2 Micron filter post stock filter

[bmallen]

I wanted better filtration so I borrowed an idea from "Superduty" on another forum and made it fit my truck. I had to come up with a way to mount it to the linkage bracket since the area below it was about the only place with enough room to mount the filter and it's mounting plate.



I used a piece of 1/8'' plate steel and mounted one bolt through a hole in the linkage bracket and into the filter mount. This ended up being suprisingly solid. The filter and it's mount are both Fleetguards.



I also mounted a fuel pressure gauge on the output side of the filter. With the Walbro pump, I'm getting 18-20 psi to the CP3.

__________________

 

[JStieger]

bmallen-



Cool! I now have all the parts to do my Walbro mod also, but waiting for the weather to get better. However, I was still struggling on where to mount my Racor 2 micron filter post stock filter. Now I have to check out the area you used! The Racor mount is a right angle mount with 2-bolts and you only used 1 out of 4 Fleetguard mount holes if I understood your description correctly. How much room do you have to access your filter for changing?



I also saw the Superduty pictures and liked where he mounted his under the intake horn on his Cummins repower. Unfortunately we have the APPS in the way!

 

[rbattelle]

Nice job, bmallen. But looks like a real pain to change filters or drain the separator...



-Ryan

 

[TCDiesel]

The CP3 dosen"t care about pressure,It volume that counts,That must be one robust pump thru a 2mic, I have seen the CP3 pull 25psi to 0, I don't think any CP3 will survive with a 2mic before it,outside of having a hell-ova pump installed.

 

[JStieger]

The CP3 dosen"t care about pressure,It volume that counts,That must be one robust pump thru a 2mic, I have seen the CP3 pull 25psi to 0, I don't think any CP3 will survive with a 2mic before it,outside of having a hell-ova pump installed.

Ryan above is doing the 2 stage filtration with a simple Holley Blue and I believe an Aeromotive before that with great success.



The idea of using the Walbro or equivalent is to have a pump that is basically not running at 100%, 100% of the time because we BOMBers just can't leave well enough alone!

 

[TCDiesel]

Ryan above is doing the 2 stage filtration with a simple Holley Blue and I believe an Aeromotive before that with great success.



The idea of using the Walbro or equivalent is to have a pump that is basically not running at 100%, 100% of the time because we BOMBers just can't leave well enough alone!

So if I understand this correctly the system is independent and not put of the injection system, That"s a great idea.

 

[rbattelle]

Actually, I'm not running the Aeromotive pump anymore. I was using the Aeromotive 11203 with pulse-width modulation to drop pressure down to 11-13 psi at the CP-3, but the 11203 is not compatible with diesel so it blew a seal after about 4 months. I swapped over to a Holley blue because the flow rate and pressure more closely match what I think the CP-3 wants without the need for the pulse-width modulation controller.



I run the stock fuel filter AND a 2-micron Stanadyne filter, with the 2-micron filter sitting between the stock canister and the CP-3. Fuel pressure is monitored at the exit of the 2-micron filter.



bmallen - how is it you have a 2004. 5 truck with a TPS from a very early 2003 truck?



-Ryan

 

[JStieger]

So if I understand this correctly the system is independent and not put of the injection system, That is a great idea.

Boils down to replacing the stock lift pump with a pump (Walbro or equivalent) that can put out a lot of pressure if made to via a regulator or bypass line. You set the bypass line or regulator at the CP3 to maintain a certain pressure at the CP3. The CP3 feed then sees all the volume the pump puts out, which is more than enough than what it needs and whatever fuel is not used is returned back to the tank. By regulating the fuel pressure via a return line, the pump runs at a lot less than 100% of its highest pressure output, i. e. , just loafing along.



Check out this site:



http://common-sense-diesel.blogspot.com/





It has tons of pictures and links to wade through. Links within have lots of heated :-{} , but lots of good stuff to digest if you take the time and overlook the various personalities involved.



The typical arguments against it are:



1) unproven in Cummins application

2) why do it if my stock relocated lift pump or Holley or Carter been running fine for X miles

 

[abdiver]

Why not just install and air dog or Fass system?

 

[rbattelle]

Why not just install and air dog or Fass system?

Some of us are crazy enough to think we can build a system that's (at least in some ways) better than FASS or Airdog. For example, I have not wasted my stock filter canister, water separator, or heating element by bypassing them as most people do with FASS or Airdog.



I think of it the same way I think of computers: you can buy one from Dell and get a very nice unit that works great right out of the box, or you can build your own, have fun doing it, and end up with a higher-performance system that's fully upgradeable down the road and has everything precisely to your own personal specifications.



-Ryan

 

[JStieger]

Ditto on what Ryan said!

 

[klenger]

I like Dell computers and my truck is stock. I think you're on to something.

 

[bmallen]

But looks like a real pain to change filters or drain the separator... bmallen - how is it you have a 2004. 5 truck with a TPS from a very early 2003 truck?

It's not too bad. I pull it out from the front and just have to weave it through the hoses. Not any harder than the factory filter.

The way I understand it, the automatics in 04. 5 had the older TPS but the manuals did not.

... you only used 1 out of 4 Fleetguard mount holes if I understood your description correctly.

That's correct. I used lock washers to keep it tight on the mount. It's very sturdy.

Why not just install and air dog or Fass system?

I have $250 into the Walbro system and about $35 into the filter. The Walbro is an EFI fuel cooled pump running at 25% capacity. The FASS pump is air cooled.



Because of the pressure that the Walbro puts out, a bypass or regulator is needed. I used a bypass on the CP3. The picture is below. The beauty of this is that the CP3 gets all the fuel it needs.

 

[Matt S]

I used a bypass on the CP3. The picture is below.

Do you also run a fuel pressure gauge? I have my pressure gauge right where your bypass is.

 

[bmallen]

The gauge is on the output line of the 2 micron filter before the CP3. There's a picture in my first post.

 

[Matt S]

The gauge is on the output line of the 2 micron filter before the CP3. There's a picture in my first post.

I can't believe I missed that. Is it a T off the outlet of the 2 micron filter?

 

[bmallen]

Yep. A tee to a reducer to 1/8 npt. When I finally get an in-cab gauge I'll hook it to that.

 

[TCluff]

QUESTION FOR YOU GUYS MODDING YOUR FUEL SYSTEM, ARE YOUR FILTERS 2=MICRON OR 2=MICRON ABSOLUTE FILTERS,

 

[rbattelle]

Stanadyne says my filter is 2 micron at 98% efficiency.



-Ryan

 

[Tinman]

What kind of pump(s) would you need to get adequate flow/pressure to the cp3 if you used the STanadyne FM1000??