Mustang 5.0 Stocker brake pressure

[Bobby Fazio]

Originally Posted by Fr8teamster

I have a chart somewhere. I just can't remember where I put it. There's actually 2 charts one for a foot brake and one for a hand brake. Chassis shops can tell you. http://www.mpbrakes.com/techtalk/how...ng-pedal-ratio

Thanks for your help. Ok according to the measurement I am at about 4:1 in the pedal ratio. Will adjusting this make up for too large of a master cylinder?

[Fr8teamster]

Yes moving it will change your brake line pressure. Usually a 5:1 pedal ratio equates to 1000lbs of pressure with a .750 MC

[Fr8teamster]

www.wallaceracing.com/brake-master-cyl-calc1.php
The website above let's you calculate pedal ratio, you put in your info and it tells you brake line pressure.

[Fr8teamster]

When you put your info in. It'll ask you your pedal pressure, there are 2 of them, one for your foot and one for a hand brake. It's 150lbs pedal pressure for your foot, and 75 lbs for a hand brake. Ok?

[Fr8teamster]

Remember 1000lbs of brake line pressure is ideal, around 1200lbs under hard braking. When I build brake pedals, I shoot for a 5:1 ratio and a .750 MC works out to 1000lbs. It sounds complicated but its really not. Just shorten the distance from the pivot hole to the pushrod hole. If yours measure 3" and your pedal measures 10" that's your 3:1 ratio. All you have to do is drill a hole1" closer to the pushrod. So the distance is 2" instead of 3" that will change your pedal ratio to 5:1 and you can use a .750 MC. Ok?

[Bobby Fazio]

1.125 master cylinder.. general consensus seems to be pedal ratio so lemme at it!

[Rory McNeil]

Probably getting harder to find now, but when I was building my 85 Mustang, I found a stock 4 banger early Fox Mustang with manual brakes, and removed the factory brake pedal, aluminum master cylinder and mounting plate, along with the longer lines from the master cylinder to the distribution valve, and it has been working great for over 10 years now. I got my manual steering rack the same way.I just let the Ford engineers do the calculations.

[JHeath]

I used a mid 80s Ford Ranger master cylinder, 15/16" ,and a modified brake pedal from Baer ,with a pushrod that is slightly curved. what is nice about the ranger master cylinder, the lines are on the fender side, instead of being in the way.