Half of the weight savings is unsprung weight and it is weight off the front of the car helping make the front to weight bias better.
Suspensions work better the stiffer the chassis, lighter the suspension, better valved or course, better rates to meet the use of the car....it all adds up!
I have saved around 50 lbs or more with the BBK, 15x9 track wheels, lighter tires, and BC coilovers, just on the front of the car, that is HUGE!
I am going to have to hook up with Razor at the tracks in CA so we can check out each others cars, run together, etc...great fun would be the story of the day