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I believe the Crosley master cylinder is a 1” bore.
The calculation of system pressure sounds about right. Rough eyeballing of the pedal leverage is about 5:1. Figure your brake foot applies about 50 lbs of force; you’d be getting 250 lbs of force coming into the master cylinder. Divide by the area of the master cylinder piston (sorry; I don’t know the bore size). If it’s a 1.5” bore (just a guess) that would be 1.8 square inches. 250/1.8= 141 psi.
On Jul 27, 2020, at 8:36 PM, Jim Bollman <Jim@...> wrote:
Thanks Butch, I knew that, just forgot.
While the original rears were 7/8", all of the replacements, for
many years have been 3/4", as far as I know.
I do know, that all of the ones that we sol, were 3/4".
On 7/27/2020 8:12 PM, Jim Bollman
If you are working with new wheel cylinders did you put the right
Wheel Cyl - 1??? front 7/8??? rear
If they are not new/rebuilt that would be a good
place to start looking, could be a stuck cylinder.