[Mgs] MGB rear brakes

[Paul Hunt]

Fluid is really only displaced when the shoes are taking up the slack, and you
aren't developing any pressure then, and there is no braking.  It is only when
all the slack has been taken up that you start to develop pressure, and it is
only then that the brake will start to slow down the car.  The more slack you
have the more fluid will need to be displaced, like when the rear shoes need
adjustment, and the pedal will go down further before you start to get any
braking.  It's true that a larger cylinder will need more fluid to be
displaced to take up a given amount of slack, but that is nothing to do with
retardation or braking force.  When all the slack has been taken up and you
start to develop pressure and cause retardation, that is when a larger
cylinder will generate more retardation with a given pedal pressure.

PaulH.
  ----- Original Message -----


  OK Simon but he's right about the movement being less in a larger
  cylinder, with the same amount of fluid displaced by the master.