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It looks like it does matter. Changing the height of the strut changes the suspension geometry. Intuitively, there must be a proper height for the strut, and the ride height set with spring preload.

I don't lower the car for competition, but since we're on that subject, with a strut like the RideTech, where you can adjust ride height independent of pre-load, what is the correct way to set the ride height? Do you set the pre-loads the same and adjust the height of the strut? Or do you set...

Brian, thank you.

Brian, I'm not an engineer, so I have no idea how to draw a free-body diagram. :) I do see that there is no spring rate variable in the equation, but it's hard for me to understand how the springs have no affect. That is, if I replaced the springs with a solid rod, would the car stop in the...

It feels like I'm hitting the stops, and I'm not convinced I'm not getting into them, but now I'm wondering if I could just be overloading the front tires without getting into the stops. I see spring rate isn't taken into account for calculating the weight transfer. Help me understand why a...

Brian - Thanks for the quick reply. The CG height was a typo. The CG height I estimate to be 20 inches. The unsprung weights are per corner. My front corner weights are: LF: 1095, RF: 1048 Tim, the spring rate is 325 lb/in. with ~ 0.5" of preload. My calculations were as follows for the...

Hello, I'm having a little trouble with a car I'm trying to setup for autocross. The issue is, I'm getting into the bump stops under braking which is hurting my braking performance. I think I've even hit the stops on hard cornering as well. Vehicle Specs: Total weight 3970 pounds (all fluids &...