I have 4 wheel disc brakes, Corvette 15/16 master, I don't know what the booster is from. There is a lot of pedal travel before the brakes apply. I spoke with PPG and OPG, both companies say they have problems with A body brakes. 2 questions, what booster came on 72 A bodies and anyone really happy with their brakes? Cheers!
Why is this in the 400--455 engine section? Air trapped in the system would lead to a low pedal and "squishy" brakes. If the master cylinder is tipped "up" in front, air can be trapped that WILL NOT bleed out. Level the master cylinder (raise rear of car until master is level or tipped "down", and pump pedal lightly, or disconnect master from booster WITHOUT removing brake tubes, pump primary piston with wood dowel or Phillips screwdriver.) Brakes out-of-adjustment would lead to low pedal and firm brakes. Wheel bearings out-of-adjustment would lead to low pedal. Warped rotors could be low pedal and squishy brakes.
That's what I was thinking. Separate the master from the booster. Put the pushrod in the booster and mark where it sticks out with a marker. Then do the same with the pushrod into the back of the master and mark it. The lines should be even or about 1/8" short. Anything shorter and you'll have excess foot pedal travel before the pushrod hits the master to apply the brakes. -Josh
