Re: Mustang 5.0 Stocker brake pressure
 

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.

Re: Mustang 5.0 Stocker brake pressure
 

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?

Re: Mustang 5.0 Stocker brake pressure
 

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?

Re: Mustang 5.0 Stocker brake pressure
 

I am embarrased to say that I have spent the better part of 6 years trying to sort out brake problems on my 3rd Gen Camaro. I started with stock front discs, Wilwood rear discs, and a manual master cylinder from an early 90's S10 pick-up. This didnt work. I then went to Wilwood front discs and a Wilwood master cylinder. I figured since all the components were compatible, I would be all set. Wrong! I then went back to stock front discs, with the Wilwood rear discs, and a 1.032 dia. Strange master cylinder. It worked okay, but I still could not hold the car at line line at anything over 2500. The problen turned out to be pedal ratio and firewall flex. Remember that these cars never came with manual brakes, so the pedal ratio is wrong. I only had about a 4.1 ratio. I redrilled a hole on the pedal and now have about 5.5.1. I also added a simple brace to support the master cylinder, as firewall are very flimsy on these later model cars. I will try to upload a picture.

Re: Mustang 5.0 Stocker brake pressure
 

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

Re: Mustang 5.0 Stocker brake pressure
 

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.

Re: Mustang 5.0 Stocker brake pressure
 

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.

Re: Mustang 5.0 Stocker brake pressure
 

Bobby, I think your dad has my caliper pressure gauge (plus my valve spring tester for that matter - lol ) - have you checked pressure?

Re: Mustang 5.0 Stocker brake pressure
 

Redrill your brake pedal so your pedal ratio is 5:1 put a .750 MC on it and you'll have right at 10000lbs. Brake line pressure

Re: Mustang 5.0 Stocker brake pressure
 

My master cylinder support. Once I had the pedal ratio squared away, the firewall was not happy with the new found pedal pressure. Hey even the COPO's need a master cylinder brace.