If you want to reduce friction inside a shock absorber, you have to make a compromise. To lower the friction you can shorten the guidings, and use softer material for the dust/oilseals. This will ware out the parts much quicker, so the shockabsorbers have to be serviced more frequent.
And for...
Hi guys,
I'm from holland, and i've done a project on ambulances. We wanted to improve the roadholding capacity of the car without too much loss of comfort.
We also did the spring frequency test, get the car in bounce ( we call it "cadans" i don't know if its the same in english)...