EFI - locating the fuel pump

[PhilJustPhil]

My Project III unit (formerly RetroTek) just arrived. Instructions say that to be self priming the fuel pump must be located below the level of the fuel tank and within 2 feet of it. Pretty limited choices there, and I don't think drilling into the rear frame rails to mount it there would be a good idea (then again, what do I know


Some of you have done this before. Where have you put the fuel pump? Maybe fabricate a bracket that drops it down low enough? Also a bit concerned for the possibility of damage from crap kicking up off the road.

(This is a "returnless" system, so at least the fuel lines will be pretty straightforward)

Thx
Phil

 

[MustangB]

You can make a bracket that hangs from the turned down lip that forms the hole in the trunk floor where the gas tank sits. I mounted my fuel filter to this lip (between the tank and the rear diff) and have had no problems. You can extend the bracket so that the pump is even with the bottom of the tank. It does not have to be below the tank since you'll never try to start it with an empty tank, right?

 

[blown65]

You can have it above the bottom of the tank. Key thing is to have it below where you would have your fuel level when full so if you do run out once you fill the tank it will prime itself.

Mine was about mid way down the tank and worked just fine. That way even with a half a tank of fuel it could pickup fuel if it ran dry at any point.

 

[iskwezm]

the self priming isnt really a issue. I have a rear sump welded to my tank and the pump sits on the right side of the tank(where the exhaust normally is). I have yet to have anything hit the pump.Im sure if it did, it would hit brake lines and fuel lines too, which at that point, it souldnt matter where the pump was.

 

[blown65]

the self priming isnt really a issue. I have a rear sump welded to my tank and the pump sits on the right side of the tank(where the exhaust normally is). I have yet to have anything hit the pump.Im sure if it did, it would hit brake lines and fuel lines too, which at that point, it souldnt matter where the pump was.

Exactly, yours is below where your fuel level would be most the time. Should work great like you have it.

 

[PhilJustPhil]

Thx for the suggestions!

 

[65 fastback]

Here's my Projection returnless set up:

Here's the bracket I used. It mounted in the same location as the gas tank mounting bolts. I used rubber spacers where the bracket mounts to the trunk floor and where the pump mounts to the braket and rubber isolated mounting straps to help minimize the pump sounds/vibrations - the pump runs nice and quiet and is only audible during priming, before starting.

My sits just in front of the gas tank (fuel cell) and close to level to the bottom of the tank. I, also, ran new 3/8" braided fuel line from the pump to the throttle body. Early Mustangs have 5/16" fuel line and Projection units require 3/8" supply lines.

Since I was rerouting my fuel line, I brought it up from the trans tunnel to rear feed the throttle body. I think it makes for a cleaner look.

Keep us informed.
Tim

 

[iskwezm]

Also be careful with the filter, its pretty cheap and the inlet/outlet end might crack and leak.Mine did. The filter is a wierd size and only available through Retrotek.

 

[PhilJustPhil]

tank vent?

Lots of little things to figure out before I switch over from the carb. But meantime getting the wiring, brackets, etc taken care of.

What have you done (if anything) about venting the fuel tank?

Looks like I need a 2nd coolant port for the coolant temperature sensor (I've got a Performer RPM intake) but the upper rad hose neck has a bung that should work, if it isn't completely frozen. Move the stock temp. gauge sensor there, and put the sensor for the EFI in the port in the top of the manifold?

Thx
Phil

 

[iskwezm]

when i replaced my tank, i had it sumped and welded a vent and return to the top side.

 

[rbohm]

allow me to throw out one more option for you. you can install a low pressure high volume pump near the tank, and then locate the high pressure pump where ever you wish. use something like a holley competition pump as the low pressure pump.

 

[PhilJustPhil]

I ended up not installing the system this spring... with backorders it arrived late, and summer is for driving, not wrenching. I'm into it now, and after hanging the fuel pump was disappointed to find that the fuel line kit "enough to plumb from the tank to the pump to the EFI" only had 12' of braided hose once it was uncoiled. Enough to get me from the pump to just about the front wheel. Did they really think I wouldn't notice?

Complaint sent, we'll see what happens.

 

[65 fastback]

Good luck with your project. Also, Professional Products now has a forum to support their fuel injection systems - http://professional-products.com/forum/forum.php