Quote:
Originally Posted by Norm Peterson
What you first need to know is that high and low speeds refer to the speed of the piston inside the shock as the sprung mass - car body - moves around due to acceleration, braking, and cornering (this being "low speed"), and as the suspension reacts to hitting bumps (high speed).
You want enough low speed damping for control of sprung and unsprung mass motions without driving the high speed damping so high that the integrity of your fillings is at risk. Apparently DSSV is more capable than other approaches to shock design as far as providing firm chassis control without feeling like they're filled with cement when you hit a stretch of rough road (IOW, harsh).
This tuning is an ability to separate body control from ride quality - consider it a different way of tweaking the shock's damping curve, all done internally and without driver or other external input.
Just like with most other shocks, tuning those four different regions at the shock design level is via internal valving rather than as an end-user adjustment.
External adjustment capability such as what you find on coilovers and Koni Sport shocks allow you to manually shift all or parts of the damping curve. The more separate adjustments you have, the easier it is to get "lost" in your tuning efforts and end up worse off than if you'd left them all alone.
In the attached .jpg, "low speed" is to the left of the vertical red line. It's about where consensus divides low from high, good enough for illustration here anyway. Below the black line is "bump", rebound is above. The greenish line is what the damping could look like if no attempt at all was made at softening bump harshness. Since I rather like my fillings to stay in my teeth, I really wouldn't want to see a 10 inch/sec bump on this line at all (about 0.25 in meters/sec on the plot), even though the low speed bump damping is marginally poorer than the other settings.
Norm
|
Thanks for the lesson Norm , I had to read it twice to "get it"
I had thought they meant speed of the car
Always good to learn something everyday
