Does increasing spring stiffness increase ride height? Or stiffer springs are shorter than the softer ones so the ride height stays the same?

Stationary ride hight is almost identical. However, stiffer springs would logically have shorter travel to be fully compressed.

I believe a good rule of thumb is to consider raising the ride-height when using a softer spring setup. Easier to bottom out on softer springs.

Enis, thanks for the stationary ride height info - that's what I was looking for. But why stiffer springs would have shorter travel?

Jon, yes, that's true, but I believe you should always check things on track, because sometimes you don't have to increase ride height even with softer springs.

For sure yes Dmitry. It was just an example.

Dmitry, I was referring to springs of same length. Stiffer spring of same length would have shorter mechanical travel.

Seems I don't know something about springs, but I don't understand why stiffer springs have shorter travel :/
I thought they have same travel, they're just harder to compress. No?

Usually that means that diameter of wire that spring is made of is thicker, hence shorter travel over same length.

If you're referring to sims where spring length stays constant, my understanding is that stiffer springs means the static weight of the car won't compress them as much, leading to greater ride height. Less static compression means greater remaining compression travel, but of course less remaining droop travel.

MoTeC shows the advanced rtrainer's static ride height increases by about 25mm just from changing springs from their softest to their stiffest.

I would say ride height dosent change due to the fact that
you have that adjustment independent of spring rate.
If you change your spring rate on here, and don't touch
your ride height adjustment, it will stay the same.
Thats a static ride height....Not moving
When out on the track, with equal forces (relative to a
lower rate spring, before you changed them) the dynamic
ride height will be higher if the forces are equal.
If you were bottoming with a soft spring, change to a
higer rate spring without touching ride height, you may
not bottom as much.
Remember all the adjustments being made are adjustments
in a "static" condition.

Ever hear of Bump Steer?
DC