Do the math; with a 1 1/32" MC, 6-1 pedal ratio and 100 lbs. leg pressure your line pressure should be 716 psi.

http://www.wallaceracing.com/brake-master-cyl-calc1.php

In your case, the unknown factors are pedal ratio and leg pressure. "Surprise stop" leg pressure will vary with the individual, bathroom scales between your foot and the pedal will give you a number to compute from.