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Message: [QUOTE="Strictly Diesel, post: 81768, member: 1411"] My thoughts...for what they are worth. 1. I've seen too many of the "Filter/Pumps" (not naming names, but both brands) that didn't make enough pressure for a Ford to begin with. Some can be turned up, some require new springs and I've seen both die a premature death when asked to run at 7.3L/6.0L pressures for any length of time. I won't sell a high pressure unit to any customer right now because I will not tolerate another angry call from a stranded customer. 2. I've also seen pressure issues with these units because the pressure is being regulated 6-10 "hose feet" before the all of the pressure drop and demand (55psi at the pump does not equal 55psi at the injectors). You will have pressure drop across fittings, through any filters and in the cylinder heads (particularly as the tuning drives power up and the injectors are asked to put more fuel into the engine). 3. Having the PRIMARY fuel pressure regulator for the system AFTER all of this ensures that whatever pressure it is that you want actually exists all the way through the system (assuming your pump is moving enough volume to support all of the demand). 4. Having 2 pressure regulators in the system sucks. In the case of the "filter/pumps", the pressure needs to be dialed up high enough that the regulator at the engine is actually controlling the overall system pressure. 5. I personally hate the high pressure "filter/pumps". I've been around the fuel system stuff for a while now and while I'm sure that there are people with degrees and smarts that exceed my level of understanding...I have learned a few things and have a pretty good grasp on the situation. From my discussions with the patent holder for the "filter/pumps" and my personal studying of how they work, I will take a LOW PRESSURE unit feeding a second fuel pump EVERY SINGLE TIME. The air removal will be better at 10psi than it will be at 55psi+. The load on the pump motor will be lower, the heat generated will be lower, the amp draw will be lower, the motor will be quieter and on and on and on. 6. Yes, with my preferred setup you have to have 2 pumps...considering the NON-OEM level of reliability of ALL of the "aftermarket" fuel pumps that are available for these trucks, I personally like the insurance of having a second pump in the system in case one of my pumps experiences a problem. This is how my race truck is plumbed and how my daily driver will be plumbed when I get around to installing my "filter/pump" on it. 7. I take issue with the "filter/pump" companies calling their products "fuel systems". They are pumps, with integral filters...and now with fuel pressure regulators. They do nothing for the flow through the stock fuel lines, nothing for fuel pressure regulation that accounts for all of the drop and demand in the system...they are just pumps. Those are my 2 cents...if they are even worth that much. I'm sure that the "filter/pump" guys will disagree with me, and I'm sure some of you will as well. [/QUOTE]