Dual Master Cylinder

[chapingo17]

On a previous post someone mentioned that a 57 Ford master cylinder could be upgraded to a 1968 dual master cylinder. My question is does the bake pedal rod would need any modifications? or just remove and install new?

[Marc]

On the 1957 ford forum on evil facebook someone posted a brief how-to using a raybestos MC36222 dual master cylinder. Uses the stock pushrod, and no need for a proportioning valve if you are still using drums all around. Just bolt it in and re-plumb the lines from the MC to the splitter on the frame. That master cylinder fits a '67 - '72 Ford Custom 500.

[chapingo17]

Thank you

[chapingo17]

I just installed dual master cylinder and bleed out post install. I notice pedal sit a little bit lower than before would that be because of the dual chambers?

[Gene]

On the 1957 ford forum on evil facebook someone posted a brief how-to using a raybestos MC36222 dual master cylinder. Uses the stock pushrod, and no need for a proportioning valve if you are still using drums all around. Just bolt it in and re-plumb the lines from the MC to the splitter on the frame. That master cylinder fits a '67 - '72 Ford Custom 500.

The brake light switch seems to be an issue with this master cylinder though.

[Edd505]

I just put in a booster with a two cylinder master cylinder, drum drum no disc.  Now to plumb the system from a single line down to both front and rear, I was told no proportioning valve needed with out disc. How do I plum this system? 

[lalessi2]

I have a Tee on the frame rail in front of the master. I used it for the front brakes. The rear line goes to the junction  block on the rear axle for the back brakes. I didn't use a hydraulic brake light, I have a contact switch on the brake pedal.

Lynn

[gasman826]

If using a brake light pressure switch, plumb it into the front brakes.  Under light brake pressure, the front brake pressure activates before the rears.