The Ford Barn

Southtowns27 · 02-08-2024, 04:58 PM

I'm putting a '69 Mustang drum/drum master cylinder in my '46 pickup. Does it matter which port goes to the front or rear since both reservoirs are the same size?

KULTULZ · 02-08-2024, 06:24 PM

Actually no, but I would put the front brakes on the front port.

What is important is if the CHI-COM SLOPPY COPY included RESIDUAL PRESSURE VALVES in each outlet port which are needed for drum brakes. Most aftermarket do not.

Is the MC installed above or below the wheel cylinders level?

Gene F · 02-08-2024, 06:32 PM

The rear port always runs the front brakes. Go figure... It has to do with the way the piston works in the master cylinder I guess.

Alaska Jim · 02-08-2024, 11:33 PM

most times , if the car has front disc brakes, and rear drums, the larger reservoir goes to the front

KULTULZ · 02-09-2024, 01:38 AM

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Quote:

Originally Posted by Gene F

The rear port always runs the front brakes.

Not always. Differing time periods brake design and how the vehicle is valved (pre-ABS).

02-08-2024, 04:58 PM	#1
Southtowns27 Member Join Date: Sep 2022 Posts: 31	Master Cylinder which port is which I'm putting a '69 Mustang drum/drum master cylinder in my '46 pickup. Does it matter which port goes to the front or rear since both reservoirs are the same size?

02-08-2024, 06:24 PM	#2
KULTULZ Senior Member Join Date: Aug 2012 Location: IN A 'GALAXIE' FAR FAR AWAY Posts: 6,479	Re: Master Cylinder which port is which Actually no, but I would put the front brakes on the front port. What is important is if the CHI-COM SLOPPY COPY included RESIDUAL PRESSURE VALVES in each outlet port which are needed for drum brakes. Most aftermarket do not. Is the MC installed above or below the wheel cylinders level? __________________ *** - MULTI-VEHICLE SYNTHETIC TRANSMISSION FLUID - Multi-vehicle transmission fluids are becoming more and more popular in the marketplace. Oil marketers design these fluids for a wide range of automatic transmission types. While they are not licensed by any specific auto manufacturer ... ??? ... enough said ... DIAGNOSED CDO** - (OCD In Correct Alphabetical Order)

02-08-2024, 06:32 PM	#3
Gene F Senior Member Join Date: Mar 2012 Location: Ohio Posts: 1,973	Re: Master Cylinder which port is which The rear port always runs the front brakes. Go figure... It has to do with the way the piston works in the master cylinder I guess.

02-08-2024, 11:33 PM	#4
Alaska Jim Senior Member Join Date: May 2010 Location: Palmer, Alaska Posts: 1,575	Re: Master Cylinder which port is which most times , if the car has front disc brakes, and rear drums, the larger reservoir goes to the front