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been going back and fourth in my mind on pros and cons of 2 micron vs 4 micron fuel filters. pros obvious. cons not so obvious.
ultimately I removed a relatively new cat 2 micron filter and put the baldwin 4 micron filter back in. both were new with less than 100 miles.
the main reason, the 2 micron had my cp4 rumbling during 15 degree weather. the high fuel pressure commanded vs actual was fine...but just didnt have a warm fuzzy.
sounded much better as soon as I went back to 4 microns.
I might put the 2 micron filter back in in the spring.
Get some water filters of varying micron and blow through them. Thats what it takes to force fuel through them to reach the CP4, also keeping in mind the pump is forcing it through two filters. this goes back to the covid mask days, For a mask to be truly effective to stop the virus, people wouldnt be able to breath. The virus is something like .03 micron in size and the masks are supposedly 1 micron, which allows 3 virus to pass through clumped together, or countless virus at any given time. To be effective it needs to be layered multiple times like in a water filter. Try breathing through one and you will quickly understand.
Get some water filters of varying micron and blow through them. Thats what it takes to force fuel through them to reach the CP4, also keeping in mind the pump is forcing it through two filters. this goes back to the covid mask days, For a mask to be truly effective to stop the virus, people wouldnt be able to breath. The virus is something like .03 micron in size and the masks are supposedly 1 micron, which allows 3 virus to pass through clumped together, or countless virus at any given time. To be effective it needs to be layered multiple times like in a water filter. Try breathing through one and you will quickly understand.
About the other stuff...
I am going to run the 10 micron fuel filter on my Air Dog when it finally gets installed @rufushusky convinced me of that as he has his stuff together when it comes to the fuel filters and system stuff... to me, it would be too much of a PITA to switch back and forth from the 2 micron to 10 micron come change of seasons as I intend to retain the factory DFCM and do have the 10 PSI rated spring to swap out the 65PSI rated spring in the Air Dog that it came with as the newer systems are meant to replace the DFCM. I want to supplement the DFCM like the older systems did and feed it with the Air Dog, but that is all for another thread and time... the factory secondary filter is 5.x micron rated and should be good enough for the system. I love all this conversation though and adding to it....
The 2 micron filter may have issues in the cold weather months when fuel may thicken and even gel up.... but I believe due to the new specs that Rufus has talked about before, isn't a 2 micron actually a 4 micron filter? Hopefully Rufus will chime in here.
been going back and fourth in my mind on pros and cons of 2 micron vs 4 micron fuel filters. pros obvious. cons not so obvious.
ultimately I removed a relatively new cat 2 micron filter and put the baldwin 4 micron filter back in. both were new with less than 100 miles.
the main reason, the 2 micron had my cp4 rumbling during 15 degree weather. the high fuel pressure commanded vs actual was fine...but just didnt have a warm fuzzy.
sounded much better as soon as I went back to 4 microns.
I might put the 2 micron filter back in in the spring.
Originally Posted by Overkill2
.
The 2 micron filter may have issues in the cold weather months when fuel may thicken and even gel up.... but I believe due to the new specs that Rufus has talked about before, isn't a 2 micron actually a 4 micron filter? Hopefully Rufus will chime in here.
I think it was one of the revisions to ISO 19438 circa 2008 or 2012, for all practical purposes 4 microns became the "new" 2 microns.
Even in Cat's promotional material the 1R0749 "2 micron" and the super duper 416-1225 ultra high efficiency, which is an upgrade from the 1R0749, are rated at 4 microns now
Now Cat claims these are above absolute (beta ratio 75 or 98.67%) efficiency so they are definitely grabbing particulate matter less than 2 micron but aren't rated at that threshold. The Baldwin cross reference to the 1R-0749 is rated at 4 microns at 98.67%, while Cat is at 99.7%. So on paper the Cat filter is a tighter filter, in reality you are splitting your blood into cells and plasma to find a difference, can't split hairs cause they are way too big at this scale. IIRC Fleetguard still has a few filters they rate under 4 microns but IIRC reference an older standard.
Just curious do you have inbound low side fuel pressure?
Me personally, I have a Baldwin BF7587 in my garage for my truck. It is cheaper than the Cat (marginally) and should provide plenty of flow and filtration for what I am looking for. That said, when my Fass stand alone low pressure pump died on me on my dodge, the CP3 pulled fuel through the factory fuel filter, a Cat 1R0750 (the shorter 0749) and a FG FS1000 and only when it was sub-zero did I have any starting issues. Obviously that would be grim death for a CP4 but the Cat filters flow quiet well ever when cold. I do think a filter heater wrap isn't a bad idea in the grand scheme.
I think it was one of the revisions to ISO 19438 circa 2008 or 2012, for all practical purposes 4 microns became the "new" 2 microns.
Even in Cat's promotional material the 1R0749 "2 micron" and the super duper 416-1225 ultra high efficiency, which is an upgrade from the 1R0749, are rated at 4 microns now
Now Cat claims these are above absolute (beta ratio 75 or 98.67%) efficiency so they are definitely grabbing particulate matter less than 2 micron but aren't rated at that threshold. The Baldwin cross reference to the 1R-0749 is rated at 4 microns at 98.67%, while Cat is at 99.7%. So on paper the Cat filter is a tighter filter, in reality you are splitting your blood into cells and plasma to find a difference, can't split hairs cause they are way too big at this scale. IIRC Fleetguard still has a few filters they rate under 4 microns but IIRC reference an older standard.
Just curious do you have inbound low side fuel pressure?
Me personally, I have a Baldwin BF7587 in my garage for my truck. It is cheaper than the Cat (marginally) and should provide plenty of flow and filtration for what I am looking for. That said, when my Fass stand alone low pressure pump died on me on my dodge, the CP3 pulled fuel through the factory fuel filter, a Cat 1R0750 (the shorter 0749) and a FG FS1000 and only when it was sub-zero did I have any starting issues. Obviously that would be grim death for a CP4 but the Cat filters flow quiet well ever when cold. I do think a filter heater wrap isn't a bad idea in the grand scheme.
You are so the fuel filter spec guru brother... love the input and your knowledge...
And great point on the filter heater wrap... but would that be enough for a fuel tank close to gelling and getting wax particles starting to drop out? What's your thoughts?
Last edited by Overkill2; Dec 27, 2024 at 02:10 PM.
Reason: add to post
Too cheap... I say it's a Chinese fake. I just don't trust Amazon after receiving that fake set. I did order a set prior to the fake set before and it looked to legit but that second set down the line was sure the heck not... but who knows?
Amazon has a massive counterfeiting problem. I don't buy any filters or important car parts from them. Not worth it.
From Amazon description-
About this item:
Brand Ford
Vehicle Service Type Motorcraft
Item Weight 1.94 Pounds
Style Modern Manufacturer Auto Extra
They are genuine though, I bought a set. This is from the Ford Store on Amazon too, and knowing Ford, if this was not genuine, they would have sued them off Amazon by now. If you look at the top of the engine filter you can see the part number is etched, not stamped, the counterfits print the part number on, only the factory filters use etching.
Oh and Auto Extra is the OE manufacturer, they sell the same products on Rock Auto , Summit and a few others.
Thats ONE of the manufacturers. Auto Extra is licensed to sell under the Ford/Motorcraft brand. The link to the fuel filter kit I posted, links to Fords official Amazon page. Auto Extra is a large aftermarket supplier of brand named products. Some the filters they sell are produced by WIX.
Auto Extra offers an extraordinary breadth and depth of products and delivers high-performance parts to the aftermarket. Putting their customers first, Auto Extra ensures their parts install easily with OE fit, form, and function. Founded in 1968, Auto Extra is a major distributor of replacement parts, equipment, tools, accessories, paint, and related products for motor vehicles in North America. They are the 5th largest distributor in the United States and the leading independent distributor of automotive paint and related products in the country.
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