Dusty Dude
Well-Known Member
When my wife and I got our '69 Coronet 500 it was equipped with after market power four wheel disc brakes and they worked as best I recall. I have only driven this car from the transport trailer in front of my home to my rear entry garage. During the rebuild of just about everything drive train related I decided to go back to manual brakes which is what my A-12 car had when we bought it brand new in '69. The engine I have built for the car (496" stroker) is not going to pull enough vacuum to operate power brakes and besides I don't like the clutter of it all in the engine compartment. Other than deleting the power portion of the system the only other change I made was to go to a 15/16" bore master cylinder. It is visually identical to the one I replaced just a smaller bore. It is a four bolt, cast iron unit and I have bench bled it twice. The problem I'm having is no matter what method of bleeding I use other than pressure bleeding the pedal goes to the the floor on the initial stroke and then on the second stroke I have what I would call "normal" pedal travel and feel for manual brakes. A learned friend of mine says I need to install 2lb residual valves but my question to him is why as they were not on the car in the first place and the brakes functioned properly. I have vacuum bleed the system a few times (manual hand pump and electric pump) now and also manually bled it along with trying to let gravity do the job but no luck. I'm out of ideas and hopefully someone here can shed some light on what I'm missing. At seventy five years of age getting up and down under this car is becoming something I should sell tickets to see!
Thank you All in advance for any advice and Merry Christmas to you and yours.
Mike
Thank you All in advance for any advice and Merry Christmas to you and yours.
Mike