Fuel Hardline

[Beastofabug]

I'm going to replace my fuel pipe from front to back running under the car at the moment I've got AN6 braided fuel pipe but want to hardline instead what is the best 5/16"(8mm) pipe to use ? Ali or SS ? and where to get it from ?







 

[kielbasa]

I would suggest spending the extra time and frustration putting it through the Tunnel. Line size depends on motor. If you have or ever plan on having a nice big motor. Go 3/8 line, If not 5/16 is a good size too.

[Beastofabug]

I would suggest spending the extra time and frustration putting it through the Tunnel. Line size depends on motor. If you have or ever plan on having a nice big motor. Go 3/8 line, If not 5/16 is a good size too.

2332cc with twin 48idf's with a holley blue

[kielbasa]

I'd go 3/8 line to be on the safe side even though 5/16 is most likely enough. I did the 3/8 through the tunnel on my old 68. And also helped a buddy do the same in his 69.

[Fiatdude]

I used 5/8" lines front to rear AL -- that way I'd never have to worry about it again (in case you might want a turbo in the future) -- then used compression fittings at the end to 1/2" pipe -- So I could adjust to whatever size to the tank and to the engine I wanted  --- SS is more expensive, but easier to weld if needed --

I just did some 1/2" SS hard lines around the engine and had several split when I flared them (small cracks to the eye, but they still leak big time),,, I'm thinking it was because I used a tubing cutter to cut the tubing instead of a hack saw -- FYI

[RIP356]

How about just putting some braided fuel hose through the tunnel?
Would that work?
Thanks Dave

[Martin S.]

I used 3/8" aluminum running along the pan. I like the idea that if there was a problem the line would be easy to get at.

[Beastofabug]

I am going outside the tunnel so at least I can inspect it the original line in the tunnel leaked and when investigated there was fuel just sitting in the tunnel not good especially as I still smoked back then

[dth]

Speedflow or Earls for hardline , if you dont have a flaring tool , Speedflow sell olive/compression type fittings:)

[Beastofabug]

Speedflow or Earls for hardline , if you dont have a flaring tool , Speedflow sell olive/compression type fittings:)

thx i'll give them a look

[Paul Bahnstormerz]

I've just had Earls -6 aluminium delivered, using Earls compression olive fittings that give me a AN6 male fittings, for the holley regulator 3/8 npt to AN6 male, AN6 female/female coupling and AN6 compression fitting so I can hardline straight into regulator. A flexible line with be used straight out of the pump going into a Earls 30 micron filter and flexible by the transmission as I have to T piece out for a nitrous feed.

[Taylor]

I used 5/8" lines front to rear AL -- that way I'd never have to worry about it again (in case you might want a turbo in the future) -- then used compression fittings at the end to 1/2" pipe -- So I could adjust to whatever size to the tank and to the engine I wanted  --- SS is more expensive, but easier to weld if needed --

I just did some 1/2" SS hard lines around the engine and had several split when I flared them (small cracks to the eye, but they still leak big time),,, I'm thinking it was because I used a tubing cutter to cut the tubing instead of a hack saw -- FYI

What kind of stainless and what type of flare?

[kielbasa]

An uses a 37 degree flare

[Paul Bahnstormerz]

Getting a 37 degree flare in the UK was proving to be a pain, the common flaring kits are 45 degree

[richie]

Getting a 37 degree flare in the UK was proving to be a pain, the common flaring kits are 45 degree

I managed, will see if I can dig out the receipt and post were it was from

cheers Richie

[andy198712]

I saw on YouTube (yeah, I know) that earls I think it was do a push on conector that just pushes onto hard line and gives an AN end to it.

[Paul Bahnstormerz]

Those earls fittings are what I'm use, has a olive fitting and collar giving a an6 male fitting

[youngnstudly]

This may not be helpful to your situation, but this is how I like to do the hard line install (through the tunnel). I know a lot of people don't like to run the hard line through the tunnel, but I disagree with routing the fuel line anywhere else. I like to have the line exit the front of the tunnel (near the tank) from the side so I don't have to remove the factory line. The other end of the line exits through the left side of the tunnel at the rear (through the left grommet opening). To support the middle parts of the tunnel, I use steel angle and drill it for a -AN (Earls brand) tubing sleeve, and if I can, I like to tig weld the angle to the inside of the tunnel on the passenger side. If I can't weld it, I use large head rivets to hold the bracket(s) in place.

Here is the setup in my Ghia. The line passes through a fitting I welded into place:


Here is the angle I used along with the tubing sleeve that is pressed into the angle, then epoxied from the back side:


Andy

[stealth67vw]

I used 3/8" aluminum running along the pan. I like the idea that if there was a problem the line would be easy to get at.

That is almost exactly how I ran my 3/8" hardline.

[andy198712]

Those earls fittings are what I'm use, has a olive fitting and collar giving a an6 male fitting

Not a compression fitting, you literally push it on your hard line and it clamps on.
Like push fit heating pipes in your house these days... I'll have to find a link

[Beastofabug]

i'm planning to use these

[danny gabbard]

Ace stainless supply has the tubeing , Santa ana CA 714 540 1679 and mc mastercarr company use to carry it also . I think aircraft spruce in corona CA has the flareing tools

[kielbasa]

I used those compression fittings with the ferrule. They seemed to work fine never had an issue. I also bought the 3/8 tubing from McMaster car. We deal with them alot for my line of work.

[Beastofabug]

just ordered Krontec hardline tube aluminium 10mm od from demon tweeks

[gkeeton@zbzoom.net]

I guess the OP has already ordered some Aluminum line, but to anyone else thinking about a new line, the new Nickle Copper lines that are now out as replacement brake lines also work great for fuel lines. It is super easy to bend with the Copper in the alloy. I just did replacements of 3/8's, and 5/16's on a Chevy Venture Minivan, and they were easy to route, had compression fittings to connect the metal to the plastic fuel rail lines, and the NiCopp line is DOT legal in PA for use as fuel line.

[Paul Bahnstormerz]

i'm planning to use these

That's the fittings I'm using, then various AN6 fittings, throughout, only issue I'm having is going from an6 to 8mm hose tails for the nitrous take off. I've changed the carb fittings for AN6 too, so bloody expensive all those pretty blue bits 😳

[Beastofabug]

With an fitting I buy them I won't even look at the receipts if I ever added them up I'd probably have a heart attack but their so nice and shiny
Mmmm carb fittings haven't done them yet head breathers are next