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Hot Rod Forum : Hotrodders Bulletin Board > Tech Help> Suspension - Brakes - Steering> Nova drum Master Cylinder compatibility with front discs...need fast help!
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Topic Review (Newest First)
01-25-2006 06:36 AM
IanRiordan Drum brake master cyls generally have a non return valve behind the brass cone in the m/c outlet. If you convert from drum to disc on either or both axles you must lose this valve (spring and split rubber cup.)
Disconnect the appropriate brake line, screw a self tapper into the cone and using a pair of side cutters pry it out. discard the valve, refit the cone and bleed brakes.
The valve is only there to maintain fluid at the wheel/cyls - calipers don't have return springs.
01-22-2006 07:49 AM
302 Z28 I did something similar years ago when I converted my 69 Camaro to front disks. I did not initially use a MC for disk brakes. It stopped OK, a little better than drums, but not what I expected disks to do. The original MC went south so I opted for a Corvette MC with front disks and rear drums, along with the proper proportioning valving. The difference was night and day, all of a sudden my Camaro had vastly improved braking.

Vince
01-21-2006 09:27 PM
Warrant I see, I will use my current MC, if Im not satisfied Ill look for a new power booster setup. Those scarebird brackets are really slick ehh... Thanks!
01-21-2006 09:18 PM
67 Deuce 4 Me I asked the guys at Scarebird about this and thay said drum drum master would be ok. Thats what I have on mine now and it works fine. They said that I wasn't pleased with the stopping power to switch to a disk drum master and proportioning valve.
01-21-2006 08:51 PM
poncho62 The disk/drum M/C has different valving than the drum/drum........I would imagine the proportioning valve is different also.
01-21-2006 05:41 PM
Warrant
Nova drum Master Cylinder compatibility with front discs...need fast help!

Im assembling my front disc brakes for my 1972 nova tonight, it uses a custom bracket that mounts rear camaro rotors with front celebrity calipers...the nova now has all drums, will my master cyilinder work without any mods? porportioning valve? residual valve? Thanks!

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