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#1 |
Registered User
Join Date: Apr 2008
Location: Kansas
Posts: 191
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residual valve question
I am getting ready to install a ccp frame mounted brake booster set up for four wheel disc brakes. Question i have are residual valves nessesary for the setup i am running? Fluid level in master cylinder will be about 3 inches above front caliper bleeder and about 1 inch above rear caliper bleeder.
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#2 |
Registered User
Join Date: Aug 2011
Location: Tucson, AZ
Posts: 917
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Re: residual valve question
Probably not, gravity being what it is, but why take any chance? They're cheap and easy to install. Many, including the factory units, used RP valves on firewall mounted units because a little positive pressure in the lines is good insurance against air and contamination.
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#3 |
Registered User
Join Date: Nov 2011
Location: Langley, BC
Posts: 702
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Re: residual valve question
Answer: Yes. Because the MC is lower than the brake cylinders, you will need a 2lb/10lb valve or other means of preventing back-flow. At least that's what I remember from my first build.
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#4 |
Registered User
Join Date: Apr 2008
Location: Kansas
Posts: 191
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Re: residual valve question
Anyone have some pics of there brake booster setup and residual valves installed?
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#5 |
Registered User
Join Date: May 2006
Location: Detroit
Posts: 73
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Re: residual valve question
in the same boat, their page has so many different options. I noticed that the complete pedal and booset does not have the p-valve but the booster seperate has the prop value that has the check valves built in???
What lines are you going to run?? Have any links? Been looking alot at plumbing. |
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#6 |
Registered User
Join Date: Apr 2008
Location: Kansas
Posts: 191
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Re: residual valve question
checked there website and couldnt find any mention of built in residual valves.
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#7 |
Registered User
Join Date: Jul 2011
Location: shingle springs, calif
Posts: 771
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Re: residual valve question
These are the best one's i have.. even though they are on a Model A frame the brakes will be the same... this A had four wheel disc brakes that's why the residual valve's are the same color... drums take a red one..
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#8 |
Registered User
Join Date: Apr 2008
Location: Kansas
Posts: 191
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Re: residual valve question
I am going to install the valves but i have another question. valves have an arrow on them. I assume this is the direction of the fliud flow?
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#9 |
Registered User
![]() Join Date: Jul 2007
Location: Toppenish, WA
Posts: 15,522
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Re: residual valve question
I'm not sure on that one Hammerdog57 as I haven't done any research on the subject yet.
I see that the Wilwood units that Speedway has are marked mc and out http://www.speedwaymotors.com/Wilwoo...-PSI,1377.html With that I would suspect that the arrow on yours is the out side. Normally disk brake setups run the 2 lb residual valves front and rear. An adjustable equalizer valve in the rear brake line as you can see just behind the crossmember and in front of the residual valve in the rear brake line on the Model A frame that Parkwood posted is a good thing to have too as it allows you to tune the front/rear braking ratio. |
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#10 | |
Registered User
Join Date: Apr 2008
Location: Kansas
Posts: 191
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Re: residual valve question
Quote:
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#11 |
Registered User
Join Date: Aug 2011
Location: Tucson, AZ
Posts: 917
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Re: residual valve question
Your proportioning valve block may already have RP valves. Arrow in direction of flow(caliper) and as close to MC as possible. Here's mine. The rear is hidden by the crossmember.
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#12 |
Registered User
Join Date: Apr 2008
Location: Kansas
Posts: 191
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Re: residual valve question
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