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Joined: Jul 2000
Posts: 1,503
G
Insomniac
Most of the "proportioning valves" I see advertised are more properly called combination valves as they have metering valve, proportioning valve and failure warning switch all in one unit. I assume that's what you have.

I don't have any additional RPVs in my setup. I have Camaro front disc brakes, Camaro rear drum brakes, Camaro combination valve and Camaro master cylinder. So it's all matched like GM designed and the brakes work great. (note that I have a 1/2 ton)

I see people on this forum adding RPVs. I assume that they have to do this because they are not using matched components and the rear brakes are not doing their share of the work.

You will have to do some testing.


Gord
----
1954 1/2 ton 235 4 speed
Joined: Sep 2012
Posts: 248
D
'Bolter
When I did the researching for what was needed there were a lot of discrepancies as to what the proportioning valve actually does. I contacted Master Power Brakes and they said that even with a proportioning valve I will still need the residual valves due to the MC being installed under the floor. Everything works good.

Joined: Jul 2000
Posts: 1,503
G
Insomniac
The MC on my truck is mounted below the floor, but it's still above the calipers as the suspension is stock leaf spring and straight axle. The MC has a built in RPV for the rear brakes. That's why I don't need additional RPVs.


Gord
----
1954 1/2 ton 235 4 speed
Joined: Sep 2019
Posts: 27
T
TKM Offline OP
'Bolter
Thanks guys ! I appreciate your feedback — going to call CPP tech line and see what they say. Question, why would it matter that the MC is above or below the calipers?

Joined: Jul 2000
Posts: 1,503
G
Insomniac


Gord
----
1954 1/2 ton 235 4 speed
Joined: Sep 2019
Posts: 27
T
TKM Offline OP
'Bolter
Got it — thanks insomniac !

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