Thread: Fuel Line

Have you wound multiple turns into the solid fuel line at the flex point to allow movement?

Aaron

Originally Posted by Aaron IIA

Have you wound multiple turns into the solid fuel line at the flex point to allow movement?

Aaron

Hello Aaron,

Thank you for the reply. That is a good point!

No, I have not bent the fuel line up as yet. How many coils around would it need?

Kind Regards
Lionel

If I were doing it, I would probably use about four turns, with about a four inch diameter. That said, flexible rubber fuel line is now easily and cheaply available. If using rubber fuel line without proper hose barbs, I would probably slightly flare the ends of the solid line to aid in retention of the flexible line.
Does your car have a carburettor of EFI system?
Are you using copper pipe or brake line for the solid fuel line?

Aaron

Originally Posted by Aaron IIA

If I were doing it, I would probably use about four turns, with about a four inch diameter. That said, flexible rubber fuel line is now easily and cheaply available. If using rubber fuel line without proper hose barbs, I would probably slightly flare the ends of the solid line to aid in retention of the flexible line.
Does your car have a carburettor of EFI system?
Are you using copper pipe or brake line for the solid fuel line?

Aaron

Hello Aaron,

It is a carburettor for a HQ Holden 202 cubic inches pre-pollution motor in a Series III. The fuel line is painted/coated steel pipe.

I have used proper barbed fittings to connect the pipe to the original type of solid state cylindrical fuel pump. It has the black plastic fuel lines running from the petrol tank and then along the chassis rails to the engine bay.

Anyway, Aaron you have answered my question about needing some feature to allow for flexibility and movement between the engine and the firewall.

Kind Regards
Lionel

Reasons for my questions. Copper is more likely to work harden and develop a fatigue crack. Steel is better. EFI fuel pumps operate at a higher pressure, so need a higher specification flexible fuel line. Seeing as you have a SU fuel pump (which incidentally is not solid state) that only develops around 1-3psi, ordinary, but rated, flexible fuel hose will be your best option.

Aaron