The Normal force will depend on both the bank angle and the speed of the car. For example, the faster you go, the more the car will press down into the road. The Normal Force is the road's reaction back against the car. By the same token, the frictional force will adjust with the Normal Force. However, the Frictional Force will always be less than or equal to the static Frictional Force. Thus, you will occasionally see the Frictional Force remain fixed in size even though N is increasing.