Foxy

I need to better understand what you're referring to, is it roll center you mean or something else? Roll center adjusts how easily your car will try to bank toward the pull of gravity, it can aid traction when there isn't much available, but to be effective you would probably adjust other parts of the suspension first. Roll center isn't something you'd normally adjust unless rethinking your geometry approach altogether and making a large number of changes, for example when changing roll center you would almost certainly want to adjust shock angle and droop as well.

What effect are you trying to achieve exactly?