Math for determining needed brake size

[Apogee]

Vacuum assist is going to require vacuum...do you have that with your HP numbers?

As for running the numbers, it's mostly a function of the kinetic energy (KE) that your brakes may potentially need to dissipate. KE = (1/2)mv^2 where m = mass and v = velocity. While mass certainly plays a roll in the equation, velocity tends to be the controlling variable given that it is squared. Regardless of how much HP you have, the level of braking capacity that your car requires is a function of the how the car is to be driven. Given 750 RWHP, pushed to the limits, you'll need every bit of brake you can afford and possibly then some if you've got the tires to handle that much power. If you only cruise it to the grocery store, then it's a different story. Calculations only get you so far, at some point you need to actually test the brakes in the envinronment they're being used, so looking at other applications given their weights and speed potentials can tell you a lot about what works and what doesn't.

Tobin
KORE3