Stroker fuel injection - new fuel line?

[Murderthon9000]

I'm installing a 4.6 stroker in my 84 J10, which used to have a 4.2. The stroker is going to use the 4.0's fuel injection system, and I'm installing an E2000 pump so I need a fuel line that can handle the higher pressure and deliver the fuel I need.

Does anybody know if the stock fuel lines in the truck can handle the pressure and volume? I've been assuming so far that it won't, but i'd really like to save some more money.

Also, if I do have to install new fuel lines, does anybody have any guess as to how long the line will have to be?

Thanks gentlemen, I appreciate the help.

[babywag]

Stock steel lines can more than handle the pressure unless they're rotten.
Stock fuel hoses, not a chance.

You'll want to run a new return hard line @ 5/16", and up the supply line to 3/8" if it came w/ 5/16"?
I know the 4.2 in my dad's '79 had 3/8" supply line from tank already from factory, dunno if later years continued w/ larger line on 4.2(s)?
The v8's for whatever reason all seem to have come with 5/16 supply line from tank w/ exception of early 70's ones.

Easy way to see how long you need (hoses or hard lines) is simply run a string(then measure), then buy a couple extra feet.
Too many variables to just say buy x feet. Be sure to use fuel injection clamps and buy FI rated hose. Worm clamps are no-no, and FI is usually cheaper and in stock vs. old carb rated low pressure hose.
You can have parts store order 25' rolls of steel line pretty cheap in either 5/16" or 3/8" if needed. Some may stock it?

[Murderthon9000]

So i'll need to install a new line if it isn't already large enough? And the return line has to be 5/16 as well?

[babywag]

So i'll need to install a new line if it isn't already large enough? And the return line has to be 5/16 as well?

You don't HAVE to, but I would. 5/16" & 1/4" (if that's what yours has) is simply too small IMHO.
Pretty sure the XJ 4.0 fuel lines were 3/8" & 5/16"?

[Murderthon9000]

okie dokie, I guess I have some work ahead of me. Now if only I can convince myself that the extra work in forming a metal fuel line is worth it. I keep thinking about 225 psi fuel hose.

Thanks babywag

[babywag]

It's not too bad, pull old and one use as a pattern.

[JeepsAndGuns]

The factory fuel lines on my 4.0 YJ are 5/16 feed and return. All the other 4.0's I have seen have been the same.

[babywag]

Well my memory isn't great lol.
I believe in bigger is better with fuel lines and FI.
I'd rather have the 3/8" lines to start with, than later realize 5/16" isn't cutting it.

[Gulrok]

5/16 should support a v8 up to about.. 350ish in horse power running a mechanical fuel pump (and carb)..

I'm sure your vehicle will be more than capable of fuel delivery with 5/16 lines, as long as you have a well equipped fuel pump. ( Might I suggest a Holly pump. )

You shouldn't ever see an issue. Replace lines with Steel or NiCopp.

[babywag]

5/16 should support a v8 up to about.. 350ish in horse power running a mechanical fuel pump (and carb)..

I'm sure your vehicle will be more than capable of fuel delivery with 5/16 lines, as long as you have a well equipped fuel pump. ( Might I suggest a Holly pump. )

You shouldn't ever see an issue. Replace lines with Steel or NiCopp.

Being how the thread is in the fuel injection forum might be a hint...?
no mechanical pump he's using an e2000 FI pump
no carb, he's got a 4.6 stroker and using 4.0 fuel injection system.

[Nikkormat]

Nylon fuel line cheap and effective. There's a reason nearly every OEM has switched. You can buy it in bulk rolls on Amazon or from Dorman through your local parts store.