On my 65 Falcon V-8 car I replaced the front 10" drum with Wilwood 4 piston disc and have Ford 11"x 2"?? with 1-1/16" wheel cylinders and no proportioning valve. I figured if I needed one I would install it then. I replaced the original mc with a 15/16" piston dual mc. First time down the drag strip I applied same pedal pressure as I normally would and it stopped so quickly I could have taken the short/first return cutout
![Smile :)](./images/smilies/icon_smile.gif)
so I let off and coasted to normal return cutout and gently applied enough pressure to turn.
True, the car was a manual mc to begin with and didn't have to mess with pedal ratio, thankfully!
I am just posting my experiences. I don't remember pressure needed. I usually used 300 lbs on linelocked rear wheels to stage from prestage with my stick car, enough to keep from rolling when I revved to 8,000 or better.
Dale C.