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Old 10-22-2008, 08:44 PM   #97
jlaird
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Join Date: May 2004
Location: johnstown, NY
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Re: 67-72 Bolt in pedal assembly

I've done a little research on some of the other things that most of us will need to buy to finish off a brake system with a frame mounted booster/mc. jephs422, let us know if this is what you recommend.

I got this info from inlinetube.com. The following info is for 4 wheel disc.

First, we will need a 2lb residual valve after the MC, one on the front and one on the rear line. This is what they look like. They are $22.00 each.


Then on the rear line only we will need a adjustable proportioning valve. Price on this is $49.00 Here is a pic:


Here are the descriptions from inline on each:

Street Rod Valve Notes:
The adjustable valve is designed for both street rods and conversions using factory front brake lines. Of all the disc brake conversion configurations, using the adjustable proportional line valve is typically the easiest proportioning solution because it is installed anywhere in the rear lines between the master and the rear hose and controls only the pressure to the back brakes. No line pattern changes are necessary for installation. The front brakes get full pressure and the rears are turned down until they do not lock up and provide a smooth stop. Adjustment depends on tire, caliper and rotor size and is different for all cars. Adjustable valves can also be used on factory or race cars to fine tune the rear brakes or because of mismatched components.

Residual Valves:
These valves are used in brake systems where the master cylinder is mounted lower than the calipers, typically under the floor. This is a check valve that keeps either 2lb (disc) or 10lb (drum) of pressure in the system to prevent the fluid from running back and overflowing the master cylinder. These valves should be mounted as close as possible to the master before the proportioning valve. These valves are not needed on firewall mounted master cylinders.

And here is a diagram:
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