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#15989 11/16/2004 2:36 AM | Joined: Nov 2004 Posts: 29 Apprentice | | Apprentice Joined: Nov 2004 Posts: 29 | adding a dual m/c and power booster combo under the floor. this is on a big bolt 1.5ton and im wondering about the proportional valves. its gonna be drum/drum and im gonna get some residual valves. wheres the best place to get those. thanks for your help. chris | | |
#15990 11/16/2004 4:52 AM | Joined: May 2001 Posts: 7,438 Extreme Gabster | | Extreme Gabster Joined: May 2001 Posts: 7,438 | You can find all sorts of good info about braking systems at ECI Hotrod brakes | | |
#15991 11/16/2004 6:24 PM | Joined: Feb 2001 Posts: 4,095 'Bolter | | 'Bolter Joined: Feb 2001 Posts: 4,095 | i installed a dual setup this summer on my 54 3100 i wish i had installed the proportioning valve at the time. i still have lock up problems but i have disc/drum setup. cost wise they run about the same. brotherstrucks.com, fatfendered are two places. hope this helps. i try to say money and usually cost me more in the long run. i had professionals to it and still have problems. but they did what i asked. ron
Ron, The Computer Greek I love therefore I am.1954 3100 Chevy truckIn the Gallery 2017 Buick Encore See more pix1960 MGA Roadster Sold 7/18/2017
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#15992 11/16/2004 10:01 PM | Joined: Jun 2004 Posts: 336 Member | | Member Joined: Jun 2004 Posts: 336 | Used a combination valve out of a 1980 1/2 ton pickup in my 54 1/2 ton. Got it at the auto wreckers. The combination valve gives you the residual valve, proportioning valve and warning light all in one unit. I did some braking tests and it seems to work OK.
Gord
1954 1/2 ton 235 4 speed
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#15993 11/17/2004 1:37 AM | Joined: Mar 2004 Posts: 3,068 'Bolter | | 'Bolter Joined: Mar 2004 Posts: 3,068 | On my 1 1/2 ton with the original drum brakes all around, I used a master cylinder for a 66 Pontiac Catalina that also ran 4 wheel drum brakes. Didn't use a prop valve and it drives as it is supposed to (for a 1948 truck),
Scott | | |
#15994 11/17/2004 2:56 AM | Joined: Jun 2004 Posts: 336 Member | | Member Joined: Jun 2004 Posts: 336 | OOPS. Just reread your post. You did say drum/drum. In that case you do NOT want the combination valve I was talking about. Sorry.
Gord
1954 1/2 ton 235 4 speed
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#15995 11/17/2004 6:58 PM | Joined: Jan 2002 Posts: 28 Junior Member | | Junior Member Joined: Jan 2002 Posts: 28 | 48flatbed were did you tap in for the vacum you need on the booster? I'm not up and running yet and not sure the 4brl holley PVC port or manifold riser port will give me a good 18in needed for the booster.... | | |
#15996 11/17/2004 8:04 PM | Joined: Oct 2001 Posts: 3,458 Extreme Gabster | | Extreme Gabster Joined: Oct 2001 Posts: 3,458 | Drum/Drum shouldn't need a proportioning valve. If you need to adjust brake bias you do it by changing the bore of the wheel cylinders.
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