Unsprung weight on a car is horrible for performance because for every additional pound of unsprung weight a car has, that corresponds to an equivelant gain of 3 pounds (or is it 6?) of normal, sprung weight. So even though I know that, why is that the case? It seems to me that the motor has to move the mass of the car regardless of where that mass is located. I guess it could mess with the handling more than sprung weight but I was under the impression it affected acceleration and top speed as well.
Why?
Why?