dual circuit brake master cylinder better than single circuit?

[Garrett]

I have a 65 911; it came with a 17mm single-circuit brake master cylinder. I've since replaced it with a 19.7mm single-circuit master cylinder.

Other than a redundant circuit for safety reasons, is there any benefit (stronger braking perhaps?) to the dual circuit over the single circuit? Not to curse myself and others with old cars and single-circuit systems, has anyone heard of the single circuit failing??

Just curious!! Thanks for any input.

[Bill Verburg]

Safety is the only additional benefit. If you lose a flexible brake line at one end of the car w/ a single cyl. you have no brakes at all, w/ a dual set up the other end will still fuction.

[jthwan22]

I think the dual set up is in a X pattern. ie: RR with LF and LR with RF. That way, if one side failed you still fave brakes front and rear

[Bill Verburg]

All 911s are now and have always been(since the introduction of dual circuits), 1 circuit front and 1 circuit rear

[ChrisBennet]

I thnk my old VW Rabbit's & Golfs had that "X" setup.
-Chris

[Bill Verburg]

Most cars do use the dual diagonal setup, but not 911s