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#26 | |
But Found Her 25yrs Later!
![]() Join Date: Oct 2010
Location: Oregon City, Oregon
Posts: 10,518
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Re: Proportioning valve
I just noticed that SCOTI has the Front Right and Left opposite of the pic I posted.
Quote:
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I lost my 65 - Found it 25 years later: http://67-72chevytrucks.com/vboard/s...d.php?t=426650 66 C20 Service Truck: http://67-72chevytrucks.com/vboard/s...d.php?t=428035 |
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#27 |
Registered User
Join Date: Apr 2001
Location: DALLAS,TX
Posts: 21,933
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Re: Proportioning valve
How my prop valve is tagged is how they were plumbed in the truck. The proportioning is equal between L & R; just F & R is different so the fronts are actually interchangeable.
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67SWB-B.B.RetroRod 64SWB-Recycle 89CCDually-Driver/Tow Truck 99CCSWB Driver All Fleetsides @rattlecankustoms in IG Building a small, high rpm engine with the perfect bore, stroke and rod ratio is very impressive. It's like a highly skilled Morrocan sword fighter with a Damascus Steel Scimitar..... Cubic inches is like Indiana Jones with a cheap pistol. |
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#28 |
But Found Her 25yrs Later!
![]() Join Date: Oct 2010
Location: Oregon City, Oregon
Posts: 10,518
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Re: Proportioning valve
Looking at Parts Stores, it looks like combination valves aren't necessarily vehicle specific?
http://www.summitracing.com/parts/CLP-PV-2/
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I lost my 65 - Found it 25 years later: http://67-72chevytrucks.com/vboard/s...d.php?t=426650 66 C20 Service Truck: http://67-72chevytrucks.com/vboard/s...d.php?t=428035 |
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#29 |
Registered User
Join Date: Feb 2015
Location: las cruces
Posts: 218
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Re: Proportioning valve
I thought that you only need a propportioning valve, if you are useing disk brakes, my 64 C 30 panel has standerd brakes, please advise if i am wrong, Iwant to change to a duel master cylinder.
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#30 |
Registered User
Join Date: May 2009
Location: Motor City
Posts: 9,175
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Re: Proportioning valve
You are correct.
If you have four drums then you only need a "distribution block" and to tie into the rear system. The proportioning will take place via the wheel cylinder sizes. K
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Chevrolet Flint Assembly 1979-1986 GM Full Size Truck Engineering 1986 - 2019 Intro from an Old Assembly Guy: http://67-72chevytrucks.com/vboard/s...d.php?t=342926 My Pontiac story: http://forums.maxperformanceinc.com/...d.php?t=560524 Chevelle intro: http://www.superchevy.com/features/s...hevy-chevelle/ |
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#31 |
chevy truck fan
Join Date: Mar 2005
Location: Gilbert, arizona 85298
Posts: 1,980
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Re: Proportioning valve
This is nice information guys. I am in the process of "re-doing" a 1986 2wd (in the build section) and I am wondering as to why the proportioning valve is located on the brace in front of the motor? I would like to know if the valve can be relocated somewhere else?? I was thinking of replacing my booster and master with a later (mid '90's version) and placing the prop. valve next to the master with the lines relocated correctly. what do you guys think??
thanks!! |
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#32 | ||
Registered User
Join Date: May 2009
Location: Motor City
Posts: 9,175
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Re: Proportioning valve
Quote:
Quote:
(lol) K
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Chevrolet Flint Assembly 1979-1986 GM Full Size Truck Engineering 1986 - 2019 Intro from an Old Assembly Guy: http://67-72chevytrucks.com/vboard/s...d.php?t=342926 My Pontiac story: http://forums.maxperformanceinc.com/...d.php?t=560524 Chevelle intro: http://www.superchevy.com/features/s...hevy-chevelle/ |
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#33 |
chevy truck fan
Join Date: Mar 2005
Location: Gilbert, arizona 85298
Posts: 1,980
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Re: Proportioning valve
Keith,
i was hoping that you might return a chime in... ![]() ![]() thanks for the reply... I feel honored to have a response from you... very similar to getting a response from ken (N2TRUX)... ![]() ![]() |
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#34 |
Registered User
Join Date: Sep 2019
Location: Scottsdale Arizona
Posts: 114
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Re: Proportioning valve
Reviving this thread and hoping to find an answer.
I just converted my 77 to hydro boost, with a new master cylinder and adjustable proportioning valve, which is mounted just beside the master cylinder. My question is - can I just remove the old proportioning valve and tee the front lines together, and coupling the rears together since I'm using a new proportioning valve now? Or am I supposed to leave the old valve in place anyway? Last edited by Dleslie212; 11-26-2022 at 09:50 PM. |
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#35 | |
Proud Vet that loves the USA
![]() Join Date: Jun 2016
Location: Beebe, AR
Posts: 459
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Re: Proportioning valve
Quote:
Bubba |
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#36 |
Registered User
Join Date: Sep 2019
Location: Scottsdale Arizona
Posts: 114
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Re: Proportioning valve
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#37 | |
Proud Vet that loves the USA
![]() Join Date: Jun 2016
Location: Beebe, AR
Posts: 459
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Re: Proportioning valve
Quote:
Bubba |
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