Passing brake lines through the firewall

Geting ready to run brake and fuel lines in the car, any recomendations on fittings to get through the bulk head? 3/16 brake lines, and 3/8 for fuel

anplumbing.com

Get bulkheads, use the steel ones for the brakes, and the alum for the fuel.
-3an for the brakes
-6an for the fuel lines

Any reason to use a bulkhead fitting instead of a rubber grommet?

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-Jason

A bulkhead makes running the lines and working around them much more easy.

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Robert.

"You are way too normal to be on Rally Anarchy." Eddie Fiorelli.

For me it depends on the fluid transfer media. Tube or Hose. I like the bulk heads because they can make for a cleaner install, often times the pieces on either side is more managble due to shorter lenght. Also things become more servicable if you can take out a section instead of trying to fish a long piece out a hole in the firewall. Down side its more connections, more places to fail. But you pretty much know the bulkhead wont be wearing on your hose or tube.

Any thoughts on using swagelok?

I was trying to avoid AN stuff if possible.

phlat65 Wrote:
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> Geting ready to run brake and fuel lines in the
> car, any recomendations on fittings to get through
> the bulk head? 3/16 brake lines, and 3/8 for fuel


I have some -3 bulkheads for you at a nice price.
It's total bullshit that the -3 often cost 6-8 times what a -4 or -6 costs

I have a good selection of -6 in steel, stainless and ally.

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John Vanlandingham
Sleezattle, WA, USA

Vive le Prole-le-ralliat

www.rallyrace.net/jvab
CALL +1 206 431-9696
Remember! Pacific Standard Time
is 3 hours behind Eastern Standard Time.

Why/When would steel be better than stainless and alloy, or visa-versa?

Daniel Buehler Wrote:
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> Why/When would steel be better than stainless and
> alloy, or visa-versa?


Steel vs stainless= I got them at Boeing surplus
Alloy I picked up for fuel cell and oil cooler and fuel rail and turbo feed.

The steel I like when it might be higher pressures and chance of breakage.

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John Vanlandingham
Sleezattle, WA, USA

Vive le Prole-le-ralliat

www.rallyrace.net/jvab
CALL +1 206 431-9696
Remember! Pacific Standard Time
is 3 hours behind Eastern Standard Time.

How do you adapt the 3/16 hardline to the AN bulkhead? 3/16 is a 42 degree inverted double flare, and AN is 37 degree single flare?

Or, do you just slap together a bunch of AN/NPT/Inverted flare adaptors onto the bulkhead fitting?

JonArmstrong Wrote:
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> How do you adapt the 3/16 hardline to the AN
> bulkhead? 3/16 is a 42 degree inverted double
> flare, and AN is 37 degree single flare?
>
> Or, do you just slap together a bunch of
> AN/NPT/Inverted flare adaptors onto the bulkhead
> fitting?

You terminate the hard line in a flare nut---maybe 79 cents.
2 piece, one is the seat and it slides oner the pipe and into the nut.
Flare the tube, tighten.

You can completely safely flare the tube to SAE 45 and use it on a AN/JIC 37.5 in 3/16 and even 3/8".

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John Vanlandingham
Sleezattle, WA, USA

Vive le Prole-le-ralliat

www.rallyrace.net/jvab
CALL +1 206 431-9696
Remember! Pacific Standard Time
is 3 hours behind Eastern Standard Time.

JonArmstrong Wrote:
-------------------------------------------------------
> How do you adapt the 3/16 hardline to the AN
> bulkhead? 3/16 is a 42 degree inverted double
> flare, and AN is 37 degree single flare?
>
> Or, do you just slap together a bunch of
> AN/NPT/Inverted flare adaptors onto the bulkhead
> fitting?


Theres adapters for hard line to AN available anywhere you get your AN stuff from

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Gone fishing

I thought the AN adaptors for hard line were single flare (ie - not for 3000 psi brake line pressure).

JonArmstrong Wrote:
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> I thought the AN adaptors for hard line were
> single flare (ie - not for 3000 psi brake line
> pressure).


That for sure seemed to be what was said many years ago from my reading, even people saying you needed a double 37 degree flare for brake lines. And yes it does exist. But it seems like over time the single flare has become accepted for use on brake lines. However i would not use a any aluminum line single flare a seamless stainless line would be acceptable.