Adding Primary Fuel Filtration

[CapnDean]

New to the Dmax. Not new to diesel engines. Surprised that my truck only has one filter.

On every boat I have skippered we have multiple filtration prior to being fed to the injectors. In general we would have a primary filter that would be say a 30 micron filter - - on up to a secondary filter that was 2 microns.

In one application we had a pair of Gulf Coast filters (Paper towel filters) that our fuel passed through before getting burned. Never a dirty fuel or a water issue with a pair of these.

I would like to add a filter inbetween the tank and the engine. Yet not willing to spend the 500 bills for a FASS system. I am sure I have a couple of housings available that I could mount under the frame rail.

What size fuel hose does the Dmax require in order to get sufficient fuel flow?

Would I need to add a small lift pump to keep from making life tough on my injector pump?

Has anyone created their own extra filter setup yet?

[dieselnuts6]

There are plenty of ways to do so. Those of us that haven't yet installed a lift pump but still want the extra filtration are using an adapter that enables the use of a CAT 2 micron filter in place of the stocker.


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[CapnDean]

Already ordered that from Alligator..... I just want something else in the line before it gets to the cat filter. Just cause that is what I am used to -- Security.

[Sroufe7]

Nictane Auxiliary Filter Kit

[kbbingham]

Here is a decent parts list. I'll be doing something similar.

Holly Fuel pump and cat filter DIY

[kbbingham]

check out the " Do it yourself section."

How To's, DIY and Write ups - Chevy and GMC Duramax Diesel Forum

[CapnDean]

Great write up! That is right on what I was looking at doing! I do have a few questions for you if you get a chance.

1) Why the Holley 150 pump? Isnt that a bit of overkill? (Wouldnt 10 do the job?)
2) does the regulator kick that pump on and off a bunch?
3) will the factory injector pump pull through this setup with the Holley pump dead?
4) Priming/bleeding: do you open the bleed screw and cycle the holley until you get fuel?

I like the way you think!

If a diesel wont run....it's fuel.

[Blackcloud556]

Id get a raptor pump over the holly.

I have not heard of people having much luck with the blue pumps

[CapnDean]

Suppose I take an standard 12v lift pump (like we have on 6.2 diesel in boat as a priming pump) Break the line and stick in a DDC sock filter on the suction side and have it feed the beast.

I know that this style pump will flow enough fuel in the OFF position to run a 6.2 at max rpm continuous.


TankxxxxxxSockFilterxxxxxxxx12V10PSIxxxxxxxCATFILT ERxxxxxxCP3

Of course in this application I would wire the pump into the run circuit - - -The idea is to get additional filtration/water separation. I am not needing more fuel pressure to turn and burn or to tune (or for an sake SMOKE).... Just want to have better filtration without sucking the life out of my injection pump, or sucking the life out of my wallet for airdog or FASS.

[SST 1953]

The problem with that is going to be if it quits, can you pull through that pump with a sock on it? You won't pull through the Holley. The Holley also has orific's smaller that the fuel lines, so your pressure will be ok but your volume isn't. Plug your nose and breathe through a straw, now you know what your fuel system will feel like, extremely hard on the CP3. Your better off without the Holley, but if you want a pump like that go with a Mallory 140.