Originally posted by psycho
izzyracer
You're on the right track, but it's actually a lot simpler than that. The collars on the threaded body shocks do exactly the same thing as preload spacers on the older or lower end cars. They are used to adjust the ride height of the car. In order to have the car handle right, you need to make sure the car is balanced correctly and you end up doing fine adjustments to adjust the "tweak" on the car too, but the main purpose is ride height adjustment.
Psycho! haha that's a classic but great name! scary! anyway, you are right they are also use to adjust ride height. But if you use it that way you also affect spring tension thus can create other issues. A good way to adjust ride height is by using spacers (plastic or rubber) inside the shock cylinder during assembly to make your shocks shorter depending on the length of your spacers which will dictate your ride height.
In other words this thing can create a lot of affects both bad and good when use properly or improperly. OH MY gOD!