Fuel Line Plumbing

[parsonsj]

JP - -what types of flares have you done on the Cu/Ni alloy for fuel lines? 37deg? or do you do all double flare fittings?

I've done both AN single and 45 degree double (SAE) flares. Both are working fine.

[72BBSwinger]

I also had a talk with Aeromotive tech and they stated not to use hard line on a FI engine due to the pulsing of the injectors being heard through the hard line.. Anybody else have any info on this??

I would have to see that to believe it, I think if a guy used hard line along the frame and them hose from firewall forward it would isolate it? I have had experience with hard line rattling from a Holley Blue pump and I put a 2 foot piece of braided hose between it and the line and it was 99% gone.

[MikeMalibu]

I ran hard line from the tank to the EFI TB, except for short sections of flex. The injector pulsing was very noticeable. Then I replaced the hard line from the TB to the chassis with TechAFX hose. Toned down the noise about 50%. Next fix is pwm of the in-tank pump. If that doesn't work, then I'll run hose from tank to TB.

[72BBSwinger]

Me personally im going to just use braided PTFE front to back. Its way easier!

[Zachalanche]

Any one have experience using nylon tube (similar to OEM) I noticed it is available in up to 5/8". My initial thought is that it would hold up well to any type of fuel, and would probably outlast the car. only problem is I'm not sure which fittings work best with nylon tubing especially in a case where you may be using a fuel cell that has AN fittings. Seems like I see flexible line on a lot of cars for the entire system. is seems unnecessary to me.
Thoughts?

[dhutton]

You can buy nylon kits from Dorman and SUR&R. One potential issue is that it will kink if you try to bend it too tightly.

Don

[andrewb70]

I just made a quick video and I thought it would be appropriate for this thread.



Andrew

[PonchoJohn]

Thanks for the video, Andrew!
I needed to know that very info, and wanted to use CuNiFer tubing-- perfect!