Quote:
Originally Posted by jamal
When you have a helper spring and change ride height you're not changing preload.
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Helper springs are not there to aid in ride height adjustments.
There is a difference between between Assist and Helper springs.
Helper springs typically have a very low spring rate, which will collapse when the car is at its static state.
Cars used primarily for motorsports will benefit from these due to increased rebound stroke.
Assist springs usually have a higher spring rate, and can be found in both progressive and linear rates.
The dampers are threaded so that ride height can be adjusted without sacrificing piston stroke, and so that you have more range of adjustment.
Hope that helps.