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Old 04-06-2011, 09:06 PM
Hwyhogg's Avatar
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Disc/drum brake set up...

Looking for someone with a similar set up or a brake pro. My 56 panel will have a ford 9" with drum brakes and front disc brakes. The front components are Granada 11" rotors with chevy s10 calipers. I have a dual master cylinder with a 7" booster. Do I NEED a proportioning valve and/or a residual valve? If so, where are they best plumbed and mounted? What size residual valve? Sorry for the numerous questions, but looking to be perfect on the brakes if no where else....Almost forgot. I am converting to a hanging pedal, so the m/c and booster are on the firewall underneath on the frame. Does the rear line get fed from the front or rear of master cylinder?

James

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Old 04-06-2011, 09:53 PM
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Hi James
You'll need both a proportioning valve and a residual valve.
The rear well (larger of the two) feeds the front.
Plum the residual valve after the proportioning valve
Rich
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Old 04-06-2011, 11:40 PM
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If you buy a master cylinder designed for a front disc, rear drum set up, it should have a residual valve in it. It would be located under the brass flare seat in the master cylinder. You can screw a sheet metal screw into the hole in the seat and use pliers to pull on the screw head to pull out the seat so you can check. The residual valve is a small rubber piece with a small slit in the end. This is all you need.
As for a porportioning valve, several companies make adjustable ones that you can plumb into the line leading to your rear drum brakes. When you get the car on the road, you can play with the adjustments to get the correct front to rear bias.
Good luck,
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Old 04-07-2011, 08:27 AM
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Just re-read my post; It should read the m/c & booster are NOT underneath on the frame....The master was part of a kit I bought to install the hanging pedal, so I don't know much about the specifics. I will post some pics so maybe someone will recognize it as a disc/drum master cylinder...I do have the whole m/c, booster and valving from a 95 f150, and it looks like it has a combination type valve (brass)....would that work on my car? Thinking the adjustable would best for my application....
Thanks for the responses
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Old 04-07-2011, 09:00 AM
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Just found this brake article...

"Distribution Blocks or Combination Valves: One of the biggest misconceptions is the distribution block or combination valve. Almost every factory car has one. This usually serves as a metering block to adjust the proportioning to the rear brakes, as a "T" fitting for your front left and right front brake lines and brake light warning switch. What people fail to understand is that each car is "engineering" for a specific distribution block based on weight, braking characteristics and tires. So generally most factory cars have different blocks.

Ask yourself this. How can one distribution block be engineered for all applications? So, we have this 23T with tiny tires in front and big tires in the back, we have a 57 Caddy and a 57 Chevy pick up. Do you really think the braking is the same for all three vehicles?"
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Old 04-07-2011, 10:09 AM
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morning hog. i use the complete set up from an s10. the proportioning valve is hung on it and plumbed. no need for residual valve.
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Old 04-07-2011, 11:43 AM
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Thanks Shine...the rest of the truck ain't bad either, lol
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Old 04-07-2011, 11:46 AM
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truck stops really well. I've used the s10 stuff for about 10 years. i get the pedal assembly too .
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Old 04-07-2011, 07:33 PM
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dang shine, nice truck.
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Old 04-07-2011, 07:42 PM
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i built it for a lawyer here in texas. really nice truck. too bad he never drives it.
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Old 04-07-2011, 08:18 PM
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Here are some pictures of my M/C...the cylinders appear to be the same size, does that mean I can use either one for the front or rear? Also on the driver's side, there are two plugs, I assume my front/rear lines connect there. On the passenger side of the master cylinder, there are two screws that are only finger tight. Do I just leave those screws in and snug them up? Dang shine, wish I'd used the S10 stuff...oh well, next time
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Old 04-07-2011, 08:25 PM
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you can plumb out of either side. find a gm proportioning valve and hang on the booster . i get the whole s10 set up for around 40 bucks. what ever you do dont order a new one $$$$$$$$
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Old 04-07-2011, 08:36 PM
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okay, thanks. Not to be a P.I.T.A, but any suggestion as to what years? Saving money is always good. Shine, does the S10 use a residual valve in line to the rear? Again, thanks for your patience...the brakes are the one area I can't afford to fail.
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Old 04-07-2011, 08:54 PM
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just about any year s10 . most get crushed. the last one i got was a 93 i think. the residual valve is only used when the m/c is below the calipers. the gm valve is all you need. should be able to find one in a salvage yard. i have a junker here that pulls the s10 stuff for me. i use s10 columns too. no neutral safety switch needed.
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Old 04-07-2011, 09:09 PM
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Thanks, I'll get my yard crawling clothes out tomorrow! Been wanting to visit some salvage yards anyway.
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