So I know this subject has been beat to death and there's more than one way to skin a cat ( as Mitch would say...Hope you're doing well buddy!!!) and the subject of always placing the HPFP in between the two spin on filters when used is generally the best way, but what if you're still using the HFCM as the HPFP? I've drawn a couple of setups, one to include the current setup on my truck for ease of understanding.
This is the current setup on my truck. It is the factory fuel bowl/RR on the engine with a 4 micron motorcraft filter, the factory HFCM with a 10 micron filter and two Napa 3405/3528 12 micron water separator and 2 micron fuel filter which are in line from the tank to the HFCM.
My HFCM pump is new and I would like to keep using it and purchased an Aeromotive 13129 FPR so I could do a REAL regulated return and completely eliminate the bowl. This is my desired
setup and plan to do the system like this:
My question is, since most people recommend the water separator first, the HPFP, then fuel filter, since I'm running the HFCM with the 10 micron filter, is it necessary to put the filters on either side of the pump like this? The reason I ask is because just like my setup now, the finest filtration is still before the pump and the pump itself has its own filter so is it really necessary?
The who reason I do NOT want to split filters around the pump is simply for ease of maintenance and component location under the truck. I have all the parts to run the setup with the first picture and I don't know that I would need to purchase anything different to split the filters, I just don't really know if I need to. I mean, I don't think I do and it's working great now and has been for the last 20,000 miles.
Any thoughts folks???
Also, keep in mind, I may most likely just run my return line from the Aeromotive FPR back through the original fittings on the HFCM, just with -6AN lines ALL the way back to the tank, although that isn't depicted in any of the pictures.