Simple proportioning valve question..

[Kdubslugga]

Ok so I just got done with my Cobra front and rear calipers and 13" and 11.65" rotors. Gotta say the car stops like a dream now, Ive never felt this in a fox. I also removed the factory prop valve and installed an adjustable prop valve. The instructions told me to turn completley counter clockwise until it stops, then turn 4 revolutions clockwise for initial setting. Im having a small issue, sometimes on stops i get this moaning brake noise, not sure how else to explain it, you can hear it and feel it. I thought maybe i needed to slighty adjust the prop valve but the instrcutions dont tell me which way I need to turn the valve. Sounds to me like its the fronts making the noise. So which way would i turn the valve to add to the fronts and which way to take away from the fronts?

 

[DukeGnarley]

usually screwing the knob in will reduce the flow to whichever side of the brakes you installed the valve on.

I think the noise you are hearing is unrelated to the proportioning of the brakes.

are you sure your pads are in right? did you use brake cleaner on the rotors?

 

[Mustang5L5]

I also don't think it's PV related.

You installed the anti-moan brackets on the rear right?

 

[FastDriver]

yeah, what he said. Moaning shouldn't be related to the prop valve. Something else is wrong, and if you can feel is, I think you need to go back and check everything on the brakes again. Ensure everything is properly tightened and aligned.

The prop valve, if installed correctly should only affect your rear brakes. To properly adjust, conduct hard stops on a dry surface until your rear brakes lock up first. Then, back them off so that they are just under the threshold of locking up first. In other words, when set correctly you want the front brakes to lock first, never the rears, but you want the rears to do as much work as they can without locking up. If the rears lock first in hard stoping or cornering, the rearend will try to come around on you - never a good thing.

Doing this on dry pavement is appropriate because wet pavement will not allow as much weight transfer. When the weight actually does transfer off of the rears, it will likely cause them to lock up first.

Chris

 

[Shakerhood]

I would guess you are missing the Anti-Moan Braces.

 

[Kdubslugga]

Got it figured out. I used brand new rotors that where zinc plated. I just drove the car around the neighborhood the other day, didnt wanna drive far because the plates are out dated. But today I went and got stickers for it and drove it a good 10 miles to seat the pads and the noise is gone noise. I guess the problem was just the rough surface of the rotors. But anyway all is good with the brakes now. Appreciate the tips! Cars brakes are night and day different!

 

[FastDriver]

Make sure you break in the rotors and pads the right way. I think Baer has some pretty good information on how to do this correctly on their website.

 

[FastDriver]

Here ya go:

Rotor Seasoning

Pad Bedding