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#1
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master cylinder question 68 Pontiac
Can somebody tell me which circuit is the front brakes and which is the rear brakes? I am assuming that the circuit closest to the firewall is the front. Disk front, drum rear power brakes.
Thanks! |
#2
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Bigger reservoir is the front circuit.
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#3
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If both reservoirs are the same size was I sold the wrong master?
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#4
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Same size is correct
Front is rear The stay off valve for front disc to delay rear drum Plums from front reservoir . Are you running disc r drum?? |
#5
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I disagree.
GM usually had larger reservoir for factory disc, certainly with the later designs that had the front circuit in the rear. Are the fittings different size nuts for the hardlines? |
#6
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Oh man
I guess I should toss my 67-69 delco Moraine disc master cylinders away Not … |
#7
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The ports are the same size. I have it plumbed with the front brakes closest to the firewall, but the brakes aren't doing their job. It isnt in a 68 Bonneville, it's in a 63 with disk brakes up front from scarebird. I am going to try the 74-80 C10 master and see if that works and better.
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#8
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Quote:
the operative word here is "usually". 60's stuff is different. My guess is that as the circuits use the same amount of pressure, the front pads/shoes wear much quicker and since the piston is MUCH bigger will require more fluid to replace the space as the piston start point is further inward - hence the larger rez so it does not run dry. The OEM's did not sort this out right away - it took some time. |
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