Looking to start plumbing in brake lines, what size would be recommended? Specifics: Tilton style master No power assist Disc fronts Drum rears Heavy on the front When would you consider running 1/4" instead of 3/16"? Does it make a difference, I can't see why it would, if there is a reason or logic behing bigger/smaller lines....let's hear why. Thanks for the help.
3/16 line is the standard in use today. the smaller size means that it can handle higher pressure. there is less surface area for the psi to push on.
The diameter of the line in a hydraulic brake system really doesn't have much affect on the braking as long as it is not restricting the flow. In other words, you won't improve your braking buy putting in 1/4" lines vs. 3/16" lines. The combination of the right master cyl. and the right wheel cyls. and pedal leverages, drum diameters and width or drums vs. discs is where its all at.
I do as most GM factory stuff from the 60s up, 3/16" from the distribution block to each front wheel, 1/4" from the distribution block to the rear brake hose, 3/16" to each rear wheel.
Hey droptop70ss could 1/4 on the fronts be use with your combo instead of 3/16. Would the rear have to increase as well. Hope this isn't hijacking the tread.
I am no brake designer so I copy what the factory did, so far all of my cars stop ok If you have parts designed for 1/4" I am sure it would work fine, as already stated the big thing is matching up the correct parts and pedal leverage. I try and stick with complete factory setups as far as master cylinder piston size, calipers, and wheel cylinder size. Brake pedals I modify as needed.
That Cunifer line is nice stuff, it's pretty, the mechanical properties are comparable to Bundyweld, it's a little more corrosion resistant, it doesn't work-harden quite as quickly as the Bundyweld if you're fiddling and tweaking bends, but it's considerably more expensive if that matters. And, yeah, I can't think of any places in a passenger-car brake system where I'd need 1/4in tube.
Most cars from the factory run 3/16 to the front and 1/4 to the rear flex hose, and then 3/16 to each rear wheel. I have always followed these ideas, and have had great brakes on my cars
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