1988 Dakota HSP Valve Bypass
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From: Alberta
Sorry I'm a little confused. Which ports are you running to which caliper? Are you running the front port to one caliper and the bottom port to the other and then using the rear port to power both back brakes?
Champion
Joined: Jan 2013
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From: Northwest Louisiana
RwP
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From: Alberta
Are you sure that would work? The bottom port runs to the back brakes so wouldn't it be supplying a different amount of pressure to whichever caliper you hook up to it and making the calipers apply pressure unevenly?
Champion
Joined: Jan 2013
Posts: 4,737
Likes: 374
From: Northwest Louisiana
Uhhh ...
You don't know how a proportioning valve / safety valve works, do you?
Look at this first: https://techtalk.mpbrakes.com/combin...ination-valves
There is no direct connection between the front and back halves normally. Matter of fact, if there WERE, it'd not do anything!
So, no. Total volume is controlled by the master cylinder; and both halves are the same on it. So I run the part closer to the firewall to the "front" of the proportioning valve (which will point to the back of the truck to make it easier to plumb), the other port on the master cylinder to the "back". The port on the very back runs down and back to the back brakes, where there's a junction block on the axle. The two on the front - one runs to the right caliper, one to the left caliper. It's moved the junction block into the proportioning valve is all.
Currently, you have one run to the junction block on the frame which then runs to the two calipers. Hydraulically, it's the same thing; factory is just one more fitting that can spring a leak.
RwP
You don't know how a proportioning valve / safety valve works, do you?
Look at this first: https://techtalk.mpbrakes.com/combin...ination-valves
There is no direct connection between the front and back halves normally. Matter of fact, if there WERE, it'd not do anything!
So, no. Total volume is controlled by the master cylinder; and both halves are the same on it. So I run the part closer to the firewall to the "front" of the proportioning valve (which will point to the back of the truck to make it easier to plumb), the other port on the master cylinder to the "back". The port on the very back runs down and back to the back brakes, where there's a junction block on the axle. The two on the front - one runs to the right caliper, one to the left caliper. It's moved the junction block into the proportioning valve is all.
Currently, you have one run to the junction block on the frame which then runs to the two calipers. Hydraulically, it's the same thing; factory is just one more fitting that can spring a leak.
RwP
Thread Starter
|
Registered User
Joined: May 2020
Posts: 8
Likes: 0
From: Alberta
Uhhh ...
You don't know how a proportioning valve / safety valve works, do you?
Look at this first: https://techtalk.mpbrakes.com/combin...ination-valves
There is no direct connection between the front and back halves normally. Matter of fact, if there WERE, it'd not do anything!
So, no. Total volume is controlled by the master cylinder; and both halves are the same on it. So I run the part closer to the firewall to the "front" of the proportioning valve (which will point to the back of the truck to make it easier to plumb), the other port on the master cylinder to the "back". The port on the very back runs down and back to the back brakes, where there's a junction block on the axle. The two on the front - one runs to the right caliper, one to the left caliper. It's moved the junction block into the proportioning valve is all.
Currently, you have one run to the junction block on the frame which then runs to the two calipers. Hydraulically, it's the same thing; factory is just one more fitting that can spring a leak.
RwP
You don't know how a proportioning valve / safety valve works, do you?
Look at this first: https://techtalk.mpbrakes.com/combin...ination-valves
There is no direct connection between the front and back halves normally. Matter of fact, if there WERE, it'd not do anything!
So, no. Total volume is controlled by the master cylinder; and both halves are the same on it. So I run the part closer to the firewall to the "front" of the proportioning valve (which will point to the back of the truck to make it easier to plumb), the other port on the master cylinder to the "back". The port on the very back runs down and back to the back brakes, where there's a junction block on the axle. The two on the front - one runs to the right caliper, one to the left caliper. It's moved the junction block into the proportioning valve is all.
Currently, you have one run to the junction block on the frame which then runs to the two calipers. Hydraulically, it's the same thing; factory is just one more fitting that can spring a leak.
RwP
Champion
Joined: Jan 2013
Posts: 4,737
Likes: 374
From: Northwest Louisiana
Possibly; I'm not positive that's all the front port does on the feedback. Since it's feeding some of the rear brake pressure into the front to adjust the proportioning valve; but others have blocked off that line on the front half and sent it that way. I just don't like that idea myself.
RwP
RwP