I have my pump mounted externally in front of the rear axle where Tom suggest. Been there for a LONG time now. No issues at all. Being fully aware of possible problems with the stock pickup I ALWAYS refuel at 1/4 tank and take no chances. Someday I'd like to redo the setup to in tank or at least a larger feed tube from tank to pump, but the someday list is pretty long and I don't know that I will ever get to it! Mark Price Morgantown, WV 26508 1969 AMC Rambler, 4.0L, EFI, T-5 2004 Grand Cherokee Laredo, 4.7L, Quadratrac II "I realize that death is inevitable. I just don't want to be around when it happens!" ----- Original Message ----- From: "Frank Swygert" <farna@xxxxxxx> To: amc-list@xxxxxxxxxxxx Sent: Sunday, June 21, 2009 11:41:01 AM GMT -05:00 US/Canada Eastern Subject: Re: [AMC-list] EFI 196 conversion issues (fuel pump) The pumps are generally pushers, but no more than 3 feet on the suction end appears to be just fine. If there is some head pressure (pump lower than tank) you can put it a good deal further away, but I wouldn't go more than 5-6 feet. No t a worry in your case, of course! You might want to put a splash shield over the pump though. More to keep rocks and road debris from hitting it than water. A flat piece of sheet metal screwed into the bottom flat of the rail and over the pump, maybe bent up toward the floor around it. You won't have to worry about starving the pump on a hill. Since there is no sump for the pickup you can if there's not more than 3-4 gallons of fuel in the tank. Just keep it at 1/8th tank or more. I only had that problem once when running the stock 63 Classic tank with pickup in the middle. Had less than 1/8th tank and parked on a hill with the car sideways. Just enough to starve it! Had to push it to a level to start, then got gas. Should have BEFORE stopping. NEVER had a problem while driving though. My current tank has a dam in it, making the lower front portion more or less a sump. Pickup is to the left side. When the gauge reads empty I have about four gallons in it, which is plenty to keep it from starving, but if I run it down to about three gallons it will start to catch air on turns. So when it reads empty, I fuel up! If you use a common pump you shouldn't have to worry about keeping a spare. Just keep the original application and part number in the car. Even some of the in-tank pumps can be used externally. The Jeep XJ pump can (pre 96 only... 96+ has an in pump regulator that dumps fuel back in the tank). You would have to get screw-in fittings for the hoses. It will last a long time not in the tank. A common MPI pump is a Ford external pump. I have the number, but it won't do you much good -- way too much pressure! I checked on those Holley pumps. I don't think steady pressure would be a problem with a regulator, the bypass line on that type system can be plumbed right back into the fuel line in front of the pump output but before the regulator, forming a loop. That should steady any pressure pulses. The big problem is the ones that put out 12 psi (15.5-17, actually) are $431.95. A standard Holley TBI pump that puts out up to a steady 15 psi is $164.94. Still, I'd get a factory pump if available so you don't need to keep a spare. -------- From: tom jennings <tomj@xxxxxxx> Subject: Re: [AMC-list] d@mned holley carb anyway > > > > Tom, the fuel pump doesn't HAVE to be lower than the gas tank, but it will > > last longer if it has a little head pressure on it. > > OEMs get to design their systems well, us hobbiests have to work with huge > margins and limited choices. They are push pumps, not suckers, and I was > afraid that climbing a steep hill with a low tank the pump would starve. Not > good! Luckily that particular location on our cars is really convenient and > easy. The fuel line runs right by the area. Length on the suck side is under > 3 feet including the pickup. > -- > Frank Swygert > Publisher, "American Motors Cars" > Magazine (AMC) > For all AMC enthusiasts > http://farna.home.att.net/AMC.html > (free download available!) _______________________________________________ AMC-list mailing list AMC-list@xxxxxxxxxxxx http://list.amc-list.com/listinfo.cgi/amc-list-amc-list.com _______________________________________________ AMC-list mailing list AMC-list@xxxxxxxxxxxx http://list.amc-list.com/listinfo.cgi/amc-list-amc-list.com