Thread: Brake troubles

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Ok guys I worked on the brakes today, no good results. This is what I did.

1. disconnected front brake line to isolate rear brakes. The high hard pedal disappeared.
2. tried brake no good
3. bled the stuffing out of them
4. tried brake no good, just slows the wheels
5. put a New ( not rebuilt) Master cyl. (1980 corvette disc/disc 1.125 bore) on by passed all valves bled them to death and tried the brakes, no good again
6. moved rear brake line from rear reservoir to front reservoir by passing all valves. no good again
7. tried emergency brakes they didn't stop the wheels either and I can't pull any harder on the handle. This is very baffling, the arms on the calipers only move about 1/4 - 3/8" and the wheels can't be turned by hand, under power @ idle they turn with no problem. The same arms when no brake pads are in place will move 1.5 inches.
8. Took a bunch of pictures to show you.

The rod going into booster moves about 2 inches in when bleeding the system.
With the valves closed and the front lines connected the rod only moves about 3/4".
With just the back brakes connected the rod moves about 1-1.25".
Very solid stream of fluid during bleeding.