Well i swapped a 9 bolt rear end to my car that originally had a 10 bolt drum. I never put on a prop valve and thought it would have worked fine with out one. But the hose to the right caliper has poped on me two times. I was woundering by installing a wilwood manual prop valve it will work correctly? .

But someone told me that our drums use 10 psi and disc use around 5 psi. Is this true? I also read up on the wilwood prop valve and it says that it is adjustable from 100-1000 psi.

 

You're confusing a residual pressure valve with a proportioning valve. The 5 and 10 PSI valves are residual, which are designed to hold that amount of PSI to the brakes when the pedal is released. The adjustable proportioning valve does exactly what it's name implies - it is an adjustable pressure valve which proportions the pressure between the front and rear hydraulic circuits to balance the braking action for a given application.

 

So then which residual do i need? 5psi, 10psi? -Eric

 

Typically, with drum brakes they recommend the 10 lb. valve to compensate for the return spring tension. I have drum brakes on the rear of my car and don't use any residual pressure valve, and don't have any problems. If you keep your drum brakes properly adjusted, it shouldn't be a concern. The 2 lb. valve is used when you have a master cylinder mounted lower than your calipers (common in full tube chassis race cars), to prevent fluid drain-back. I don't like to use any residual pressure valve of any sort if I don't have to, because they can only contribute to brake drag, but if you find yourself "double tapping" the pedal, you probably should look into installing one. It's highly unlikely it would correct the problem you're experiencing though.

 

Well i have already poped two hoses, and now have no rear brakes. There has to be something out there that they sell, that will help my aplication.Whats up with the prop valve that wilwood has? Why can i use that?