I am running pretty much all new lines on my truck while it is apart. Is there any reason to run larger lines from the actual fuel tank, or is that a waste of time? I want this truck to be setup good before it goes back together. So I will have a bunch of questions, some probably dumb to most and if they are please someone let me know. Thanks

 

I would run a larger line so when you start adding fuel you will not have to put larger lines on later when your all together and driving it. it wont hurt to upgrade them now.

 

Any advice on line size?

 

I think??? factory size is 5/16 draw-lines and 1/4 returns.

I would upgrade to at least 3/8 both ways, 1/2 if you have big plans.

 

I would go 3/8 lines. you could go 1/2 but i think that would be unnessesary unless you have a HUGE wallet to flow that much cash through those lines (diesel fuel)

 

I do drive this truck quite a bit. I would like to be well into the 400hp range someday. I realize it takes a bit and it is a 2wd truck. It's kind of a toy but driven enough to be considered a daily. I would however like to hit the 1/4 a couple times to see what it does and have the power to peddle up hills with a loaded trailer with no problem. So I was just thinking to upgrade where need be and with the bed off thought to be a good time to do the fuel supply. Thanks for the help guys, it is greatly appreciated. Anymore advice or anyone else who wants to chime in feel free.

 

My crew cab I went 3/8" supply and 1/4" return. Spend the money on the supply line, but save on the return. My 'competition' trucks, one has 1/2" and the other 5/8", both use the stock return line.

 

Take a look at the write-up in the sticky. He did a great job explaining the big line swap.

 

i would go with a little larger return also it helps keep the volume of fuel moving so new fuel can get into the pump and lubricate. im enlarging my return port so i dont eat up more cam rolers

 

I totally agree with your reasoning; BUT, I have read that the tinyness of the return port has something to do with maintaining case-pressure, and that monkeying around with the size of that tiny hole will have adverse effects on the performance of the pump.


I would also like to have more return volume; go ahead and drill yours and get back to us.


My three fuel-tanks are plumbed such that I can draw from any of the three and return to any of the three.

When I had the Stanadyne-pumped International 6.9, the fuel return would fill a twenty-gallon tank in thirty miles; with the VE, it will barely accomplish the same in a hundred-thirty miles.

 

Also been toying with the idea of twins, so this would probably only help, right?