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| | | Joined: Dec 2005 Posts: 1,026 'Bolter | | 'Bolter Joined: Dec 2005 Posts: 1,026 | Since I have my truck apart, I have been toying with the idea of converting to rear disc brakes. I recently installed a Chevy II rear end which will require a brake job anyway. I see brackets for sale all the time on ebay but was wondering has anyone done anything similar? Is there a salvage swap that would do the trick? I'm running a firewall mounted booster/master cylinder, so do I still need to install a proportioning valve & residual pressure valve?
Robert C. If it's true what they say, "You learn from your mistakes," I'm a Genius in the making. 1950 3600 | | | | | Joined: Nov 2006 Posts: 677 Shop Shark | | Shop Shark Joined: Nov 2006 Posts: 677 | I installed a 1981 Trans am disc brake rear end in mine but Im not sure if there's a salvage yard swap that would work on your Chevy II rear end there's some really cool conversion kits out there. I'm also running a firewall mounted booster/master cylinder on my 51 and yes you will have to get a disc/disc proportioning valve,
Drum Brakes require residual pressure of 10 lbs, The disc/disc setup does not require this pressure. They only require 2 lbs of pressure
But I don't think you'll need to get the residual pressure valves They run in-line and act as a one way check valve and prevent fluid from bleeding back to the master cylinder. They are usually only installed when mounting your master cylinder under the floor
you shouldn't have the problem with fluid bleeding back to the master cylinder on the firewall mounted booster/master cylinder
Todd
Some people are like Slinkies, Their not really good for nothing... But they still bring a smile to your face when you push them down the stairs. 1951 3100 350 TBI Gallery Toddzilla... "$old" | | | | | Joined: Dec 2005 Posts: 1,026 'Bolter | | 'Bolter Joined: Dec 2005 Posts: 1,026 | I was under the impression that the proportioning valve had residual pressure built in.
Robert C. If it's true what they say, "You learn from your mistakes," I'm a Genius in the making. 1950 3600 | | | | | Joined: Mar 2005 Posts: 1,029 Member | | Member Joined: Mar 2005 Posts: 1,029 | Some master cylinders have the residual pressure valves installed and the proportioning is designed in for the application. A stand-alone proportioning valve would need to be different for disc or drum brakes if the residual valve was integral. | | | | | Joined: Aug 2007 Posts: 1,859 Grumpy old guy playing with trucks, cars, and boats | | Grumpy old guy playing with trucks, cars, and boats Joined: Aug 2007 Posts: 1,859 | I built my own setup for my S-10 a while back using Camaro calipers, and custom aluminum brackets to rotate the calipers to clear the leaf springs. Have a picture I can email if interested.
I also installed really big disc's on the front with Corvette calipers as I wanted Stop along with the Go.
A multi-position rapid adjust proportioning valve was used so I could add more rear brake bias when I ran loaded compared to empty. (Some Chrysler mini vans and trucks have the proportional valve tied in to the ride height, so when loaded the rear brakes get more pressure sooner.)
The problems we face today can not be addressed at the same level of intelligence we were at when we created them - Albert Einstein Or with the same level of $ - Me
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