump, whereas the linear springs will have consistent hardness throughout the "bump."
...that said, some drivers prefer the progressive springs because the more body roll in a turn, the more "push" the spring gives back. So progressive springs can be very useful for drivers who are expecting the extra resistance. But they are not as comfortable on the street.
"as" comfortable. The KW V3's are VERY adjustable right out of the box, and even with the yellow springs that come with set, you can create a very capable handling car. But the big boys play with different springs and spring rates on the car. Given that the V3s can be as agressive as you want, or need them to be. I've had a ton of luck with mine, and would never take them off my sports car.
Tom, I don't know how the H&R is, but I feel like with my PSS10s, which have the same springs for all Mk5 chassis, the softer end of the progressive spring is all used up with static weight on the 3.2 + quattro. Any bump is already in the stiff zone. They feel great on the track though. So I'm interested in finding a linear spring that can split the difference. Comfortable enough for daily driving, but still capable for track days.