[TWC]

I've installed "Aerospace Components" front disk brakes on my 67 drag car. I will run 3/16 line from the new Strange master cylinder to a proportioning valve and then to a tee from there 3/16 lines to each front wheel. The master cylinder came w/ fittings to accept 3/16" lines both front and back.For the rear, I will run 3/16" line to a 10 lbs. residual valve.
This is where my question comes in. I have a new 1/4" line to the rear of the car but is Stainless steel. I can't flare the stainless lines w/ my tools so I'm thinking of replacing it w/ a new 3/16" line that I can work with. Is their any reason a 3/16" line to the rear won't work for the rear drums?? I have the 3/16" line and would like to use it. I can buy 1/4" line if necccessary but don't want to if not needed. The only way I could find to connect the new 3/16" line from the residual valve to the stainless 1/4" line was a compression fitting which makes me nervous. Comments??? Ideas??

 

[Hal_396]

I got this from "inline tube" web site. It answers your question I believe.
Typically the smaller the tube the more pressure it builds up, and the better the brake system will function. Disc's require about 1000 lbs of pressure and the drums use about 300 lbs. Disc brake cars use 3/16 tubing and drum brake cars use 1/4" tubing. If building a street rod that has front disc's, typically the entire system is plumbed in 3/16 tube.

 

[6t7gto]

TWC,
i helped a friend put a linelock on a 88 mustang.
metric to sae back to metric. what a fiasco.
went to the local advance auto parts and he let me behind the counter where they had drawers of all different kinds of flare fittings.
sae to sae adapter fittings should be able to be found.
david

p.s. 135mph with a compression fitting would make me REAL nervous,too.

 

[TWC]

Thanks, I'll go to the inline tube web site and do some reading.

 

[Pro68Camaro]

I'd go with the 3/16". I can't think of any reason not to. You could put one of those adjustable prop valves in the line if you are concerned about building too much pressure. I think it's fine to use the 3/16".