[Morris]

Volumn = Surface Area X Stroke

Volumn = Pie/4 X (Cyl) Sq'd X Stroke

Volumn = 3.14/4 X (.750)SQ'd X 1"

This is for a 3/4" Master Cyl moving 1" stroke...

Then take this volumn and compare it to changes you make to the master cyl or stroke in the calculation ....

Hope this helps

Morris