Master Cylinder for Power Brake Conversion

[maginter]

Hi All -

Now that I have gone full circle on Power Brakes, I have a few questions. I have a disc/drum with the 5 lug conversion and a 93 Master Cylinder. Further down the road, I want to do the 10.5" disc brake conversion on the rears. NOT the big brake conversion.

Question 1: Can I used the same Master Cylinder for the disc/drum and disc/disc configuration?

Question2: I have seen so many post that I want to get my parts correct. I need a 1993 Mustang Vacuum Booster and a 1995 15/16" bore Master Cylinder, correct?

Question 3: How do I make the Master Cylinder look like the attached picture? I need to remote the reservoirs.
204914

If anyone has a reference parts list, I would really appreciate it for the small parts.

TIA,

Mark

[Ducky2009]

I used the following.
Vacuum Power Brake Booster - From a 1990 Mustang GT
Master Cylinder Mount Spacer - Available at replicaparts.com
Master Cylinder - From a 2000 Nissan Quest
Remote Reservoir Kit (2) - I used CNC Remote Reservoir Kit, BUT they are no longer in business.
You'll need reducers - The Nissan fluid connectors are 1/2" lines. Most reservoirs have smaller fittings.

The Nissan brake line ports are metric. I tried adapters from AutoZone but didn't like the fit. The threads were a sloppy/loose fit. I ended up buying short metric brake line, cutting and using the metric fitting on the standard (SAE) line and re-flaring the brake lines. Metric on one end (to the master cylinder) and SAE to the wheels.

The kits that you'll find on-line also have an arm to allow room for the vacuum booster (see the link below to Whitby). I cut the 3/4" frame tube and added a longer tube on to the outside of the original/cut rail and bolted in place. That was enough to clear the vacuum booster. https://thefactoryfiveforum.com/showthread.php?23523-Ducky2009-MK4-Build-9035&p=313733&viewfull=1#post313733

ALSO: If you're using a Mustang brake pedal box, you're good to go. If you have the Wilwood pedal box, you'll need a new brake pedal arm. Connecting to the aluminum brake pedal arm will be difficult. There is no mounting hole for this setup.
Read up on the kits that Whitby Motercar sells. https://www.whitbymotorcars.com/product/power-brake-kit/

Good luck

[maginter]

I used the following.
Vacuum Power Brake Booster - From a 1990 Mustang GT
Master Cylinder Mount Spacer - Available at replicaparts.com
Master Cylinder - From a 2000 Nissan Quest
Remote Reservoir Kit (2) - I used CNC Remote Reservoir Kit, BUT they are no longer in business.
You'll need reducers - The Nissan fluid connectors are 1/2" lines. Most reservoirs have smaller fittings.

The Nissan brake line ports are metric. I tried adapters from AutoZone but didn't like the fit. The threads were a sloppy/loose fit. I ended up buying short metric brake line, cutting and using the metric fitting on the standard (SAE) line and re-flaring the brake lines. Metric on one end (to the master cylinder) and SAE to the wheels.

The kits that you'll find on-line also have an arm to allow room for the vacuum booster (see the link below to Whitby). I cut the 3/4" frame tube and added a longer tube on to the outside of the original/cut rail and bolted in place. That was enough to clear the vacuum booster. https://thefactoryfiveforum.com/showthread.php?23523-Ducky2009-MK4-Build-9035&p=313733&viewfull=1#post313733

ALSO: If you're using a Mustang brake pedal box, you're good to go. If you have the Wilwood pedal box, you'll need a new brake pedal arm. Connecting to the aluminum brake pedal arm will be difficult. There is no mounting hole for this setup.
Read up on the kits that Whitby Motercar sells. https://www.whitbymotorcars.com/product/power-brake-kit/

Good luck

Thanks for all the information, this helps! What is your brake configuration disc/drum or disc/disc? If disc/disc, are you 10.5"/11.0" pr Cobra brakes?

[Jim Doak]

If you go to post #7 in my build thread, you can see what I'm doing. (FYI, I used the same master cylinder - SN95 Mustang Cobra - on my first build with Hydroboost brakes, and it worked great.)

https://thefactoryfiveforum.com/showthread.php?49920-Jim-s-Gumball2-Build-Thread

[Norm B]

Here is my answers to your questions:
1) No, the fluid volume needed is different between drum and disc brake cylinders/calipers
2) Not sure. In the Mustang the master cylinders are different between the small and big disc applications. I used the small brakes and the master cylinder from a 95 base model. The weight distribution, front to rear, of the V6 Mustang is much closer to 50 50 like the roadster.
3) Pull the reservoir off the master cylinder you decide to use and install remote reservoir nipples. These are available at http://www.lsbilletworks.com/ (click on the FFR link in the left menu box). Other sources may be available for less $.

HTH

Norm