Running new brake lines

Just installed a dual master cylinder on my 54 Bel Air. I noticed that there are two different size brake lines under my car, not sure why. Should I do any modification since I am going to a dual set up, or just use the existing lines? Thanks,

Dirtbag63

 

It would be a good idea to replace them as they are going on 60 yrs old. Stock is 3/16 to the front and 1/4 to the rear, but if i were redoing everything i would run 3/16 the whole way. Cesar

 

When in doubt, throw it out. Most anything newer is plumbed in 3/16 from what I've seen. If the lines look clean and not rusted, then you have a judgement call on whether to replace them.

Bob

 

just take a look at them, my 56 looks good and plan to run the 55 year old lines but like said above use your best judgement.

 

I have mixed sizes on both of my cars. Seems to work fine...

 

I never trust 50+ year old brake line.

Here is the best line I've ever used. It's a copper-nickel 90-10 and looks great on old cars. Best part is it's easy to double flare, even with the cheapo flare tools.

http://store.fedhillusa.com/cnf3a.aspx

 

I'm currently doing the same. I'm replacing the lines with 3/16". Should be fine. I did this on a few stock cars and they all worked great. The last one I did I use a corvette master for disk all around, stops fine. I should finish the 54's brakes this weekend,I used a master from a 67 camaro for drums. I'll let you know how it works out.

 

Old steel ,...rust,.... Just put in all new,...Safer that way .

4TTRUK

 

Since it's your life, new lines are the only way to go in this case.

CRUISER

 

Check out Poly-Armour Steel lines or NiCopp brake lines. Available at NAPA. The Poly-Armour is priced pretty reasonably. I've been researching this because I'm about ready to run new lines on mine. They come in straight lengths of 8", 12", 20", 30", 40", 51", 60", (and some 72" or 84"). They also have the fittings installed on both ends, and you can bend them by hand, or the $15 Speedway bender.

http://www.agscompany.com/faq
http://www.agscompany.com/automotive/brake-fuel-transmission-lines/poly-armour
http://www.agscompany.com/automotive/brake-fuel-transmission-lines/nicopp

 

A shot of the new lines on my 54 Chevy

 

It's not always just age I just replaced 2 lines on my '98 dodge pu. Don't cheap on brakes or steering. And brake lines are cheap.
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