Proportioning valve revisted
Thread Starter
Race Director
Joined: Mar 2001
Posts: 11,322
Likes: 1
From: Living in the Hartland
Proportioning valve revisted
I came across this on the CHP website today and think this article will clear up any confussion on the subject. Seems our 'block' is really a 'combination valve' that acts as both a fixed (non-adjustable) proportioning valve and a low pressure warning device. Check it out:
http://www.chevyhiperformance.com/ed...&viewtype=text
http://www.chevyhiperformance.com/ed...&viewtype=text
Le Mans Master
Joined: Sep 2001
Posts: 7,739
Likes: 630
From: Unreconstructed, South Carolina
Re: Proportioning valve revisted (Fevre)
I came across this on the CHP website today and think this article will clear up any confussion on the subject. Seems our 'block' is really a 'combination valve' that acts as both a fixed (non-adjustable) proportioning valve and a low pressure warning device. Check it out:
http://www.chevyhiperformance.com/ed...&viewtype=text
http://www.chevyhiperformance.com/ed...&viewtype=text
From above-referenced CHP article: After disc brakes began appearing on production cars, the factory came up with a device called a combination valve. This valve is placed downstream of the master cylinder and performed both as a proportioning valve to reduce the pressure to the rear brakes while also acting as a failure warning device to trigger a light should a loss in hydraulic pressure occur. Factory combination valves are carefully engineered to reduce pressure to the rear brakes to balance the braking effort for maximum braking efficiency. Unfortunately, this device is not adjustable, which means any change to brake or suspension components may create a premature rear-brake lockup problem.
Racer
Joined: May 1999
Posts: 268
Likes: 1
From: CT
Re: Proportioning valve revisted (Fevre)
Im not sure when when GM started putting combination valves in the vettes but I know that as of 71 (or at least my 71) has the older style which is simply the pressure differintal switch and distribution block. The adjustable aftermarket valve looks like a good idea for anyone who likes to drive fast :D
