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Re: brake proportioning valve question
[Re: SSAAHemiFan]
#454850
08/30/09 07:41 PM
08/30/09 07:41 PM
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Joined: Oct 2003
Posts: 7,506
Az
Crizila
master
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master
Joined: Oct 2003
Posts: 7,506
Az
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Quote:
Have a 64 plymouth with 4 wheel manual drums.
I am going to switch it to a dual master cylinder and was looking at repro proportioning valves vs. using just a splitter block.
I was under the impression that a factory proportioning valve not only regulates the fluid flow front to rear BUT it also would also divert the fluid and apply full brake pressure to the working circuit in case of a leak?. (Via a valve inside).
Is this true ??
No, not true. Thats the job of the "DUAL" master cylinder. The porportioning valve will only tell you if you have a failure ( and it won't tell you weather the failure is front of rear ) in the brake system through a shuttle valve located in the valve that turns on a light on the dash. The valve will not shut off the fluid to the side that is leaking. The peddle will get lower and lower as you continue to use the brakes. You will not loose brakes altogether though, as the non-leaking side will still work - with a very low peddle though.
Last edited by Crizila; 08/30/09 07:45 PM.
Fastest 300
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Re: brake proportioning valve question
[Re: SSAAHemiFan]
#454851
08/30/09 07:42 PM
08/30/09 07:42 PM
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Joined: Jan 2003
Posts: 26,003
Rio Linda, CA
John_Kunkel
Too Many Posts
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Too Many Posts
Joined: Jan 2003
Posts: 26,003
Rio Linda, CA
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Factory drum brakes don't use a prop valve, for the dual MC swap you only need the splitter.
The INTERNET, the MISinformation superhighway
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Re: brake proportioning valve question
[Re: SSAAHemiFan]
#454852
08/30/09 07:50 PM
08/30/09 07:50 PM
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Joined: Nov 2003
Posts: 36,041
Lincoln Nebraska
RapidRobert
Circle Track
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Circle Track
Joined: Nov 2003
Posts: 36,041
Lincoln Nebraska
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IF you are having no proportioning problems now I'd suggest keeping your stock splitter block as you dont need a prop valve. unhook the rear brake line from the splitter, cap it(the splitter) w a brass inverted flare plug and run the line from the forward half of the new M/C to your now unconnected rear line & connect them with a brass double female inverted flare fitting & bleed em out.
live every 24 hour block of time like it's your last day on earth
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Re: brake proportioning valve question
[Re: Crizila]
#454854
09/01/09 04:03 PM
09/01/09 04:03 PM
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Joined: Jan 2003
Posts: 26,003
Rio Linda, CA
John_Kunkel
Too Many Posts
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Too Many Posts
Joined: Jan 2003
Posts: 26,003
Rio Linda, CA
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Unless the MC has two different bore sizes, a dual MC puts out the same pressure front and rear as a single of the same bore.
The INTERNET, the MISinformation superhighway
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