[kent olsen]

As Bill says great big brakes that lock up the tires are counter productive. Big brakes need big wheels/tires to handle a heavy car. And then a 50% increase in braking ability might be 3-4 inches in sweep area, while going from a tire with 6 inches of tread width to 9 inches adds another 3 inches of contact and seems like a balance. Then consider the brake is squeezing the caliper but with out some down force from the car at the now higher speed nothing squeezes that extra 3 inches of tire to the roads surface.

If you add power to your heavy car then your braking speed may be higher and larger brakes would seem logical. Next you'll run into brake fade so changing to drilled and or slotted disc's would be next.

If you are a track junky then the big brakes and wheels/tires are cool. On the other hand without 500 hp the Porsche is a momentum car, mine is a 72 and the idea is to keep as much speed as you can.

After 20 years of playing with my 72 and lot's of track days, east and west coast, this is my combination. Weight reduction (now 2200lbs), 245 hp at crank 9:1 pwr/weight), running 205x50 tires on 7" rims. All I've done for brakes is replace the front calipers with SC calipers giving about 20% more in the front, stock rear brakes and drilled and slotted discs.

These are my opinions not to contradict anyone