superstock springs rear clamps?

Trying to learn what clamping or unclamping the rear segment of the superstock springs will do,see lots of try this clamp or unclamp etc but what will it do? If I unclamp the rear will it make the rear rise more,ie more body lift,less body lift,will it hit tire harder/softer will suspension react quicker or slower?or anything else I would be looking for.I understand the clamp the front segment leafs tight just wondering about what happens with the rear.
Thanks