ok im going with non power disc brakes in the front, any suggestions on what master cylinder to use? i dont think my drum brake master cylinder is gonna do the trick?
this is the one i'm using...also kept it with my ...rear disc. brakes...using stock porp. valve... ......
I bought a brand new 77 Mav non-power disc brake master cylinder from (I think) Advance Auto Parts for somewhere around $30. The brake pedal will ride high if you don't shorten the pushrod. I would also get a later combination valve that is suited to disc brakes. The earlier one keeps 10 psi of drag on drum brakes, later ones only keep 2 psi of line pressure on disc brakes. I went to a Wilwood adjustable prop valve, but having done that, it seems like overkill. A factory combo valve would probably be fine.
What do you base this on? I have heard this before and have never been able to verify it. I have taken apart a proportioning valve and there are no check valves to maintain any pressure. Considering the total square inches of drum brakes, that would be a lot of static pressure.
I did the front manual disc conversion and used a 74 Maverick MS and my pedal does ride about 1 1/2" higher than my clutch pedal. I've gotten used to it, but it'd be nice to fix it. If I wanted to shorten it I guess I'd have to cut the end attached to the MS... When I grabbed the Granada spindles I got its prop valve too and I haven't had any stopping issues, the back tires just barely break loose under really hard braking so I think the distribution is right.
I bought an adjustable M/C pushrod so I could make my clutch and brake pedals the exact same height ...