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Old 04-13-2018, 04:05 PM   #1
85Misac10
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Fuel lines

Would it be safe to run all rubber hoses that are rated 245 psi instead of hard lines? I currently have tbi hard lines.

Thanks
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Old 04-15-2018, 11:22 AM   #2
andyh1956
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Re: Fuel lines

You gonna run Ethanol fuel in your truck?
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Old 04-15-2018, 08:19 PM   #3
85Misac10
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Re: Fuel lines

E-85 tune
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Old 04-15-2018, 09:16 PM   #4
Mattchu60
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Re: Fuel lines

I have the same question- thinking about dual tanks and LS swap - I know about the 65 psi selector valve thats out there, but what about the rest of the fuel system - only thing I can think of is running rubber lines everywhere.
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Old 04-16-2018, 12:37 AM   #5
hatzie
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Re: Fuel lines

If you intend to run E85 on a flex fuel LS then you should run Nylon and steel fuel lines. Rubber just isn't going to last and AN hoses aren't necessary anymore because there's Nylon line repair tooling and parts available now to Joe Q Public.

Dorman makes reasonable nylon fuel line and push-loc end fittings. You can find it on Amazon.

Tooling for Nylon lines is becoming more available. Again even on Amazon. Dorman 800-301, the compact KTI 75305, or the larger KTI 75300 to insert the female push lock sockets into your nylon fuel line. Folks have made some home brew tooling but the Dorman or KTI tools are less than $100 each.

The push lock steel tube ends can be formed using a Mastercool hydraulic flare tool with the GM fuel line dies to make the push lock tube ends. The Mastercool 72485 Universal Hydraulic Flare Tool set has push lock GM fuel line and transmission line forming dies along with Metric ISO bubble and 45° Metric and SAE double flares in a nice blow molded HDPE case. This is a very high quality professional grade tool with a pretty comprehensive die set that is well worth the $320 price tag. I own one and I would not like to go back to the cheap screw-thread tooling for brake, transmission, and fuel lines.
This Universal set doesn't seem to have the British 37° double flares so if you are working on antique British cars... Rolls Royce, Morgan, Austin Healey, Vauxhall, MG, or Bentley you may need to buy some additional dies. You'll also need Whitworth (British Standard) thread tools for those odd Brit bolts...
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1972 Ford F250 FE390, NP435/NP205
1976 Chevy K20, 6.5L, NV4500/NP208
1986 M1008 CUCV
2000 GMC C2500, TD6.5L, NV4500
2005 Chevy Silverado LS 2500HD 6.0L 4L80E/NP263
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RTFM... GM Parts Books, GM Schematics, GM service manuals, and GM training materials...Please include at least the year and model in your threads. It'll be easier to answer your questions.
And please let us know if and how your repairs were successful.

Last edited by hatzie; 04-16-2018 at 12:54 AM.
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Old 04-16-2018, 04:06 AM   #6
85Misac10
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Re: Fuel lines

Quote:
Originally Posted by Mattchu60 View Post
I have the same question- thinking about dual tanks and LS swap - I know about the 65 psi selector valve thats out there, but what about the rest of the fuel system - only thing I can think of is running rubber lines everywhere.
I am doing the dual tanks with selector.

I purchased the wiring harness from a member here “gmachinz”, top notch oe looking harness. The harness will allow dual walbro intank pumps.

Pollack Selector valve
87r10 donor tanks or new from rockauto
Two walbro 255 intank pumps or your preference
I will see what part numbers i used for sending units
Full deplete in cabin switch if yours does not
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