Dual Brake Master Cylinder

[geordie]

Next project, update to dual master cylinder.
Question, what are the 360 degree turns in brakes lines next to the master cylinder for? A bit of flexibility in the line, thermal expansion.........

 

[Grabber70Mach]

Next project, update to dual master cylinder.
Question, what are the 360 degree turns in brakes lines next to the master cylinder for? A bit of flexibility in the line, thermal expansion.........

This is a copy of a reply to a question that I asked and think is what you are looking for, it came from Ultrastang.

Quote:
Originally Posted by zincyellow
Looks great is there an advantage having the loops in the lines? And how hard is it to do the flares on the lines.


In any hydraulic system were you have rigid lines, you do not want to make a straight, direct, run of the lines from one port to the other. When pressure forces build up inside the lines, it cause a small degree of flexing. Without a bend, loop, or offset in the line the force would be more concentrated at the ends were the connections are made. This will lead to the failure of the flare on the line, and leaks will occur.

The loops in the lines mostly just help in making it easier to line the fittings up with the threads in the ports to get the fittings started more easily.

A couple of articles on bending/flaring brake line tubing:

http://www.classictrucks.com/tech/05...ics/index.html

http://www.carcraft.com/howto/50919/index.html

 

[ultrastang]

This is a copy of a reply to a question that I asked and think is what you are looking for, it came from Ultrastang.

Quote:
Originally Posted by zincyellow
Looks great is there an advantage having the loops in the lines? And how hard is it to do the flares on the lines.


In any hydraulic system were you have rigid lines, you do not want to make a straight, direct, run of the lines from one port to the other. When pressure forces build up inside the lines, it cause a small degree of flexing. Without a bend, loop, or offset in the line the force would be more concentrated at the ends were the connections are made. This will lead to the failure of the flare on the line, and leaks will occur.

The loops in the lines mostly just help in making it easier to line the fittings up with the threads in the ports to get the fittings started more easily.

A couple of articles on bending/flaring brake line tubing:

http://www.classictrucks.com/tech/05...ics/index.html

http://www.carcraft.com/howto/50919/index.html

Yeah, what I said. ...is it ok to agree with myself? j/k

I've been fabricating brake lines for a while, but I've only ever fabbed lines with loops in them on one brake conversion that I've done. This was a '65 Mustang I had put Granada front discs on. A number of years later, I made some adapter brackets and adapted some Mk VII discs to the 9-inch rear under it. In the initial installation, I used a Mk VII/SVO MC without power assist.
http://www.ultrastang.com/Images/Scanned/June2002/09.jpg

After running it this way for a while, I changed the setup to include a power brake booster from a Fox Mustang. I didn't make loops in the new lines I had to bend for the booster installation though:
http://www.ultrastang.com/Images/Scanned/June2002/01.jpg

In 2004, I designed/made some adpater brackets to adapt some rear discs from a '96 V6 Mustang to the 8-inch rear end of a '65 fastback that belonged to a friend of mine. I used a 2.3L brake booster in this installation along with an SN95 V6 MC. I didn't make any loops in the lines I made to plumb everything up on it either:
http://img150.imageshack.us/img150/9703/kieths65053qx1.jpg