Can't find any specific measurements or lengths of the complete fuel line system.
I'm planning on ordering -10 A/N teflon stainless steel fuel lines to complete my fuel system rebuild.....

DOES 40 feet sound like enough for two tanks and the return lines??

the PTFE line is supposed to be good stuff but before i order...any one had any problems?

 

40' should be enough for single cab 55' for 4 door

 

Thanks IDI Guy
--I'm gonna go with 60' for the super cab and that should be enough for the return lines too im hoping.

I've recently read some things about the routing for the injectors and it seems that the two parts to the conversation are that deleting and plugging the fuel filter return line is done. The second part being that the routing to the injectors for air bleeding off the injector pump and fuel filter is changed to something same or similar to the NA 7.3 IDI.


I'm just wondering if it would be more intelligent to delete the mechanical fuel pump, install an electric that pushes 6-9 psi with 30-37 gph, redo all the lines with two filters: one prefilter with water separator after the tank selector, before the pump, then pump to stock filter.
Delete the filter return line, new fuel line throughout and map out the lines so that there is only #7 @ dead head.
I have a banks 3" downpipe and am waiting to weld on and build 8" stacks in the bed.
This is a work truck not a racer and im looking for optimal longevity....the thought is to add a new 2.5" aluminum radiator with 4x 14" electric fans, also, an air cleaner turbo box delete with a hoood ram air induction into a custom box that has a 14" blower fan into two side by side stock air cleaner filters with a 14" fan sucking housed in a box and piped to the intake. Truck should breath great, stay cold as possible and have a reliable and clean fuel source.

all of my old tanks were garbage, and rust is in the lines yet it starts and run great as is.

All the help and advice is much appreciated. Believe me.
I've still got time to plan before i do something stupid...

 

thats a lot of dough to spend on fuelline. Teflon is awesome though.

 

My 88 has teflon lines, I didn't buy them, and it is one less thing to worry about as far as the air intrusion goes.

 

PTFE (teflon) will not survive petroleum use.

-Enjoy
fh : )_~

 

The front fuel tank is made from ptfe

 

I just looked up the Chemical Resistance of PTFE and it shows: Excellent for use with Fuel Oils, Gasoline and Kerosene.

Yet, in the Fuel Oil plumbing world PTFE or Teflon is not acceptable for use. (According to the local Fuel Oil Supplier) Recently I moved my heating oil tank and re-worked the whole system, they had to come inspect before filling the tank, they failed it because of PTFE dope use stating Petroleum products dissolve PTFE.

I did a test ... I applied PTFE dope to a joint and submerged it into K1 ... About two weeks later the PTFE dope was mostly gone, what was left was a slimy goo.

I have been using PTFE/Teflon for thread sealant for many many years, I always wondered why I could not keep some things sealed ... They were petroleum related.

So now I really wonder the facts of the matter.

-Enjoy
fh : )_~

 

Yeah I haven't had any confidence in ptfe pipe tape for fuel related aplications but haven't had anyproblem with it for fuel tanks there must be a diferance in the chemical resistance of the two products

 

I've heard the same from marine applications...the tapes and liquids dissolve and goo out but the solid polymer??? That is bulletproof.

 

PTFE tape is NOT a sealant. Its purpose on NPT threads is as a lubricant. As Teflon is slick, it reduces the friction between the threads in a tapered joint. Less frictions means its easier to tighten the joint until the tapered threads jam together and make the actual seal.

Ever notice how when you take apart a joint where Teflon tape was used, the tape basically disintegrated? It squishes out of the way while the joint is tightened. Pipe dopes tend to stick in the threads and stay there when the joint is taken apart.

Depending on the compound, some PTFE based pipe dopes can be used as sealants on petroleum fittings. Some are rated for only water and air uses.