Datsun Roadster Forum-311s.org

Does anyone know if there is a tandem master break cylinder that can replace of the original single, without too much modifying?

Thanks.

Yes, the Z masters work well. Check the main site for lots of info on exact models, etc...

You have to replumb, too...TR

Any stock 2000 or Z dual master cylinder can replace the single master cylinder. But, if you still have the hood from a pre 67.5 car it has to be replaced. All of the hoods from 67.5 and later are notched in the area above the master cylinder so the dual MC will fit, if you still have a 65 or 66 you need te replace the hood with a 67.5 or later hood.

Lou Smaldino
66-1600
67-2000

The hood is not the issue, just the front reservoir...If you put the old cylindrical reservoir on the frontmost section of the dual, the dual setup fits great in a 66 with a 66 hood. You can see it in my engine swap section...TR

Oooopps! Just checked my swap images because I wasn't sure and sure enough, the image shows the master with the provided tanks, prior to me swapping out the frontmost one. Simply loosen the screw, yank it off and replace it with the old one...TR

Uh, guys, I may be off the boat here, but there is a little more to it than what I have seen. If you are running with a stock engine and swap in the dual master to a car that originally had a single master, there will be interference with the aircleaner assembly. The hood issue that was mentioned ( the notched hood frame) would not be an issue unless you notched the firewall to mount the master like the later cars have. The mounting location for the early cars puts the master well ahead of the hood frame.

Now, if the engine has been swapped, the interference may or may not exist. It depends on what engine you put in the hole....

Best of luck!

Duh...I had forgotten about the air cleaner clearance!

Also, there is a bit of modification to the actuator...

I think you are on the right boat! Way to keep us in line! TR

If there's something that works, it's definitely worth researching. I have a later model hood, I think it's a '70, so it sounds feasible. Is there another air cleaner that solves the problem, 'cause I have the original motor. Thanks for your help.

You can purchase some lowprofile hi-flo foam Lynx carb air cleaners. The ones that look like strainer without a handle.

That might allow for more clearance.

There are some thin pancake aircleaners made for british cars that my give more clearance. Another option is to get velocity stacks and socks - that would probably give the most clearance. If you really want to get goofy, you can get two stock 1600 aircleaners, cut the rear mounting base/velocity stack off of them, and put socks on those - they would be pointing forward and up.