[Gary Gibbs]

My understanding is that F1 uses something like %53-%54 rear weight and would appear to be optimal for their racing. 50/50 makes sense if you are running the same rubber F/R. Certainly acceleration and braking will be better with slightly more rear bias. Accel is better because you have more total weight on driving wheels under accel. Braking is better because you will always have weight transfer to the front (about 400 lbs on a GT40) and will have close to 50/50 under braking utilizing all four wheel, etc.