b15 brakes same as....?

[Pat Griffith]

>it would depend on the thickness of the material, if the
>loss of diameter is less than the increase of the
>circumference X the thickness of the rotor, you gain
>surface area that is air cooled

So you gain surface are that is cooled but you lose surface
area that is making contact with the brake pad.  Air is
cheap -- I could make some brake ducts out of material
from Home Depot if I was really concerned about keeping
rotors cool.  Why compromise the performance of a high-
performance brake pad by swiss-cheesing a rotor?

Pat