Flairing Lines for the Car

[Jwawhite]

AZ is brutal on rubber fuel injection fuel lines. Have a very minor seep near the stock Ford connector at the fuel filter.
This fitting is the one where you remove a plastic grey C clip to remove the fuel line on fuel injection systems.

Questions:
Is this fitting considered an AN?

Also, I understand that AN Fittings require a 37 degree flair.

I have a double flair set, is the first flair a 37 degree or do I have to buy a 37 degree dedicated set?

I will need to make up new fuel metal lines for this climate. Holley produces/sells an easily bending line and I'll only need rubber at the tank and fuel rails or cloth braided lines...
The Holley line is called "Easy Form Tubing" made up with softer materials.

 

[KULTULZ]

... rubber fuel injection fuel lines. Have a very minor seep near the stock Ford connector at the fuel filter.

Is your line rubber (reinf) or nylon?

1956 FORD 5.0L MPFI CONVERSION - HI-PRESSURE FUEL PUMP?

 

[KULTULZ]

If the 5.0L MPFI UPGRADE included a HI-PRESSURE FUEL PUMP, there should be no rubber line used in the system. The hose is not rated for high pressure.

Can you show photo(s) of the filter and fuel rail? Is the pump in the tank or on the rail?

 

[Jwawhite]

Hi Kultulz!

External fuel pump, 12v, 30GPH about 32 psi.

Pumping fuel through fuel injection 5/16 hose-- all the way from the tank to the fuel rail.
The pump is installed incorrectly with no pre filter !, pump is mounted up in the hump above rear axle and has to pull fuel up then push out to the injectors.
First one wore out at 4k miles.
Will install soft metal fuel lines connected with cloth braided fuel line at fuel rails and on the tank side with F.I. hose for the pre filter and relocated electric pump at tank height.

 

[KULTULZ]

Hi Kultulz!

External fuel pump, 12v, 30GPH about 32 psi. Pumping fuel fuel through fuel injection 5/16 hose all the way from the tank to the fuel rail.

The pump is installed incorrectly with no prefilter, pump mounted up in the hump above the fuel tank and has to pull fuel up then out to the injectors.

Will install soft metal fuel lines connected with cloth braided fuel line at fuel rails and fuel inj. Hose at tank, with pump relocated near axle.

They ran rubber hosing from the pump to the rail?

Here is some info to read on fuel line fabrication -

https://www.motortrend.com/how-to/easily-fabricate-brake-fuel-lines/

 

[Jwawhite]

Yes it's all F.I. rubber hose..

They installed the stock mustang fuel filter on the side rail a bit behind drivers door..canister type 4" diameter, 5" long? with what I think may be AN inlet and outlet?

 

[Daves55Sedan]

JW, you could easily go to a chain auto parts store and get a short length of 5/16" standard flared fuel line, say 6" long. Most chain stores now sell the copper flaired tubing also which is easier to bend. At one end of the tubing, bend a gooseneck shape into it so that it ultimately ends in a 90 degree bend. It will screw into the gas tank directly. Then turn the gooseneck straight to the right so that it is level with the bottom of the tank. At the end of the tubing, use a 5/16" inlet/outlet fuel filter like one that screws directly into a carburator, then install the electric fuel pump on it. Then use all new metal or copper 5/16 flared tubing from the pump to the engine. Use the very first hanger on the inside frame rail closest to the pump for hanging the metal fuel line.
The biggest problem is getting the new fuel line bent and above the driver side frame rail under the rear wheel well. Fomoco provided a notch in the bottom of the wheel well to permit poking the line thru to the outer side of the frame rail. Then you can use all the original style clips to hang the metal tubing to the outer driver side frame rail. These are still sold by Repo parts guys.
In doing this, you have a rigid, long lasting fuel line with the pump level at the bottom of the gas tank. Yes, the fuel line turns upward downstream of the pump, but the pump has a hard time sucking vacuum but is able to pump uphill easily.
That way, if you ever run out of gas, all you need to do is put gas in the gas tank to start the engine. But if the pump is installed elevated at the top of the floor bump-up, you would have air in the line ahead of the fuel pump. It would be necessary to prime the fuel line from the engine back to the pump, which means dis-assembly of the line at the engine and the need for rubber hoses, funnels, tin cans with a pouring spout and tools.

 

[Jwawhite]

Daves55Sedan

Interesting about the notch! Thank you!

 

[KULTULZ]

They used an EFI filter and nylon quick connectors? How did they retain the hose to the barbed fitting (I am afraid to ask)?

 

[5851a]

I've done one conversion to FI with all Ford parts. Went to Ford dealer bought couple rolls of the nylon tubing that they used from the factory back then. Placed it all with factory clips obtained from a salvage car. Factory Ford filter in the rear, swapped in a in tank pump and tank from later model. Marked and cut my lines and fittings, took the lines back out and the Ford garage used their special tool to install the fittings. The nylon is very easy to route, just have to keep it away from exhaust heat. The fittings are a pita to do without the tool.

 

[KULTULZ]

I've done one conversion to FI with all Ford parts. Went to Ford dealer bought couple rolls of the nylon tubing that they used from the factory back then.

The fittings are a pita to do without the tool.

That's the exact way I would do it myself. I was going to suggest it but feared the incoming ...

That line and fittings come in 5/16" and 3/8". I would use only FORD and not DORMAN.

 

[Jwawhite]

Kultulz, I understand your apprehension about asking! You must remember the compression fitting on the rear brake line....

They actually crimped the Ford connection to the rubber fuel line. The connector you posted is newer than mine, mine has the removable grey clip. The nipples on the filter, are they referred to as AN?

5851a I think I've seen what you're referring to and they sell a tool that presses the connector and line together. Do you prefer the nylon line over a metal line? Because it's easier to install? Daves55sedan referred to the softer metal line, on the Holley site that line appears to be easily malleable.

 

[KULTULZ]

Kultulz, I understand your apprehension about asking! You must remember the compression fitting on the rear brake line....

No, the CRS is getting louder ... ...

They actually crimped the Ford connection to the rubber fuel line.

The connector you posted is newer than mine, mine has the removable grey clip.

The nipples on the filter, are they referred to as AN?

I need to see that crimp. Did the previous owner do the conversion or was it a shop?

The one I showed also has the clip, just a slightly different style.

This should explain AN FITTINGS -

- https://www.fuelab.com/blog/underst...h-straight-thread-and-an-vs-tapered-thread/30

The flare you see on the filter are designed to hold the connector to the line once that clip is pressed down.

 

[Gene F]

That new Holley alloy fuel line looks interesting. That stuff they have started selling a few years back is hard to bend without putting a kink in it. And I have all kinds of tubing benders. Jegs sells something like it "NiCopp Tubing".

There used to be tubing benders that were basically springs you slipped over the tubing before bending, then slipped the spring off. Anyone know where I can find those?

 

[5851a]

Kultulz, I understand your apprehension about asking! You must remember the compression fitting on the rear brake line....

They actually crimped the Ford connection to the rubber fuel line. The connector you posted is newer than mine, mine has the removable grey clip. The nipples on the filter, are they referred to as AN?

5851a I think I've seen what you're referring to and they sell a tool that presses the connector and line together. Do you prefer the nylon line over a metal line? Because it's easier to install? Daves55sedan referred to the softer metal line, on the Holley site that line appears to be easily malleable.

Yes the Nylon is light weight and will never rust, easy to make adjustments. It looks a little sloppy compared to hard 90 degree bends of steel tubing but a little forethought it can work out. The tool is the key though, I watched them do it, it's like a Snap On version of a caulking gun with an attachment to hold the tubing in place. I tried following the Ford factory fitting instruction sheet about using boiling water and/heat gun. I failed miserably several times. Just figured let the pro's do the fittings. As a testament to the long life of the Nylon tubing, My post April 1967 Galaxie still has a factory installed Nylon fuel line. Technically I'm not sure if it's Nylon, but it's that black plastic stuff.

 

[KULTULZ]

To me, it is a toss-up as to whether Nicopp or nylon. Nicopp is available from quality vendors (HOLLEY - INLINE TUBING) and fittings and such should be readily available.

Then you need to figure how you are going to attach it to the frame rails and such.

Below is a photo of a fitting install tool -

FYI -

AEROMOTIVE specifies a 100-micron filter for the inlet side of an EFI pump. A micron is equal to 0.00039-inch, which means a 100 micron filter is capable of trapping debris that’s at least 0.039-inch in diameter and perhaps slightly smaller. This will prevent large foreign material from harming the pump. As the filter’s micron rating number becomes smaller (trapping finer particles) it also becomes more of a restriction. A 100 micron rating on the inlet side still filters large particles but is a minimal restriction.

On the high pressure side of the pump, the spec is far tighter to remove material that could foul a fuel injector. The AEROMOTIVE spec for this filter recommends 10 microns (0.0039-inch), a full 10 times finer than the inlet side.

 

[5851a]

Thats the tool.

 

[KULTULZ]

That's OTC. They make for FORD ROTUNDA also. ROTUNDA has a complete service kit incl the connectors. So does DORMAN but am leery of the quality.

Like you said, the line and connectors should still be available from FORD.

 

[KULTULZ]

If the 5.0L MPFI UPGRADE included a HI-PRESSURE FUEL PUMP, there should be no rubber line used in the system. The hose is not rated for high pressure.

CORRECTION -

There is now EFI rated fuel hose, GATES BARRICADE or HOLLEY VAPOR GUARD are two.

They actually crimped the Ford connection to the rubber fuel line. The connector you posted is newer than mine, mine has the removable grey clip.

The fitting I showed first has a crimp clamp to be used with the connector when using rubber line.

See ATTACHED for a further explanation. The connector does have the clip but the clamp is used in addition w rubber line. I don't think a worm clamp is approved as evidenced by your leak.

 

[Jwawhite]

Kultulz, remember the Compression Fitting I found on the rear brake line?
Just a few of the things I've found that weren't just quite right
And there is only one line at the Master Cylinder....