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Originally Posted by GDT
Hey guys.
The force applied by the brake pad to the rotor equals the force generated by pressing the brake pedal and the booster....there would be some torque effect with different diameter rotors.
But for a specific size rotor the number of pistons or the contact area of the pads has no bearing on the total force applied...
ie a single piston =100% force applied, 2 pistons = 50% force applied by each, etc.
Question, if the above is correct, then why do multipot brakes work so well even in day to day driving?
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I'm no mechanic, but I think this bit is wrong.
The force you apply to the pedal is a small fraction of the force thats applied to the rotor via the pads.
The 'booster' does that I'm assuming, as well as a series of levers that translate 1.5-2 inches of pedal movement to the less than a mm of pad movement (seeing as often pads remain in light contact with the rotors all the time it could even be less than a mm).
I will have a shot at the multi pot question. They are there to handle higher pressures. This is better used by spreading the pressure over a larger contact patch to reduce wear and lower heat.
If you applied the same pressure to a single pot brake it would kill the smaller pad in no time and cause more heat build up.
I may be right... but probably not. I dropped out of yr 11 Physics after we stopped dropping tennis balls and ping pong balls from the verandah
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