The Ford Barn - View Single Post - Dual chamber master cylinder for drum brakes

frnkeore · 03-12-2021, 01:35 AM

Regarding the PB MC, the main difference, is in the diameter of the piston. On most Ford's, up until at least '70, the non PB unit, had a 1" piston, the PB, had 7/8".

The smaller piston, will give you higher pressure, to the wheel cylinders but, with a little more brake pedal travel.

03-12-2021, 01:35 AM	#7
frnkeore Senior Member Join Date: Jul 2019 Location: Southern Oregon Posts: 783	Re: Dual chamber master cylinder for drum brakes Regarding the PB MC, the main difference, is in the diameter of the piston. On most Ford's, up until at least '70, the non PB unit, had a 1" piston, the PB, had 7/8". The smaller piston, will give you higher pressure, to the wheel cylinders but, with a little more brake pedal travel. __________________ Frank '35 Ford Model 51 '48 Ford F3 '54 Ford Tudor Mainline