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Old 07-08-2020, 10:58 PM   #309
Var
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Join Date: Feb 2017
Drives: 2017 Subaru BRZ PP
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Quote:
Originally Posted by timurrrr View Post
Isn't that the whole point of RC kits? To have near-stock control arm angles while still reducing the ride height.

If you have a damper length designed for lowering with stock arms and then use it with an RC kit, you get double the lowering. You need to actually make the damper longer to work with an RC kit to get the optimal control arm angles.
Are you talking about just a roll center kit or a drop spindle kit? Those are 2 completely different things. A roll center kit does not lower the car. It only compensates for control arm angle at a given ride height. It's basically just a taller ball joint. A drop spindle kit places the spindles higher up on the upright, which moves the wheel mounting point upward, thus lowering the car without affecting geometry.

If you are talking about a drop spindle kit, the dampers designed for factory arms, at least in my case with the CSG FLA, were tall enough to get the control arms parallel. This is with the bodies fully extended but leaving enough threads in the lower mount for safety. With the shock bodies fully extended, and with control arms at or close to optimum geometry, the car sits very low. If you purchased a taller lower mount to raise the car up an inch for example, your parallel control arms would no longer be parallel. They would now be facing down on the outsides.

This is effectively the same thing that happens to 4x4 vehicles when they are lifted without correcting geometry

Last edited by Var; 07-08-2020 at 11:25 PM.
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