Master cylinder pressure question..

[Eman]

Other discussion about MC's and the mention of a MC with 60/40 bias.
Someone explain to me how the MC can have 60/40 bias when the bore in the MC is the same size for both pistons/ports.
I know GM used some step bore MC's where the pistons are different sizes for each port which makes sense using hydraulic principles where the same pressure is applied to 2 different size pistons results in different pressure out of the ports.

[pmrphil]

The positioning of the "cups" are staggered, which changes the timing of the application of pressure

[Eman]

Originally Posted by pmrphil

The positioning of the "cups" are staggered, which changes the timing of the application of pressure

Might delay application but it sounds like many think the pressures are different, including the tech guy at the company that sells them.

[pmrphil]

They will be different, due to the compression on one side versus the other - start compressing later would result in lower pressure.

[1320racer]

Pressure can only be increased by changing the pedal ratio or by decreasing the master cylinder bore.

[James Packer]

The bias is likely volume not pressure.