The Stovebolt Site Forums The Shop Area Driveline Dual MC Brake Install Questions

I am using the kit to install a dual MC in the same location as the original (under the floor)with the prop valve positioned under the MC.

1) There is a copper or brass rod about an inch and a half long with a rubber bushing on it with the kit. It fits into the MC before the plunger goes in. If I use it, the plunger shaft is too long to line up with the linkage hole. I have the adjustment screwed all the way in. Was that an optional piece that maybe works with a different install? If not, what am I doing wrong?

2) I have an overdrive transmission and from the looks of things there MIGHT be a conflict with the space between the shifter lever (2nd one back) and the MC bracket. I am also a bit worried about the prop valve lines to the MC and if they might be in the way. Anyone with an Overdrive and a dual MC under the floor out there? I don't have the engine installed yet but was hoping to get the brakes working first.

Thanks again!

If you are using stock brake system at the wheels, you don't need the proportioning valve. Have you switched to disc? Can't help on the short rod.

Deve: What is the truck? and what vendor? Booster or not? Part Number? Maybe I can help.

50 3100, no booster. Its the common upgrade kit that CPP and Brothers sell. I got it at the same time I got the disc upgrade kit.

http://www.brotherstrucks.com/prodinfo.asp?number=MSTR900
http://www.brotherstrucks.com/prodinfo.asp?number=PVK4759
http://www.brotherstrucks.com/prodinfo.asp?number=NOFX559

The MC is pretty big but its nice having the prop valve mounted directly under it. I have done some measurements and its all VERY close so I am hoping someone here has a similar setup. Thx

http://s160.photobucket.com/user/st...rehbiel%201950%20Chevy?sort=3&page=1

May be a few clues there. Thanks all!

I found the master cylinder used on my 1970 Nova is a good replacement for the truck if using 4 wheel drum brakes.....manual non boosted of course.

John

I would call the company you ordered the kit from about that inch and a half long rod
My dual just uses just the yoke plunger
...pic...

Its the VERY same kit. I have the same setup, but before you put the yoke plunger in, was there something else that you stuck in the hole first that was in a small plastic bag in the kit?

No, just the plunger

Ill see if I can find my spare parts bag, I did my conversion about 4 years ago.
could be the set up has changed since then

Maybe someone who has done a kit recently might have an idea?

Might be a universal part in case a booster is used

I installed a disk brake, power assisted dual MC kit from CPP ( I believe). I found that I needed to shorten the "plunger" a small amount.

it looks like all it is, is an extension to effectively make the plunger longer. But whats throwing me is, the rubber seal around it. Makes me think if I use just the plunger without it, it might leak?

After searching the world over, turns out the piece in question is a short stroke adapter used in brake booster applications. So, the only question left now is clearance for the OD and I have decided to be SURE so I will put the motor on the hoist and temp install it on the frame to make sure. No problem right? LOL!

We are a unique breed compadres..... the hard way is just the norm for us! If it wasn't impossible, anyone could do it!

Deve:

I think you figured you application out, but for others, the "rubber seal" is simply a dust boot (if I have what you are talking about correct). The extension rod can be unscrewed from the master cylinder "plunger" and shortened. I shortened the extension to ensure the jamb nut was not forced past the dust boot.

No, this has nothing to do with the big rubber dust boot. Its like adding an inch and a half extension to the plunger. Turns out that piece is for booster systems. So, anyone doing a dual MC upgrade but no booster, there is a piece in the box that you don't need and will waste lots of time removing the MC, installing the MC, removing the MC, etc etc. LOL!

Your clearance issue is the same I had. I installed a Corvette type MC with the ports on the frame side instead of on the trans side. You have to bend your own lines do the other plumbing needs, but it should solve your problem. See if you can exchange your MC for another one with the ports on the other side and piece together your control items.

Here is a picture of the trans side of my install.

http://s101.photobucket.com/user/lo...20Shoot/IMG_1338.jpg.html?sort=4&o=3