Engine/Transmission (1998.5 - 2002) big lines

[TIngram]

is it worth the time and trouble or money to put big lines and banjos on from the filter to the injection pump? is there any one that sells this as a kit, just trying to get a little more out of the beast. thanks for the help

 

[darkhorse]

is it worth the time and trouble or money to put big lines and banjos on from the filter to the injection pump? is there any one that sells this as a kit, just trying to get a little more out of the beast. thanks for the help

An 8 AN line from filter to VP44 made a big difference on my truck when I had the stock lift pump. Vulcan & several others sell good kits. Geno's has them. VULCAN PERFORMANCE - FILTER TO INJ PUMP HOSE KIT 98. 5-07 5. 0-Dodge Cummins and Ford Power Stroke Diesel Truck Accessories - Geno's Garage

 

[KKohagen]

I originally put in the Vulcan Big Line Kit (before Geno's sold it) with the relocated lift pump near the tank. This included a 1/2" line from the pump to the stock filter housing and then also from the filter housing to the VP-44, the inlet elbow is where I get the press. reading for for my gauge.
I used the original pump and then one of the campaign pumps after installing the Big-Line Kit. I had 10. 5 - 12 when I originally installed the campaign pump. I then had pressure issues recently and replaced the whole system with an Air Dog. The pressure started to go south and I chose the once and for all solution.
Now I have 15. 5-16 pounds at the VP-44, all 8-AN fittings (JIC). Even at WOT my pressure stays steady at 15. 5-16 pounds.
I looked at the Airtex pump from Autozone before deciding on the Air Dog. The built-in fitting were the stock kind and I did not want to get fittings to make it work. I got some unexpected $$ to pay for the Air Dog and voila.
After reading many posts over the last few years and lots of research. I would say "YES" to your answer of if it will help, anytime you can remove a restriction, such as the stock line from the filter to the VP, helps. Especially with the mods you have.

 

[Bob Cochran]

Almost exactly happened and what I did. I AGREE!!!

I originally put in the Vulcan Big Line Kit (before Geno's sold it) with the relocated lift pump near the tank. This included a 1/2" line from the pump to the stock filter housing and then also from the filter housing to the VP-44, the inlet elbow is where I get the press. reading for for my gauge.

I used the original pump and then one of the campaign pumps after installing the Big-Line Kit. I had 10. 5 - 12 when I originally installed the campaign pump. I then had pressure issues recently and replaced the whole system with an Air Dog. The pressure started to go south and I chose the once and for all solution.

Now I have 15. 5-16 pounds at the VP-44, all 8-AN fittings (JIC). Even at WOT my pressure stays steady at 15. 5-16 pounds.

I looked at the Airtex pump from Autozone before deciding on the Air Dog. The built-in fitting were the stock kind and I did not want to get fittings to make it work. I got some unexpected $$ to pay for the Air Dog and voila.

After reading many posts over the last few years and lots of research. I would say "YES" to your answer of if it will help, anytime you can remove a restriction, such as the stock line from the filter to the VP, helps. Especially with the mods you have.

 

[Joe Mc]

I went through serveral mods before settleing in on the Glacier - 392 system w/big lines and the Vulcan draw straw. There are many out there, but the system I chose met both my financial and performance needs. Regardless of throttle position I'm seeing 22#.

 

[JPulliam]

I put a FASS HPFP on mine with the 3/8" line FASS provides and had 15 psi at idle and 14 psi WOT. Thinking I had a fuel suction problem I replaced the pick up with a Draw Straw, and a big line kit from the filter to the pump, just for good measure. Now, I see 15-16 psi at idle, and WOT with the COMP set to kill I see 12 psi minimum. I need to do the test again with out the COMP to see what changed on injectors only, though. I know the FASS had not changed when I installed the big lines, so I can say reduced pressure from bigger lines equals more flow. Pressure is nothing without flow IMHO for these pumps. They are cooled and lubed by fuel, so more flow would be beneficial while keeping pressure at an acceptable level.

 

[BDaugherty]

The "big line" kits are popular and for good reason. My opinion is that if you are going for big horsepower, you need big lines. I consider "big HP" to be box, injectors, and turbo. If you are just adding a box, then a upgraded lift pump and high flow banjo bolts will suffice. In either case, a fuel psi gauge is a very good addition to ANY VP44 truck.

Personal experience: My buddy bought a '00 2500 auto truck. He added the low fuel psi light. (comes on at 5 psi) Stock engine and lift pump: light would come on under full load conditions. Adding a Holley "blue" pump caused the light to flicker at full load. Adding high flow banjo bolts from City Diesel kept the light off at all times. He later added a SuperChips programmer (about 90 HP) without tripping the low fuel psi light.

I'm running a Walbro 392 with big lines all the way to the VP44. I've had no problems out of it so far. I'm not using a draw straw.

 

[jkidd]

big fuel line is sufficient up to 350-400HP. if you plan on doing more HP you will want to upgrade your pump to a fass, airdog, raptor or similar.

 

[2broke2smoke]

i've got a big line kit and a vulcan relocation kit and i see 15 psi at idle and 8 psi at 500ish on the dyno with the stock carter (program)

 

[NoSeeUm]

Yes here also. I very worth while modification.



Jim

 

[JPulliam]

UPDATE: With injectors only I see 14 psi min. at WOT.