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#1 |
Registered User
Join Date: Jul 2005
Location: Edgewood, WA
Posts: 900
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Proportioning valve ??
Will a disc brake proportioning valve work OK on drums front and rear?
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67 C20/ 68 C10 stepside/inline 250--current project 71 GMC 4x4 70 Blazer project-Zombie assault vehicle 67 4x4 Burb ![]() |
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#2 |
~Rest In Peace~
Join Date: May 2005
Location: CALIFORNIA NOR CAL
Posts: 9,707
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Re: Proportioning valve ??
its a disc to disc PV or is it disc and drum PV ,i would think it would work being disc pv .
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is it fast ? it has a lighting bolt donut? B___H please, I can remove 90% of your so called "beauty" with a kleenex |
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#3 |
Registered User
Join Date: Jun 2010
Location: Upland Ca
Posts: 4,143
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Re: Proportioning valve ??
Please don't mix brake parts. You need those important safety parts to work correctly. Each brake component is designed and manufactured for a specific purpose and should not be mixed up. Easier to find the right part than to recover from an accident.
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1972 C10 SWB, Air, PS, PB, 350/350THM. Second owner. 1965 Corvette roadster, 44K miles, 327/365 SHP, 4 speed, side exhaust, knockoffs, teak, second owner (bought in 1970), Have ALL numbers matching components. My frame off restoration thread: http://67-72chevytrucks.com/vboard/s...d.php?t=556703 |
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#4 |
Special Order
![]() ![]() Join Date: Nov 2004
Location: Mt Airy, MD
Posts: 85,859
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Re: Proportioning valve ??
Drum brakes and disc brake require different pressure characteristics and the purpose of the proportioning valve is to keep the pressure in the proper "proportion" in the two separate sides of the system controlled by one master cyl.
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"BUILDING A BETTER WAY TO SERVE THE USA"......67/72......"The New Breed" GMC '67 C1500 Wideside Super Custom SWB: 327/M22/3.42 posi.........."The '67" (project) GMC '72 K2500 Wideside Sierra Custom Camper: 350/TH350/4.10 Power-Lok..."The '72" (rolling) Tim "Don't call me a redneck. I'm a rough cut country gentleman" R.I.P. ~ East Side Low Life ~ El Jay ~ 72BLUZ ~ Fasteddie69 ~ Ron586 ~ 67ChevyRedneck ~ Grumpy Old Man ~ |
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#5 | |
Senior Member
![]() Join Date: Feb 2011
Location: Clovis Ca.
Posts: 632
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Re: Proportioning valve ??
Quote:
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I'm sorry I called you stupid. I thought you knew already. 67 C-20 Custom Camper 68 Nova 396 it does wheelies 2005 Buick Century the one the wife drives 1989 Toyota Tercel to drive when I can't put gas in the first 2. |
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#6 |
67-72 parts collector,…
![]() Join Date: Nov 2002
Location: Mid-MO
Posts: 22,698
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Re: Proportioning valve ??
Drum brake trucks have a distribution block.
It's not a proportioning valve. Meaning,... it doesn't regulate the front vs rear brake pressures,... it just sends fluid to the 4 wheels. Use the correct parts on your drum brake truck.
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Keith Convert to disc brakes. http://67-72chevytrucks.com/vboard/s...d.php?t=444823 |
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#7 |
Registered User
Join Date: Aug 2002
Location: Muskogee, Oklahoma
Posts: 2,914
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Re: Proportioning valve ??
What about using differentials from a truck that came with anti-lock brakes? Will the discs work fine with a stock 71 setup?
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#8 |
Registered User
Join Date: Aug 2005
Location: Pasadena,Tx /Pto Pta DR
Posts: 5,415
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Re: Proportioning valve ??
as stated use the correct part. Prop valves send 70% to the front and of course 30% to the back. Disc brakes need more pressure up front than the rears. So all you are doing is sending that to the front on drums which is not needed. the part is not expensive so use the correct one
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#9 |
Registered User
Join Date: Aug 2005
Location: Pasadena,Tx /Pto Pta DR
Posts: 5,415
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Re: Proportioning valve ??
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