With stock fueling and OE parts, even thru extra filters, it is rare you can pull it under 5 psi with a good in-tank pump. With tuning the stock system is good for right at 500 HP max, naturally by that time it is out of fuel and air both but nothing gets driven that hard in normal usage anyway.
Finally got around to adding a second (actually 3rd) filter, almost done. I added the OEM kit previously, but it has been pointed out that that is a prefilter/water separator... only getting the really big stuff. Seems best filter to use in the OEM Engine location is about 3 of 4 micron, and Expensive.. so I got a filter mount for a 2 micron Donaldson, and went looking for a place to install. Turns out I can piggy back on the frame rail mounted kit, and being that the OEM kit has a heater, it will cover both filters should I find myself somewhere cold. I made a bracket to bolt onto the kit bracket, this bracket holds the new filter base. I just finished mounting it, but have not yet connected the fuel lines. I also plan to add a fuel pressure guage to the output, read in cab, and a second before filter local gauge for diagnostics, should help with determination of when a filter needs replacing, the new filter will have the tightest filtration, and expect it to fill up first. Here are a few pictures, I'll get on truck pictures when it's all connected.
I have the Donaldson P551313 secondary filter for the new filter base. I'll replace the engine mounted filter in the OEM location with the Donaldson P550908, that one is expensive and I plan not to replace it often as really shouldn't see anything after the new filter is in the system.The OEM 2nd filter kit is a pre-filter, but that's not a bad thing. It's still a 25µ filter which keeps the factory bowl filter just working on the smaller stuff, and then a 3µ after that to polish the fuel. Sequential filtering should result in cleaner fuel and longer filter life. That's also why you often see one under the cab, OEM, and one on the intake horn.
The Donaldson is likely a 3µ filter as that's the finest media right now. 2µ is a standard that was changed circa 2004.
The Fleetguard FF5814 is also a 3µ but, IMHO, has better media than the Donaldson thou I'll run a Donaldson if I can't get my hands on a FF5814.
Which Donaldson are you going to run?
It is SOP in marine environments.
That is a nice looking kit, but a bit pricey. It doesn't have a fuel heater, nor water in fuel sensor. The advantage of that kit is it's ready to go.. the way I took took the OEM kit (Water/Fuel Separator prefilter), with heater, and WIF sensor, then a secondary fine filter. Also I measured I can even use the longer 10" CAT 749 filter, since the secondary it elevated above the OEM kit filter. I had less than $150 in my set up, but certainly more time. It's all what works best for your capabilities. Other than time, the down side of my set up is the OEM kit uses a more expensive filter.So...I ended up going with this setup - http://dieselfuelfilterkits.com/03_1...ilter_kit.html
It was a clean install and I am happy with everything so far. Company is good to deal with and answered my questions quickly. I will post pics when I get a chance.