For the moment I am running no preload. I am playing with the damping at the moment, I seem to have settled for the softest setting on the damping for road use.
From my research (and what I remember of hooks law), on a non-progressive spring (which these are, the Vmaxx had progressive springs), the spring rate is not affected by preload. Adding reload simply increases the amount of weight required to initially compress the spring, once that boundary is overcome, it still behaves in the same way with the same spring rate.
In my case I originally set 8mm of preload, on the front I have 7kg/mm springs, so that was 56kg or preload, meaning that 56kg on each side of the car was being applied directly to the wheels all the time instead of through the spring.
That's all well and good in theory, but I still don't understand what adding preload does to handling in practical terms though lol
