1960s Brake Booster rebuild.

[hmbmw21]

Anyone know where I can get my Brake booster rebuild and or is better to just go with a Duel master brake set-up? 1960 convertible.

[Michael Petti]

It's a personal chouce to switch or not. I had my booster rebuilt by Power Brake Exchange in Pittsburgh.  They are on line and have a phone, ask for Harold.

[Chicken Coupe]

I am also interested in some other opinions about dual vs single.    Advantages, How does the ride compare. Etc.   

[hmbmw21]

Thank you for the help. Also I believe single master has around 400-600psi applied to brakes and a duel is around 1200psi applied with a extra line to be fabricated.  Just a comfort factor to stop a 5000lb vehicle.

[badpoints]

I am also interested in some other opinions about dual vs single.    Advantages, How does the ride compare. Etc.   

It does not affect the ride. It is a safety issue. The front and rear are separated, so if you get a leak you only lose either the front or rear brakes not both.

[Cadillac Jack 82]

Hey thats what the parking brake is for   

[badpoints]

Hey thats what the parking brake is for   

When I was young, we called it the emergency brake. If I say that now, nobody knows what I am talking about. 

[Chicken Coupe]

Let me rephrase my question about ride quality,  I meant to say Stopping quality, distance, easier, etc   

[Caddy Wizard]

Dual circuit brake master cylinders versus single circuit brake master cylinders:

1.  They each develop similar line pressures (on the order of 1,000 psi).

2.  The difference in feel is negligible or none.

3.  The difference in stopping power (stopping distance) should be negligible.

4.  The main difference, and the reason that the US DOT required all cars to have a dual circuit master cylinder after a certain date in the 1960s is that in the event of a hydraulic failure in a single circuit master, all braking power is lost.  This can be the result when a wheel cylinder blows a seal, when a steel or rubber brake line develops a leak, or when the master cylinder itself blows a seal.  In each instance, a single circuit master cylinder will then lose all stopping power.  In that situation, you might be able to stop the car with the parking (emergency) brake, but since it only acts on the two rear wheels, it won't stop as fast or as well as the hydraulic brake system would.  On the other hand, if you suffer a failure in a dual circuit brake system (whether in the master, a wheel cylinder, or a brake line), you only lose half of your brakes, either the front or the rear brakes will still work.  This redundancy is the main advantage of a dual circuit master cylinder.

5.  Dual masters are also well suited to disc/drum brake setups, where the front and rear brakes might need different fluid flow volumes or residual pressures.