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GREAT THREAD!!!!

I have 64 B-Body with SSBC-A156 Disc Brakes and poor braking performance with a hard pedal feel.
Specs:
Rotor Diameter: 11,25
4 Pistons each 43 (mm I guess) = 1,69' x 2 = 2,39 for the calculator
Master Cylinder bore: 1 1/32 = 1,03'
Pedal Ratio not measured, taken 7' from the file

With the specs I have calculator shows torque 3100 and pad movement 0,0047. When I change to a 15/16 MC torque raises to 3824 but pad movement just 0,0039.

If I change the brake pedal move from 5 to 6 inches due to other stroke pad movement goes up to 0,0047.

So I might improve braking torque about 20% with a 15/16 Master Cylinder. I was thinking of buying a 1975/1976 A-Body master but they are all power units. Any other 15/16 Master recommendations?

Many thanx in advance

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