Adjustable proportioning valve?

Upgrading the brakes on my 71 Charger.

Can I run direct from the master cylinder to the front brakes, and install an adjustable proportioning valve for just the rear brakes?

Yes, I've run that setup for a Wilwood knob style on mine since early 2000's. I highly recommend to not getting the MBM one, it's the definition of cheap Chinese knock off of the original Wilwood design. I bought one and adjustment stem had huge amount of play in in. The 2 valve part numbers from Wilwood are 260-10922 for one for 3/8-24 inverted flare and the 260-10922 has a 1/8-27 port but includes a 3/8-24 inverted flare adapter.

bohochg said:

Upgrading the brakes on my 71 Charger.

Can I run direct from the master cylinder to the front brakes, and install an adjustable proportioning valve for just the rear brakes?

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You may want to wait until you at least you road test the car after the upgrade, unless you feel your system is significantly imbalanced from the get-go.
Most balanced braking targets are front lock ups first with rears at the most only approaching lockup, and that is a moving target because of road conditions, fuel tank full or near empty, cargo, passengers, speed, etc
Pad choice also enters the picture and is also a tuning factor.
On my street cars I put the adjuster by the MC because I don't want others messing with it, on my track-oriented cars its down by the seat

j-c-c-62 said:

You may want to wait until you at least you road test the car after the upgrade, unless you feel your system is significantly imbalanced from the get-go.

Click to expand...

I agree. I installed one and its totally unnecessary. Waste of money.

I have 11-3/4" front discs, 10" rear drums. Manual m/c. No factory distribution block or prop valve.

Just installed this in my 65. Removed the " leaking" adjustable valve. No issues so far. I use DOT 5 fluid and a motive power bleeder.

It looks to be powder coated.




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