[Matra et Alpine]

Originally Posted by johnnyperl

dont have specific answers but i would say that on a typical car it would play a small part since the other components are so poor (sidewalls, ARB).
the setups ive seen use a 4cm(?) bushing fit inside the swingarm pivot with the mount passing through the center of the bushing.

yeah that's typical jp.

replacing a metalistic bush with a poly one makes a HUGE difference in handling only matched by the change up to rose-jointed.

I'd NOT underestimate how much poor handling comes from movement in the bushes. A 1mm deflection under load in a corner can alter the camber/caster by up to a 5 degrees THAT doenst' make for a car easy to drive on the limit.

The "other" components don't have such a large effect - except the tyre itself which we're kind of stuck with anyway BUT the vector forces on the vette spring woudlnt affect geomotry at all so that's not the major issue. BUT it WILL affect the impact of mid corner bumps and undulations.