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Sun Aug 03, 2003 2:51 pm

What is involved in converting a 1956 oval stock master cylinder to the 67 and later dual circuit cylinder (in conjunction with disc brakes, cb or csp)?

Thanks for all the help people.
theSamba is the sh*t!

Sun Aug 03, 2003 3:22 pm

adding a reservoir with 2 chambers for fluid and some "blue brake fluid resistant hose", 2 stop light swithces and additional wires if you want the "redundancy" for the stop lights, 2 different metal lines to run out to the front flex hoses.

Sat Sep 20, 2003 11:42 am

I'm thinking of this conversion as well on my '59. Are there any changes required with the pedal assembly or can you use the original pedal assembly with the new master cylinder? Isn't the piston size different on the dual circuit master cylinder?

Tue Sep 30, 2003 7:22 pm

Is there a need for a shim/spacer or is this a straight swap?

Tue Sep 30, 2003 10:22 pm

you know everyone said I *had* to change the master cylinder when I installed my front discs- I didn't, backed the rear shoes off a click or two and have been driving around for a year or so like that. nice high pedal with solid pressure- so far so good- I'm not saying you shouldn't, just saying I've managed (so far) without it-

Tue Sep 30, 2003 10:32 pm

I am more interested in the dual res than anything else...I have had brakes go out...very scary...ebrake kept me from crashing...

Tue Sep 30, 2003 10:53 pm

I'll get around to it someday- maybe i'll have easier access while I'm replacing the front clip cuz I didn't change the MC earlier-

Wed Oct 01, 2003 5:57 pm

Olskool58 I believe you only have to change the master cylinder if you have the one with a 17mm piston. You are changing to a 19mm piston for more pressure. You may already have the 19mm m/c in there. That could be why your pedal pressure is still fine.

Thu Oct 02, 2003 10:08 pm

Is the stock 67 19mm?