I though if I increased bore size of clutch master cylinder, it would increase stroke of slave. I installed 1" bore master and clutch became totally inoperable (didn't work). Pushed so hard on pedal it blew out seal on slave. Went to web site www.hotrodheaven.com/tech/brakes and found interesting math. 100 lbs applied to pedal (6:1 ratio which most wilwood pedal are) with 3/4" master will produce 1359 psi. 100 lbs on 1" master will produce 764 psi. So I put back on my old 3/4" bore master and it worked. Average person can push 120 lbs with foot.
bob