I am trying to finish this 35 ford. amost everything is done running gear etc. need paint,interia and brakes. Its a 351W, 6speed, 9"rear. My question is about the brakes. The front is a dropped straight axle ( orig. type ) with wilwood disc. The rears a 11" X 2 1/4 drum ( 70s truck type ) I was going to run a small brake booster and dual master cylinder. But after checking the engines only putting out like 10 lb. of vac. Not enought Thinking I neef at least 15.
So anyway a non powered should be ok. Just mount the master cylinder run a rod to the swing pedal, bleed it and thats it. Thinking bleed & adjusted correct it should stop on a dime. With change left over,lol ! But here is my question. I have heard from several people even the local parts guy. The all say diffrent things. Some say that I should run a large dual master cylinder, like 1 1/4 piston or larger. Other say go with a lot smaller, less the 1 inch. Because it will produce more line pressure. What do you guys think. Bigger or smaller piston ?? Like what dia. pistion ? Also I am thinking all ford brake lines mount to the mastercylinder. With the rear brake lines next to the master cylinder mounting bolts and near the piston,with the front line mounted further away. Not near its mounting holes. THANKS GUYS

 

Check with Wilwood to be sure, main thing is you want to get the correct MC for disc/drum setup...since you're running thier front brakes, they should have no issue helping you out.

You should be able to stop just fine (with w/o booster), albeit with a bit more foot pressure...if you later decide to upgrade to power and add a booter, DO NOT run the dual diaphram ones, they are just too darn touchy in a light truck like you have (IMO), just a 7-inch single diaphram will be all that's needed and still give very good pedal "feel".

Personally (which is what I'm doing in my '36) is mount the MC/booster under the floor, I'm using a '93 Cougar MC, but changing to a 7inch (6 if I can find it) booster, there's plenty of room for me underneeath since my cab isn't channeled, only difference is the brackets I fabbed are not swing pedals from the top, but swing from the bottom through the floor, so I do have a slot, but will just put rubber on each side to keep the wind out.

 

Thanks Mike for the quick reply !

 

Take a look at a factory setup for a dual reservoir and you will see that the front lines are plumbed to the rear of the MC and the rear brakes are plumbed to the front of the MC. As I understand it the reason is that the fluid is forced through the front of the MC slightly before the rear due to the position of the ports in the MC. The effect is that the rear brakes start to grab just before the front in order to keep the vehicle going in a straignt line. If the front brakes grabbed first the momentum of the vehicle would tend to cause the rear to try to overtake the front possibly causing it to go into a skid. Steve