Technical Braking Theory/real application

That is correct about the hydraulic pressure being equal.

On a tandem master cylinder , it has 2 springs to return the pistons. The heavier spring goes in deepest.
It needs to be strong enough to overcome the resistance of 2 pistons.
The lightweight spring only returns the pedal operated piston, but to do this it needs to be seated against the floating piston [which is supported by the heavier spring]
If the springs were the wrong way round the floating piston wouldn't return correctly, because the heavy spring would try to push in 2 directions.

The so-called different timing of the brakes [if this actually exists] is purely free play at the other end.
Brakes require clamping pressure to create brake torque, this does not happen until all 4 corners have taken up the free play

 

thanks for your input.