powerbrake bleeding question
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Junior User
Joined: Aug 2002
Posts: 93
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From: S.E.Mo
powerbrake bleeding question
This is probly a stupid question, but since I did a power brake swap and it's not acting like I think it should I feel stupid anyways, so I'll ask. When you bleed a system that has power brakes, AFTER bleeding the master cylinder, does the motor need to be running when you bleed the rest of the system? The reason I ask is, I don't seem to get the same flow ( using a rubber hose run into a container to catch the fluid ) as with the manual brake setup when bleeding the brakes. I put a kit from Master Power Brake on, It went pretty smooth, but I am wondering about the pedal ratio now. I measured from the back of the booster/threaded rod to the hole in the pedal and came up with 5 1/4 ". There's no way with the supplied threaded connector/rod setup they send you that you can get this short, so I improvised with a shorter connector to come up with the 5 1/4" I needed. Any advice you can offer would be great. Other than this, I feel they offer a pretty nice kit for an upgrade. MTIA, Al 
Senior User
Joined: Mar 2003
Posts: 421
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From: Canyon Lake Texas
powerbrake bleeding question
I put a MPB on my 63 F100 (see my gallery). The rod was way too long, I ended up threading it all the way up, and cutting most of it off. I also re-did the hole to get the correct 4:1 ratio, but the rod angle with the short rod was too severe, so I went back to stock hole. Did you bench bleed first? Also try bleeding diagonally two at a time (I used three people). I plan to do away with the MPB adapter bracket, drill new holes with a backing plate and mount mine directly on firewall. I couldn't use a Clifford intake because the MC is too close to the card. Mine works fine...now onto disc brakes!!
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