The Stovebolt Site Forums The Shop Area Engine Shop Which dual master cylinder ??

Those of you that have changed from a single to a dual master cylinder , which one did you use. In other words , from what year vehicle and what model ?? I've got the mounting bracket that I had bought from one of the vender catalogues, but they normally don't sell the M C., or I could get it alot cheaper at the local parts store. Also, could anyone show pictures of how you routed the new brake lines. Thankyou.. Elmer

Hy 1951 Elmer, A lot depends on what type of brakes your are ultimately going to end up with. There are dual master cylinders available for vehicles with all drum brakes, disc front drum rear, and disc all around, the disc/drum combination would also require the installation of a proportioning valve as well. So you have some decisions to make, hope that helps.

Hey 3B; I plan to keep the original drum brakes all around. Elmer

I went to a wrecking yard and pulled all of the brake parts off of a vehicle with similar brakes that i wanted to install... ie.. i raped a 76 chevy shortbed with disk front, drum rear and no power brakes... it works great.

Hy 51 Elmer, A master cylinder from any car or truck that had drum brakes all around should work, all you have to be careful about is that it has the correct mount for your bracket, hope that helps.

Hello Elmer. I am about to do the same upgrade on my 52 GMC. A couple of the guys over on www.oldgmctrucks.com have had great luck using this master cylinder with stock drum brakes.

http://www.partsamerica.com/Product...cearea=SHOP&sourcepage=SEARCHRESULTS

I have the master cylinder and it looks decent. After my king pin replacement I will start this next project.

Hey Phillip; I checked out the parts america site and that looks really good. Did you see if the holes match up with the mounting bracket? Any idea from what year and model that came from? Some say a MC from a 1967 Nova with drums all the way around works, I have no idea. Man, the more you tear into one of these old dudes, the more projects develope!!!! Alot of fun thuogh. Thanks

I must be blind or senial, but which make and year of vehicle could be robbed for a MC that uses 4 wheel drums and power brakes?There's a lot of info here but I don't see an answer to Elmers Queery.I too am interested.Vap Brake and clutch sell virtually any master cylinder for a Chevy for under $100.00 ,I just have to know which one is good.The 73-77 Chevelle one is $35.00 ,rebuilt and a 47-53 AD one is $90.00, just for example.

Good question about the master cylinder matching up with the holes on the aftermarket bracket. I ordered my bracket from CCP and once it is here I will let you know.

I was told the master cylinder is for a late 60's Ford Mustang. The master cylinder is new, not remanufactured and it has the port holes on the right side so it looks like a real nice piece to use for our application.

CCP sells the dual master cylinder to match up with their bracket, so worse case if this one will not match up I will send it back. But, the price for this master cylinder was a better deal so I figured I have nothing to loose but time if it will not work out.

Your right when you say there is always something!

I used a new master cylinder from Master Power Brakes (www.mpbrakes.com). They have them for every application! Brand new in the box - hard to beat!

Joe

THE ONE I USE IS BASED ON THE CORVETTE AND HAS 4 PORTS YOU CAN ALSO GET IT WITH A 7 INCH DUAL BOOSTER FOR ABOUT $130.00 ON EBAY, I MAKE MY OWN BRACKET AND WELD IT TO THE FRAME AND PLUMB MY LINES. NOW YOU HAVE POWER BRAKES AND IT STILL LOOKS STOCK.

I'm still not too sure which one to ask for when I walk into the old NAPA store here in town. Not real important right now as I will have to put him away for the season, it will soon be snow time here. A few of you mentioded new vs. reconditioned. I think new would be best , right?? Thanks Elmer

If you want to learn about brakes, check out this web site.

www.classicperform.com

Go to their tech section.

The dual master cylinder I listed above fits the CCP dual master cylinder bracket perfectly.

Once it is all installed I will post some updated information.

Ok, I wrapped this conversion up recently. Check my webshots page for the photos. This is a true bolt in application if you use the CPP bracket, it comes with all of the needed hardware. After you bend new lines you are in business.

http://home-and-garden.webshots.com/album/558217142nvDHEN

Mid-70's full size Chevrolet passenger (about the same weight) , drum/drum manual master...has built-in residual valves. The actuator rod hole is deep in the manuals...shallow in the boosted. The FoMoCo M/C will have a different distance between the two mounting bolts. Brackets are set up for the GM unit.

Routing your split is a matter of personal choice. You would be wise to replace the front lines as well as the rubber flex hoses. These are going to be the most critical but you can judge if all lines and rubber should be changed.
Hope this helps.

Dave

Very nice/clean/professional looking installation Phillip. Very nice slide show also, thanks.
Although I am not making this type of change to my truck, I am helping out on several other AD projects which are being up dated so this may come in handy down the road.
I have a question about one of the fittings. In the pictures it appears that the lines out of the MC are ¼” and I assume that there would be an inverted flare seat in the MC so you are using an inverted flare reducer for the 3/16” lines. Did this reducer come from CCP or did you find it elsewhere? My local autoparts store doesn’t seem to have a very good supply of fittings and I’ve been looking on the net for an hour or so and can’t find “automotive brake fittings” listed anywhere.

Denny Graham
Sandwich, IL