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Username Post: help requested regarding brake lines        (Topic#374263)
joeblow55 
Contributor
Posts: 105

Reg: 05-03-10
01-01-24 05:09 PM - Post#2865470    

I'm going to be buying materials soon to replace all brake lines ... which were removed and discarded decades ago. I will be custom fabricating and bending these lines, but I dont know what size tubing they are, I seem to recall the crossover line (left to right), may be different size tubing than the ones that go to each wheel as they come out of those junction blocks.
Then there's the one that goes to the rear.
I don't seem to see any specification on tubing size in any of my manuals, or I'm not looking in the right places.
Anyboby know off the top of their head ? Will (hopefully) select the appropriate sized lines to use with disc/drum combo in the near future




 


Bad56Sedan 
"17th Year" Gold Supporting Member
Posts: 1826
Bad56Sedan
Loc: Pasadena, Texas
Reg: 04-29-04
01-02-24 01:49 PM - Post#2865499    
    In response to joeblow55

3/16" and 1/4"
1955 shop manual brake section
attached 1955 manual page 5-5







Attachment: 2blblla1.png (845.44 KB) 19 View(s)

VC56S 2 door Sedan, 43 Years


Edited by Bad56Sedan on 01-02-24 01:57 PM. Reason for edit: No reason given.

 
Shepherd 
Valued Contributor
Posts: 3276

Loc: Lake George, NY
Reg: 11-11-15
01-02-24 05:33 PM - Post#2865507    
    In response to Bad56Sedan

Seems that it would be wise to wait till the disc/drum conversion is done as the routing and connections will be different. My 51 is 3/16 all around, also disc/drum.



Edited by Shepherd on 01-02-24 06:05 PM. Reason for edit: No reason given.

 
joeblow55 
Contributor
Posts: 105

Reg: 05-03-10
01-03-24 06:48 PM - Post#2865550    
    In response to Shepherd

thanks for the responses. Im considering kits for the front disk conversion so am open to suggestions for a quality kit. Nothing super expensive,but basic factory-like disc brakes so I can use my factory spindles and stuff. Bolt on simple but works well. It is then I will finish the new brake lines. L to R and the flex
lines to each wheel will not change. The line to the rear, and from dual master to a proportioning valve will also be done by me so I wanna make sure I buy enough material (tubing) of the correct size, and all the other fittings I will need to finish up the job.



 
joeblow55 
Contributor
Posts: 105

Reg: 05-03-10
01-31-24 12:40 PM - Post#2866446    
    In response to joeblow55

looking into some of the reasonably priced disk conversion kits out there, there seems to be quite a range. What I am not seeing though, is any reference to backing plates. Alot of the kits that indicate they use stock spindles but do not seem to include backing plates ? ( alot of references to a "Chevelle" type rotor/caliper )For those that have used these type of kits, does one re-use the stock drum brake backing plates ? ...
Anybody care to share their experiences (good or bad) with these kits ?



 
55_FEVER 
Contributor
Posts: 233

Loc: Abbotsford, B.C. Canada
Reg: 01-23-02
01-31-24 09:28 PM - Post#2866461    
    In response to joeblow55

I’ve sent you a private message



 
joeblow55 
Contributor
Posts: 105

Reg: 05-03-10
02-01-24 08:38 AM - Post#2866474    
    In response to 55_FEVER

Did not see the private message ... are you sure you sent it ?



 
55_FEVER 
Contributor
Posts: 233

Loc: Abbotsford, B.C. Canada
Reg: 01-23-02
02-02-24 09:06 PM - Post#2866530    
    In response to joeblow55

Yes it’s there



 
4dr 57 
"11th Year" Silver Supporting Member
Posts: 4830
4dr 57
Loc: Texas Hill Country
Reg: 11-10-04
02-06-24 03:37 PM - Post#2866651    
    In response to joeblow55

I did not change the Stock spindles. The front end was entirely Stock. Not a dropped spindle.

I used about 10 foot of 1/4" line from the MC then reduced it on one end of a standard 10# (I think) Wilwood brake pressure residual valve, The other end was the standard size line to the stock type rear wheel cylinder at the rear. That set up worked perfectly once the nmergency brake adjustment was completed as recomended by the Assembly Manual.

On the front I used the standard 70 Chevelle discs and rotors with 69 Camaro brake rubber brake lines - the Stock 57 lines may work, I don't know.
Pipe plumbing went like this- I used 1/4" brake line on both wheels, afforded by the CPP Power Brake Assembly. It came completely adjusted.
To attach the new, bigger brake lines to the various inlets ans outlets, I bought all my brass adapters from Summit for a vary reasonable price. They will know what you will need once you explain what you are doing. I used Wilwood 2# residual valves up front.they also needed the brass 1/4 to 3/32" fittings.

PS something you want to pay particular attention to is the adapter plate that mounts the caliper to the to the front spindle assembly. It should fit flat. It may very well need to be clearanced to fit. Check carefully.

A local hot rodder told me he used all 90's "stuff" when it came to residual valves and more, so this may be an option I know nothing about.




It's all good. Mostly


Edited by 4dr 57 on 02-07-24 12:45 AM. Reason for edit: I have added some information about the adapter plate and other things. Please reread if you have alreaduy read my blurb.

 


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