93flatbed

I see that some guys are runnin 1/2" fuel feed line, tank to pump. Here is my ?'s,
what is the return size? When you do it are you making all new lines out of metal pipe, or are you just putting in rubber hose?

How are you getting it from the tank, are you just going off the sending unit or are you drilling it out and droping 1/2" straw in the bottom.

And the big line kit I've seen guys saying they have, where do you get a set from, or do you need to make a set your self, if so what size lines do you run.

I understand they all have to equal lenght?

Thanks in advance
Justin

BearKiller

Here is one source for a "big line kit" :


http://www.glacierdieselpower.com/pr...?pf_id=9852BLK


Note that this only gets you from filter to injector-pump and it will require a second kit, plus a 14mm JIC adaptor to go from lift-pump to filter.

Here is another supplier for kits, straws, and such :


http://www.vulcanperformance.com/ser...2%84%A2/Detail


And, if you want to save a bundle and build your own system, these guys have everywhere I have looked beat by a long mile :


http://www.discounthydraulichose.com...068-parent.htm



You will need 12x1.5 metric/JIC adapters at three locations and, depending on which specific lift-pump you have, either one or two 14x1.5 metric/JIC adapters and maybe a JIC X 1/4NPT MALE at the lift-pump inlet.

I have seen them both ways at the inlet and it is hard to determine just which it is, as the 1/4NPT will thread easily into the straight cut 14x1.5 metric hole.

If the area surrounding the hole looks like "face seal", then it probably is the Metric, instead of the NPT.


BC847, or however he spells it, has an excellent pictorial in the sticky on installing big fuel-lines into the tank unit.

BearKiller

what is the return size?

Factory draw is 5/16 and return is 1/4

When you do it are you making all new lines out of metal pipe, or are you just putting in rubber hose?Most are running quality rubber.



I understand they all have to equal lenght?Not sure what you mean ???

Trebor

Looks like Dodge used different sizes on mine. Both pieces of my tubing outside diameters measured .312" This was measured at mid points of the entire tubing length. The supply side inlet and outlets were expanded to .375" but only on the ends. Of course this is on my 91.5 which sometimes doesn't follow what other models had installed.

BearKiller

It is possible that different year-models could have different line sizes.

93flatbed

Wow thanks for all of the info. By the same length line I ment that all of the lines from the IP to the injectors must be same length? I have heard that if you make them differant lengths it messes up the pulse put out by the IP? IDK just what I have heard?
Bearkiller you are the man thanks a bunch, guess what I've got in store for the next couple of weekends
Justin

BearKiller

If you don't know what you are doing, the steel injector-lines should not be altered, as they are very high pressure and I also have been told that the length should not be messed with.

wannadiesel

Yes, they all need to be the same length or the timing will vary from cylinder to cylinder.

93flatbed

So is this something guys are doing. By "big line kit" I thought guys were talkin about the lines from IP to injectors. Is it something that needs to be done when going big on the fuel? Or changing out to the big 435's, the way I understand it they are differant size lines? Or do they make an adaptor for our lines to those injector? Or am I way off base?
Thanks
Justin

bgilbert

You're way off base. You don't touch the hard metal injection lines - the ones between the injection pump and the injectors. You're only upgrading the fuel hose or tube between the fuel tank and lift pump.

93flatbed

Go it, thanks, so do 435's fit right in and lines screw right on?
Thanks
Justin

wannadiesel

Yes, no fuel line changes are needed to install 1st gen performance injectors.