Re: poor braking
 

I race the Cuda without the valve.

Re: poor braking
 

I ran stock hoses with the factory disc. I believe with the Strange brakes you have to use the braided line for the required fittings. Like John said they don’t expand giving a firm pedal.

Re: poor braking
 

You can look up the part number on Rock Auto.
This is a dumb question, but do you have the lines hooked up to the proper ports on the master cylinder? Front to the rear and rear to the front.
Did the car have a power booster in it originally? Like someone else said in an earlier reply, the pedal ratio could be the issue.

Re: poor braking
 

Don’t use the stock type rubber hose over time it will deteriorate and will cause a restriction on on the return flow back to the master cylinder.

Re: poor braking
 

Change the master cylinder bore to a smaller diameter, I usually use one inch. The smaller the bore of the master cylinder the more force at the wheels. Pascal's law is used to calculate a well balanced brake system.


14.3 Pascal’s Principle and Hydraulics | University Physics Volume 1 (lumenlearning.com)

Re: poor braking
 

Don't forget the hose between the frame and the rear axle.

Re: poor braking
 

thanks for all the info parts are ordered

Re: poor braking
 

If installing Disk Brakes in the front and keeping the stock rear brakes you should install a Residual Pressure Valve i'm not too sure about the one you should use a 2 LB or 10 LB between the Master cylinder and the rear brakes according to Strange Engineering it also says to replace the 3 rubber hoses and install 3/16 steel lines


Kenney Kelley

Re: poor braking
 

Didn't the Disc Brake master cylinders have a residual
pressure valve right before the lines factory. It looks like
it would install in any mopar cylinder. We do not use any
on all our race cars. I worry about even a small amount of drag.

Re: poor braking
 

If you really want to diagnose then you need a pressure gauge. As someone mentioned smaller bore MC means increased brake pressure but also less fluid volume per stroke. Larger bore less pressure but more volume. Rock hard pedal is good but you might have other problems. What condition are the back brakes, most assume everything is good if they aren't leaking but wheel cylinders freeze up, good pedal just no braking action.