I want to make a custom set of fuel lines so i have room to fab a diferent intake manifold.

what type of lines are used Size, type of metal etc.
What fittings are used on the end?
On a vp44 truck do the lines have to be the same length?
are custom lines bent up by hand with tube benders or a different method?
any info would be great thanks.

 

i dont know what material or sizes but the lines have to be all the same length or you have injection time issues, because the fuel will travel to the cylinder with short lines faster than long lines. the long lines will be injecting the same time the short lines are ie 5 and 2 are next to eachother in the firing order

 

My lines are just mild steel, but you can get them in stainless as well. Fittings are a tapered end, similar to a AN/JIC and a compression fitting, but yet quite different. I think they would be specific to injection lines. All my lines were done with tubing benders, you can see where they marked the lines to do the bend.

When I had a leaky line, I talked to GCL in Calgary, and the have a place in BC that does custom lines. You could try calling GCL, or Peak, to find out what shop it is, maybe they will sell you some unbent lines with the proper fittings on them

 

got it thanks tate so far un bent lines run around 400 bucks going to hold off on that

 

liquid is incompressible. Therefore I am having a very hard time trying to grasp why the lines would need to be equal length to avoid timing problems......

Someone enlighten me....

 

Liquids do compress, but very little. In out hydraulics class, they said that for every 1000psi, the fluid would compress 1%. I don't know what the ratio would be on diesel fuel. But we are dealing with pressures upwards of 16k psi, so there will be some compression in there.

 

Hoop stress on the injector lines give up the "compression" of the fluid. At 19,000 psi, the line are actually pulsing with the fuel charge in them. Longer lines give more surface area to "stretch" and delay timing to longer distances from the pump.