Dual feed line kit for dual cp3's.

[mike diesel]

Got setup with a dual feed line kit last week and was curious what others had seen for improvements by running their cp3's this way.

Kit consists of a rail fitting and flexible high pressure line. So instead of feeding the driver side rail with both cp3's and then having 1 line split off to the passenger rail, which is also where the rail pressure sensor is...I now have the valley cp3 directly feeding the passenger rail and the top cp3 directly feeding the driver side rail while utilizing the original "splitting off" line as a balance line now.

The flexible line is very nice stuff and can be bent basically anyway you want. I went from the valley cp3, down under the y-bridge, back up and around the turbo and into the back of the passenger side rail. Worked out perfect. Have not had a chance to verify any rail pressure differences yet but so far I have notice increased throttle response and WOT feels stronger. Could just be the placebo affect though. Possibly hop on the dyno this week.

Figured I'd share incase others were looking for an alternative way of feeding the rails. This applies mainly to LLY's since I know lbz's rails are setup a little different. You can buy several different lengths of flexible lines also.

This bend here is about as tight as you can bend it.

 

[TheBac]

I like the fact that you use the original line as a balance. Who made the setup, Mike? Is this the II Cummins line or something else?

 

[Chevy1925]

Mike, where did you get that from??? i need the HP line from my dual fueler to the rail since i swapped to LLY stuff and i dont particually like how the PPE one is just "out there"

 

[mike diesel]

Tom, yes this is just a cummins setup from Industrial Injection.

James, industrial will have whatever you need.

 

[TheBac]

Very good to know. I wondered how that line worked on the Dmax. Nicely done.

 

[mike diesel]

Even if you have some old standard rail fittings laying around, the flexible line will work with them, saving you a few bucks by only needing to buy the flexible line instead of the kit.

 

[Tyler_LBZ]

Mine is set up similar but with the hard lines, valley CP3 feeds the driver side rail and the PPE pump feeds the passenger side rail. It's been working well on my truck for a long time. btw im using ported LLY fuel rails.

I do like the idea of using the flexible lines.

 

[Chevy1925]

How long is that line? I'll be calling them today as I need a weld on 3" oring v band flange too

 

[mike diesel]

Not sure how long the line is, might be hard to measure now lol. I'd guess it's about 24" long.

 

[Chevy1925]

thank you sir . what did you ask for when you went in there? i just dont wanna get too short a line :hug:

 

[mike diesel]

Well they don't really make a duramax specific kit, but he said if all I want is to feed the passenger side rail on its own, then the cummins dual feed line kit will work for lly's.

 

[duramaxzak]

The only down fall of the flexable lines from II is that the I.D. is smaller than the I.D. of the hard lines.

 

[Chevy1925]

Well they don't really make a duramax specific kit, but he said if all I want is to feed the passenger side rail on its own, then the cummins dual feed line kit will work for lly's.

got ya, that will work!

 

[mike diesel]

The only down fall of the flexable lines from II is that the I.D. is smaller than the I.D. of the hard lines.

Well considering that's all they use on their race truck, Baca's truck as well as every other cp3 setup they do, I don't think it hurts the HP department.

 

[duramaxzak]

Well considering that's all they use on their race truck, Baca's truck as well as every other cp3 setup they do, I don't think it hurts the HP department.

Not saying they don't work well, just stating a fact. I will be using one when I get my new intake.

 

[Chevy1925]

Mike, did you just buy the whole kit and use both fittings that came with it or just the line and some fittings you had? Been talking with them and waiting on a call back if they have the o ring v band flange im after

 

[mike diesel]

I just got the entire kit. The cp3 fitting it comes with is so you can have dual high pressure lines out of the cp3.

 

[Chevy1925]

I just got the entire kit. The cp3 fitting it comes with is so you can have dual high pressure lines out of the cp3.

ok cool. I was talking with jeremy there and they have no issue selling the line only. we are going to see if it will fit my rail fitting from PPE that came out of my lb7 rail. worse case i have to buy the fittings from them to bolt it all in.

 

[mike diesel]

ok cool. I was talking with jeremy there and they have no issue selling the line only. we are going to see if it will fit my rail fitting from PPE that came out of my lb7 rail. worse case i have to buy the fittings from them to bolt it all in.

It should fit just fine. It's just a standard end like all the other fittings. I know it works with a regular cp3 outlet.

 

[Chevy1925]

It should fit just fine. It's just a standard end like all the other fittings. I know it works with a regular cp3 outlet.

your thread came at the perfect time (thats what she said :rofl