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Old 08-18-2011, 02:31 AM   #1
darkone
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Proportion Valve Required for upgrading to power brakes?

hey all, im about to add a power brake setup to a 70 chev c20 without power brakes. my question is, will the existing proportioning valve on my non power brake system work? or do i have to get a new proportion valve? also, is there a suitable solvent a guy can use to clean out the power brake unit? thanks in advance for any input.
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Old 08-18-2011, 02:37 AM   #2
stealthy '69
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Re: Proportion Valve Required for upgrading to power brakes?

The prop valve should be fine. They just make a difference between drum/drum and disk/drum trucks. I assume you're staying drum/drum, and just adding a booster. As far as cleaning the booster out, I'm not too sure. I'd be a little leery of some solvents when cleaning it though. You don't want something that'll eat the rubber parts inside it though.
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Old 08-18-2011, 07:24 AM   #3
cdowns
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Re: Proportion Valve Required for upgrading to power brakes?

drum/drum brakes do not have a proportioning valve// they have a simple distribution block only
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Old 08-18-2011, 12:52 PM   #4
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Re: Proportion Valve Required for upgrading to power brakes?

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Originally Posted by cdowns View Post
drum/drum brakes do not have a proportioning valve// they have a simple distribution block only
I ordered a new distribution block from GMCPauls for my 1969. Seems strange that it would distribute two brake lines into two brake lines. Maybe it's there for the brake warning light switch?

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Old 08-18-2011, 01:28 PM   #5
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Re: Proportion Valve Required for upgrading to power brakes?

WD 40 and air compressor will clean it good! no valve needed if you are drum drum.
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Old 08-18-2011, 03:51 PM   #6
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Re: Proportion Valve Required for upgrading to power brakes?

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Seems strange that it would distribute two brake lines into two brake lines. Maybe it's there for the brake warning light switch?

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Exactly.
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