Camber is the degrees of rotation your wheels are at relative to the ground, rotating away from the sides of the car. If the bottoms of your tires are sitting perfectly parallel with the pavement, then they are set at 0 degrees camber. As the tops of the wheels fold in, the camber changes. In that case your wheels would have negative camber, -3 degrees or something like that. If the bottoms went in you'd have positive. When most suspension systems compress, the further they compress the more negative camber is attained. Since on the rear of the supra there is no easy way to adjust the wheels camber, if you lower your car or have saggy springs, you get lots of negative camber. Good for extreme handling but it hurts straightline traction, brake effectivness (again less usuable tire on the pavement) and the insides of your tires wear funny.