[wilf leek]

The above presupposes that the caliper pistons are the same front and rear. Front and rear master cylinder bores are different for two reasons; 1, to give a forward bias to the brakes (fronts should always lock before rears), and 2, to allow for the fact that the caliper piston arrangement/size is often different front/rear. e.g. 4 or 6 pistons on the front, 2 or 4 on the rear. And this does not allow for the fact that the piston areas may be different as well.
In that case, a higher volume of fluid needs to be moved to the front calipers to give the same piston displacement.

In the case of the original question, there was obviously a fault/blockage leading to a total lack of braking effort at the front. I hope that is sorted by now.

However, the issue of which master cylinder should operate the front brakes is more complex. I can't believe that the brake supplier would specify it wrongly?

Can anyone authoritatively tell me what the brake caliper configuration is on this car front vs rear?

Oh -and as to the question of the womans foot pressure, the answer is, assuming she is standing 100% vertically - the same total on each foot, but a different lb/sq in for each. Does that help any of us?????