Projects Master cyl question

Been a long time since I've replaced a master cylinder and need your expertise on which reservoir goes to front discs and rear drums. I'm using a Wilwood flat-top 1" bore. Does the larger reservoir feed the discs or the drums?
Thanks for helping a dummy!

 

Large compartment feeds the disc brakes.

 

have I ever mentioned that we need a sub-forum just for brakes?

 

BTW, this is usually the rear reservoir, closest to the firewall.
So rear brakes in front, front brakes in rear. You want the fronts to grab first, although if everything is bled properly, it will be at the same time.
Example

 

^^^^^ I’ll throw a wrench into the works.

 

You guys are golden! Thank you much!

 

Most I've seen are what I showed, but there is always an exception!
The willwood is probably equal size under the cover, like a corvette 4WDB MC.

 

https://www.wilwood.com/PDF/DataSheets/ds487.pdf

3rd page. But basicly, big pot disc, small pot drum.

 

FWIW
As posted by Johnny Gee, this disc/drum MC was used in most GM cars/light trucks from '69- ~'80 that used disc front brakes. This MC was then replaced by the 'metric' stepped quick take up plastic reservoir units in the late 70's.

Handy bit is this disc/drum MCs used the same port sizes as the drum/drum MCs in 67-72. So if you want to convert to disc in those cars(or a car that has used a GM 67-72 drum/drum MC) was simply a matter of changing the MC, no need for adapters or re-plumbing at the MC.

 

This ^^^ is the "urban myth" that @manyolcars was referring to [needing a "sub-forum"]

None of the braking system has any clamping pressure until all the pressures are equalized throughout the whole hydraulic system.
Even the floating piston in a tandem m/c will equalize [by volume] to the equal pressures front and rear.

I no longer give advice on brake threads
Usually because they are a total clusterfuck of mismatched components [and generic disc conversion kits]

 

I wish I could have given you 10 likes for this instead of just the 1. This is the most beat to death subject here on the H.A.M.B. It seems using the search menu never happens. Honest questions and some help I understand however most often it's from mix-n-match builders that shouldn't touch a Brake Job.

 

Another thing I love about the H.A.M.B. is that for every matter of fact answer someone will have a contradicting FACT about it. To me that means you better know what your doing and how your going to do it before you start.