Adding 2 micron filter/ nothing else ?

[TMoe]

OK, thought I would not touch the new 2006 truck but after reading injector issues and filtration threads I am thinking of adding a 2 micron filter after factory filter. So far GDP has a nice kit with a Fleetguard filter. Someone mentioned it only dropped 1/2 psi at pump with stock LP. Is that good and does it change with engine load? I have some additional questions.



The GM diesel doesn't have a lift pump. Is the GM inj pump different? What filtration spec does GM use and why didn't Dodge learn from GM mistakes? Are the Dodge injectors different? This all relates to the new 7 micron filter being called out in place of the old 10 micron filter and Bosch mentioning a 5 micron "absolute" recommendation.



If I research additional filters, such as those used at filling station pumps, what specs. do I need? Pressure drop at what flow? Absolute rating, etc. ? PSI rating? Trying to get smart on this.



The reason I ask is for minimal impact to flow I want minimal restriction and I don't want to add a different pump if I don't have to. There are some big 1 and 2 micron filters available from Cim Tek, 300BMG-02 specs are 25 gpm maximum flow, 50 psi maximum working pressure, 2 micron Microglass media compatible with bio–fuels. I am sure there are several similar filters out there. I would think something like that would provide very good filtering for a long time with very little flow loss, from stock. Looks like a fuel pressure guage will also be required. I have read that some stations poke holes in the station pump filters to save money. Maybe we need a pre-filter in the fill tube to stop the initial larger crud, something like a fuel sock? This is getting ridiculous so I'll stop.

 

[oneshotkyle]

call richard at glacier diesel, i think he can answer these questions...

 

[NJones]

I have one from Glacier (2 Micron) for the very reasons you stated. You keep the 7 mic then goes thru the 2 micron. Manually checked pressure post 2 micron was 10 lbs at idle. Didn't check it before install. Runs a Quad race box without problems so far.

 

[WStephens]

I installed the GDP kit on my truck and installed a fuel pressure gauge down stream from the new filter with the big hose kit. The pressure runs 8. 5 to 9. 5 psi under normal conditions I can pull it down to 5 psi if I put my foot in it. I have been told that I can pull the pressure down to 3 psi with out doing damage to the injector pump but I have not had an issue with it. I am still running the stock LP in the tank and seems to be doing just fine.

 

[DBond]

If Bosch and / or Cummins recommend 5 micron, as has been stated in several threads, why not setup for that rather than the 2 micron. I know 2 micron is nice, but since there is more issue of pressure drop and clogging from gelling why not just go to 5 micron?



Is the FS19800E 7 micron "absolute"?

 

[Buffalo]

I've been running a Cat. 2 mic. fuel filter for over a year, now, with no problems. They come in two sizes, long & short. About $18. 00 for the larger filter.



Joe F. (Buffalo)

 

[CBrahs]

Correct me if I am wrong but I am new to the CTD world. Would it not be easier to install an inline filter between the tank and the original fuel filter? I did that on both of my previous D-Max trucks with no problem and they dont' have a lift pump.

 

[TMoe]

additional fuel filter

The answer from Cummins or Bosch, I forgot, mentioned a 5 micron absolute, meaning no particles larger than that get past filter media in single pass test. If you can get a 5 micron absolute then maybe that would be OK. The new 7 micron, not absolute I believe, is hopefully to address ULSD fuel and not as a response to injector problems. The 2 micron filters being used from Fleetguard are not absolute but may be absolute or close to it at 5 micron. Cen-tek mentioned their filters, microglass ones, are absolute. They are not for engine applications but fuel station pumps. I don't see what the difference is if they meet pressure, drop, filtration, etc. I would prefer to filter the fuel better before it goes into the tank and stick with factory 7 micron every 5000 or so. I am concerned about 2 micron flow/drop in Minnesota winters at -20 below.



Can someone explain to me how high pressure ruins the rating of the filters? Are they rated at a few PSI and our system being 10 PSI is high pressure? I thought the differential pressure drop, related to flow, would dictate filtering abilities? That must be wrong. Thanks.

 

[DFrank]

So is there any filter upgrade that jst drops in? I'd like better filtartion, but don't really want the hassle or expense of adding a whole new element.

 

[brista]

So is there any filter upgrade that jst drops in? I'd like better filtartion, but don't really want the hassle or expense of adding a whole new element.

The best you can get to drop in the factory canister is a 7 micron at the moment.