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there are so many variables in the brake system performance equation, that looking at calipers is moot: my order
tires
driver
pad compound
pedal/master cylinder/system hydraulic balance control systems, abs, etc.
rotor diameter
calipers
rotor dia is critical...look at an M3 vs a 997...huge difference
why so important?
brake torque is the stopping force, T = r F
r = rotor radius, F = brake force or hydraulic pressure x piston area = pad area x piston pressure
now if r is bigger, F is smaller for a given T...still with me?
now friction = Ff = u F...see, if F is smaller, so is friction force for the same stopping power (brake torque)...if friction force is smaller, so is the heat density...
and it makes sense, the path/area around the rotor is larger...
it makes no sense to look at 1 component in a complex system...
there's a quote floating around by the chief engineer on the GT-R project...that calipers are moot, it's rotor diameter that makes the difference...and they are huge on the GT-R, 4 x 15"
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