Lower fuel line questions (under tank) Options

[DC_neun_vierzehn]

Looking for help regarding correct fuel lines while I await a new Dansk tank to replace the unusable one I received (thread here).

I have a '73 2.0. A PO moved the fuel pump up front and under the tank and cut out a door so that the fuel pump can be accessed from the frunk (like the '75 and '76).

First question: regarding the send and return pipes on the bottom of the tank - the send line measures at 10 mm and the return at 8 mm, yet the list in the AA fuel line kit lists both lines as 7 mm. Is that correct? I didn't want to force it, but I cannot seem to get the 7 mm line in the kit over that 10 mm pipe.

Here are pics of the pipes I'm speaking of as well as pics of what the lines were when I removed the old tank (a 5/16 AKA 7.9 mm USA made line on the send and a 7 x 3 made in Germany line on the return).

[rjames]

Do early tanks have two different size lines coming off of the tank?

The send/return lines on my '75 tank are the same 8mm (OD).
I would replace the 10mm fitting on your tank with an 8mm one.
What Chris9146 said is how it should be set up. On my fuel filter there is an arrow indicating fuel flow direction. If yours doesn't have that, then it probably doesn't matter which way you connect it.

I would also recommend Gates 3014 T2 fuel line. It's rated for ethanol and 225PSI, so safe for FI. Pricey, but better safe than sorry. I was able to buy it from my local NAPA store.

[DC_neun_vierzehn]

Do early tanks have two different size lines coming off of the tank?

The send/return lines on my '75 tank are the same 8mm (OD).
I would replace the 10mm fitting on your tank with an 8mm one.
What Chris9146 said is how it should be set up. On my fuel filter there is an arrow indicating fuel flow direction. If yours doesn't have that, then it probably doesn't matter which way you connect it.

I would also recommend Gates 3014 T2 fuel line. It's rated for ethanol and 225PSI, so safe for FI. Pricey, but better safe than sorry. I was able to buy it from my local NAPA store.

Why - what is the benefit of converting the original 10mm send pipe on my tank to an 8mm other than more hose options?

Because I believe I already have that figured out - use a 9mm hose from the 10mm tank pipe to a Tangerine Racing reducer/adapter (9.5mm to 8mm) then a 7mm hose to the 8mm inlet on the filter.

From what I can tell that should work. Hoses should be .5mm to 1mm smaller than the fitting.

[rjames]

Do early tanks have two different size lines coming off of the tank?

The send/return lines on my '75 tank are the same 8mm (OD).
I would replace the 10mm fitting on your tank with an 8mm one.
What Chris9146 said is how it should be set up. On my fuel filter there is an arrow indicating fuel flow direction. If yours doesn't have that, then it probably doesn't matter which way you connect it.

I would also recommend Gates 3014 T2 fuel line. It's rated for ethanol and 225PSI, so safe for FI. Pricey, but better safe than sorry. I was able to buy it from my local NAPA store.

Why - what is the benefit of converting the original 10mm send pipe on my tank to an 8mm other than more hose options?

Because I believe I already have that figured out - use a 9mm hose from the 10mm tank pipe to a Tangerine Racing reducer/adapter (9.5mm to 8mm) then a 7mm hose to the 8mm inlet on the filter.

From what I can tell that should work. Hoses should be .5mm to 1mm smaller than the fitting.

If you already have an adapter, then yes, no reason to change anything other than to reduce possible failure points. I was trying to address your question 'what line to use that goes from the 10mm tank pipe to the 8mm filter inlet'. You didn't mention you had an adapter until your last post.