Fuel line recommendations...

[parsonsj]

Steel, stainless-steel, aluminum, nicopp. Other than the obvious strength differences between them, why would one be preferred over the other? Do any of them have certain fuel restrictions?

I've used all those materials. All will work fine.

• I prefer nicopp: it's easy to work, and bends and flares easily. It comes in rolls, so you have to work a bit to make the straight sections "straight". Still, I don't use anything else anymore.
• Aluminum comes in several alloys and stiffness, from the completely annealed rolls you get from Summit/Jegs to the very stiff sticks you can get from McMaster-Carr. I've had success with all of them, and prefer to start with the straight versions.
• Steel rusts, so you need to paint it or coat it after it's been bent to shape.
• Stainless looks nice but is a real bitch to flare, and often cracks at the flares when used for brake lines. It tends to seep through flares in general too.