I put in the comp engineering sump over the weekend and kinda getting ready to mount the fuel pump. The problem with the electric pumps that I have is mounting it low enough to not have fuel starving problems but I don't want all my junk in plain view. Initially, I thought about making the trunk floor flat and raising the tank up 2 or so inches and I haven't ruled it out yet. But it doesn't look to fun. I've attached some pics to give everyone an idea. What's your take on it?
You may want to mount that pump with rubber isolators to a plate that is mounted to the frame with rubber isolators so it quiets the pump noise. You definitely don't want to mount the pump to the tank.
Here is an old picture of how I hung mine. The rubber, like PaulS said, is very important, or your frame will vibrate with the sound of the pump. There are little rubber grommets on both sides of the hanging frame I made to isolate the pump vibrations. It is now silent, when before, you could hear it over my dual Flowmasters. Inside and outside the car. Please ignore the ugly brass fittings and picture in your mind -AN fittings here...
when i installed my...Holley Projection System...their Tech Support suggested to mount the pump... under the hood... ...the pump came with the kit...
I mounted mine on the frame rail forward of the rearend. (MrGasket 12D low pressure pump) No isolators works fine, you can barely hear it in the car with the engine off.
Most of the high pressure pumps work better as "pusher" pumps than "puller" pumps, meaning it's best to mount 'em as close to the gas tank as possible. That said, my first stab at running EFI back in the early 90's included mounting the pump under the hood and connecting the return line with a "T" directly to the input of the fuel pump. The car ran this way, but sitting in traffic or a drive-through line for too long, especially when it was hot out would result in the fuel getting too hot and eventually the car would quit and I'd have to let it sit until it cooled down... Haven't had that problem since I moved the pump to the rear frame rail with a separate return line.
Hi Will, I mounted mine between the valence and the tank (with rubber isolators) behind the area where the license plate is. Granted it is a little high (tank needs to be about half full to be at the same height), but I use the one way valve that Aeromotive has. Also since it's behind the tank the fuel naturally flows into the pump during acceleration. But having said that, I also changed my support for my tank to fit the Mustang tank. Yours may not fit in the same place because of this. http://mmb.maverick.to/showthread.php?p=366395#post366395 See post #19. There is also one other option that you might consider. I wish that I had thought of this in the beginning, but if you are using an Aeromotive pump it is submersable. In other words, you could actually mount it inside the tank. Makes replacement a b#@%ch, but it's always bathed in cool fuel (assuming that you can afford to keep gas in the tank!). Just a thought (you would have to make some sort of a removable hatch in the top of the tank).
Hey Scooper, I noticed the fuel line is awful close to the spring hanger and over the top of the spring. Maybe you have changed that since the picture was taken? Also the pump look's awful close to the slick, which will grow and recede, especially during burn out's. For safety sake, would mount ahead of the axle and run the line away from any moving part's. JMO
Thanks guys, I planned on using the rubber isolators everywhere possible when mounting the pump. So you guys that mounted the pump on the rear frame rail like scott but on the inside of the frame don't have any delivery problems? MavMark - You mounted your fuel pump like scoop's only on the inside of the rail?? Tony - I was wondering how you had enough room to fit the pump in there, and I'll stick to externally mounting it.
Old Guy, That is just an optical illusion. Really. I took the pic with closeup lens and it makes things look closer to other things than they are. There is really a lot of clearance with all other items. Thanks for pointing it out though. I posted this picture about a year ago when I first did it and it looked the bolt heads were close enough to vibrate against the frame, so I went back down and double checked, but there is really almost an inch clearance there, and the hose is nowhere near the spring or perch. For example, look how big hose and brass fitting look compared to the size of the pump...just optical illusion. I had some feeding issues when I got below 1/4 tank before I dropped it down on those hanging metal tabs. It would get down below 1/4 and start to cavitate, and triple the noise. No issues now. And pump is silent.
Hey Will, Yes when I replaced the tank instead of cutting a new slot to hold the tank strap I cut and sectioned the rear frome crossmember which gave me the added clearance I needed for the pump. I think that you will be fine with mounting it on the frame rail. Over on the Turbomustangs site I've read quite a bit from Brett who works at Aeromotive and his opinion is that although the pumps aren't designed for sucking, they will. He just suggested that you don't mount it in front of the tank. You should be good to go. Good luck!
A big 10-4 Tony! I think I'm going to mount it on the inside of the passenger frame rail. Is your screenname the same on Turbomustangs? Thanks to everyone that helped!
Actually I'm AZ Tony over there. I was originally MNTony on all the sites I was on when I lived in Minnesota...well I moved back to Arizona...thus I changed to AZ Tony on turbomustangs. When I found the mess that it got me into by trying to change my name (lost all my postings and I still have to log on with my old name) I just left it on all the other sites! It was just easier. LOL
