I used aircraft AN fittings for the hard lines on my car. This is per
Smiths book, BTW. The AN fittings use a 37 deg single flare, a sleeve that
takes up all rotational galling force, and a threaded outer fitting that
mates with all other AN fittings. This system is designed to allow
repeated assembly and dis-assembly, which no other hard brake line system
does. Factory fittings are designed to be tightened once only - even
though we all treat them as multiple use deals. The AN system has adaptors
to fit all british car applications.
Check this URL for further info...http://www.dimebank.com/BrakePlumbing.html
At 11:45 AM 1/14/01 -0500, Mark Palmer wrote:
>Seeking advice on main runs of brake pipes for racing a vintage production
>car -- specifically MGA. I'm NOT talking about the flex lines near the
>For the "major" lines running throughout the car, that are normally
>hard-piped on a street car, what is recommended?
>Have read C. Smith book -- not terribly specific in when to use hard lines
>vs flex hose.
>Alternatives I can think of:
>1) I already have a set of British-made, COPPER ALLOY pipes, with
>factory-type end fittings, made to length for my car. I am assured that
>these are NOT the type of copper that work-hardens & cracks. Could use
>these in combination with the usual braided-steel flex hoses at the wheels.
>WOuld need to make some alterations for dual-circuit brake set-up.
>2) Local shop that will be working on the project, has ability to fabricate
>& bend STEEL pipes, and of course would use braided steel flex hoses at
>3) Should I insist that local shop use stainless tube rather than plain
>4) Friend with sports-racer has recommended using FLEX HOSE for the entire
>car -- no hard piping at all. Easier to do than hard pipe. He specifically
>recommends Goodridge brand dash-3 size braided steel hose, which is
>supposedly a "tighter braid" and therefore resists expansion better than
>Aeroquip or Earl's or other brands. Says that even with all those long
>lengths of flex hose, the brake pedal will not be spongy, and that formula
>cars & sports racers are usually plumbed this way.
>Any experts have advice for a naive production-car driver?
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