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Old 04-08-2010, 04:38 PM
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Jimbro727 Jimbro727 is offline
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UPDATE: I replaced both sides with NAPA wheel cylinders. After replacing the driver's side (where I was getting constant bubbles), it was a night and day difference. The brakes still weren't where I'd expect them to be, BUT it wasn't like having NO brakes. I then replaced the passenger side, and the pedal was either the same or a little worse. It's tough to gauge that sort of thing.

We then decided to start fresh and bench bleed the master. We got some bubbles. We then pressure bled the entire system, got some bubbles out of all four corners (expected). Pedal is still funky. The pedal isn't as firm as I'd expect, and no real braking power comes until the end of the pedal's travel. It just doesn't feel right.

While we had the master off, we decided to measure the booster rod. I'm not sure what we were supposed to be measuring, we pressed the pedal and measured how far it comes out, and it comes out just under 2". The rod coming out of the booster consists of a metal rod running through the middle of a larger cylinder. Both pieces move out and in as an assembly, but the smaller rod can be removed from the cylinder very easily. Is that how it is supposed to work?

Another note: I noticed that the pedal STOPS (reaches the end of its travel) a few inches from the floor. I can measure it exactly if needed. Is the pedal supposed to stop that early, or is it supposed to go down near the floor? With the M/C off, it drops down much more.


Any ideas? It's beautiful out and I need brakes!!

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1978 Pontiac Firebird T/A - Martinique blue/blue interior - 400 bored .030 over and stroked with an Eagle kit to 458, SRP forged pistons, Eagle crank, 6x heads, comp cams springs, comp cams hydraulic flat tappet cam, TH-350, and a Jeff Walker Q-Jet.



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