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Message: [QUOTE="TARM, post: 295040, member: 578"] I was basing what I siad off of your comment here I read that as infront meaning after the AD. I guess you could see it either way. Front being before or infront meaning toward the front inline to the actual engine. If its the dahl 150 then no issue at all as the resistance is only 0.75psi @ 80gph flow rate. I do not know what the DAHL100 is for resistance psi@gph. The issue I would have with the AD100 reliability. As long as that is fine and we are speaking of deleting the stock SD pump or at least not having it in a straight line with the AD then OK. BigBore, On your comment about running two pumps gives one more that could fail and stop fuel flow. I do agree with that being one risk with running two pumps in series in a traditional fuels system setup. I think the positives are still worth it but that is a individual decision. I run a system that is plumbed quite different than is typical in the diesel world. The way I have it setup with the 0 psi surge tank and the fuel/air return from it, if the carter was to fail or blow a fuse etc, the return line from the surge tank would actually then work as the feed line to the main 044 pump. That is part of why I designed it the way I did. Not to mention the way I have the hose and fitting used I can actually stop and unscrew the hose ends from the carter and route it around the carter if I so chose. I would simply undo the fitting going into the Carter and instead screw it into the Dahl150 that the carter is directly attached to. I left a bit of slack in the feed line for just that reason. I may actually be redoing my system. Not in the the parts used or their general setup just to relocate them. I am moving the batteries to the passenger side rail and then locating all but the carter lift pump into the engine bay. So much easier to get to and no where near as tempting for some jerk to screw with your system. I have heard of guys having people unscrew filters or open the petcock on the dahls, pull wires off the pumps. . I guess with lifted trucks even slightly the increased visibility of the system makes it a target. One guy I know ended up with 20 gals of diesel fuel all over a parking lot. But beyond that I like the idea of it being at eye level in the bay instead of having to crawl under the truck and the protection it affords the parts while off road or in deep snow. [/QUOTE]