Fuel line

[Riveted1]

I know there will be lots of different opinions here, but I wanted to see what the majority thought. I'm about to plumb the fuel lines for the new under bed fuel tank. I plan on running rubber fuel line from the fuel pump to the frame and then a steel line back to the tank. Now would you guys just go straight to the tank w/the steel line or use another section of rubber hose from the frame to the tank?

[70rs/ss]

From the tank, you should run metal because the fittings on the sending unit are threaded on a stock type tank, but towards the frame a short piece of rubber hose is a good idea to allow for movement and vibration over time and then the bit of rubber from the frame to the pump is good idea as well. I usually buy the expensive EFI high pressure hose as it is thicker and does not kink as easy as regular fuel hose. If you can afford the extra $$$, go to Loper's and buy a few feet of braided hose (Nylon wrapped Russel hose is great and comes in black for that extra bit of durability and piece of mind that the rubber hose is going to work and not fail).

[tobiahr]

an additional section of rubber line from frame to tank. i ran a hard line to the tank from the frame and got stress cracks after about a year. had to remove the bed to replace the line. not a lot of fun. looking back the only way to avoid the stress cracks would have been to hard mount the tank instaed of using hangers but then would have possibly cracked the tank with frame flex.

[ChevLoRay]

I think that a rigid line (steel) along the frame is the way to go, with rubber (?) section between the tank and the hard line and at the end of hard line to the fuel pump, if yours is still mechanical.

[steelhorse]

New cars and trucks use a piece of rubber/flexible hose at the tank so it can be removed and for vibration issues.If its good enough for them then it works for me.On a side note some places can make you a hose with crimped on fittings like the factory uses so you dont have to worry about clamps coming loose.

[myoldchevytruck]

Originally Posted by ChevLoRay

I think that a rigid line (steel) along the frame is the way to go, with rubber (?) section between the tank and the hard line and at the end of hard line to the fuel pump, if yours is still mechanical.

ChevLoRay, I agree with you on the hard line along the frame rail and a section between the tank and the frame to the hard line (I would use steel braided line) But I would not run a hard line to the mechanical fuel pump because although the motor is mounted to the frame, that motor when rev'd still is going to flex, therefore, that hard line will eventually do the following: bend, kink, leak to name a few. I just relined my behind the seat tank and used steel braided line sections from the cab to the frame and from the frame to mechanical fuel pump to allow for flexing and used hard line in the middle of it all.