Another disc brake question

[Mator]

So I have installed a new McCaughey's disc break conversion on my 67. I still have drum back brakes. I have seen that some people recommend a 10 pound residual valve for the back drums. There seems to be a lot of travel in my pedal after bleeding the brakes so I was wandering if that type of valve is needed ? What do you think?

[webfoot]

If you have a lot of travel in your pedal after a disc swap, It is probably because there is a lot of air still in the lines.

[Mator]

That's what I thought. I took it to a shop to be bleed and it still has a lot of travel. Maybe it still has air. I am not sure.

[webfoot]

Before I give mine a final bleeding, I just "gravity bleed" and run a hose off the bleeder into a jar with some fluid already in it. Just leave it open for a while and watch your master so it doesn't run out, or you'll just reintroduce air into the system. I thought I had bled my system properly but after gravity bleeding I had a TON still in there. Start with the bleeder farthest away from the master.