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74 Charger has anyone installed an efi in tank pump on the factory sending unit??

64fury74charger

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I didn’t find any thread on search so has anyone installed an in tank fuel pump using the factory sending unit?? If so what do you need to modify? Looks like the pick up tube lays sideways on the bottom of the tank and I am not sure if the pump will work properly. And the unit loads in on the side of the tank. I am also considering putting a module in the top and then use the sending unit line for the return. My sending unit is only working intermittently and needs replacing which means pulling the tank plus the tank has some leakage issues.

I am leaning towards using a 72-73 tank either way and the there should be a little space above the tank because it won’t have the hump in the tank. Those so-called universal modules are expensive just to get a fancy mounting piece that won’t be seen anyway.

Any experience with this is greatly appreciated. :jackoff: :thankyou: :luvplace:

:xscuseless: :steering: :moparsmiley:

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I'm running a pump on a factory sending unit with an added return line. The pump has a sock on it. It pressures the system good when the tank is full and down to about 1/2 tank. Below that the fuel sloshes and I get fuel pressure pressure fluctuations.
I've been looking at a custom tank with baffles and module but like you say that setup is expensive.
 
I'm running a pump on a factory sending unit with an added return line. The pump has a sock on it. It pressures the system good when the tank is full and down to about 1/2 tank. Below that the fuel sloshes and I get fuel pressure pressure fluctuations.
I've been looking at a custom tank with baffles and module but like you say that setup is expensive.

Did you just hang the pump on the end of the sending unit or shorten the tube?? I am concerned about the fuel pump picking up fuel under all reasonable conditions and laying on it’s side. Sounds like you have had some issues at times.
 
I might have trimmed it some but the pump is on the bottom of the tank and I had a 90 sock for the pump
 
I was researching tank options for my 74 Charger and found a complete tank setup from Aeromotive for the 71-72 Charger and it looks really good. Pump lines are both set up on the side where the sending unit is along with the power and sending unit stud. Includes sending unit with the correct ohms and fully assembled.

By the time I added up a new tank, sender, module pump assembly and having to cut up a new tank and my time this looks like a good bang for the buck and should be relatively easy to install. Priced about $540.00.
Now I am going to put a Weiand intake on and update the throttle and kick down linkage to cable, then the efi and go from there.
 
I was researching tank options for my 74 Charger and found a complete tank setup from Aeromotive for the 71-72 Charger and it looks really good. Pump lines are both set up on the side where the sending unit is along with the power and sending unit stud. Includes sending unit with the correct ohms and fully assembled.

By the time I added up a new tank, sender, module pump assembly and having to cut up a new tank and my time this looks like a good bang for the buck and should be relatively easy to install. Priced about $540.00.
Now I am going to put a Weiand intake on and update the throttle and kick down linkage to cable, then the efi and go from there.

watching this thread closely, have a similar application in that I’ve got a 74 roadrunner and want to go efi. We used a phantom 340 in tank pump and modified stock, but as you pointed out the fuel sending unit doesn’t work properly and so we don’t have reliable fuel level readings.

Need to replace the tank anyway as it was for single exhaust and engine was swapped to a 440, please let me know how the 71/72 tank works in a 74! It would be much appreciated, as I’ve had my eye on that aeromotive tank and it would certainly be the easiest option if it works.
 
watching this thread closely, have a similar application in that I’ve got a 74 roadrunner and want to go efi. We used a phantom 340 in tank pump and modified stock, but as you pointed out the fuel sending unit doesn’t work properly and so we don’t have reliable fuel level readings.

Need to replace the tank anyway as it was for single exhaust and engine was swapped to a 440, please let me know how the 71/72 tank works in a 74! It would be much appreciated, as I’ve had my eye on that aeromotive tank and it would certainly be the easiest option if it works.

The earlier tank should work ok with the straps. According to their website the tank comes completely assembled including the correct ohm range for the sending unit. My Chargers tank is due for replacing anyway and the sending unit as well. Great time to experiment because this is not a show car. The other item I plan to do is replace the dash cluster with a drop in with Autometer gauges. I am putting the funds together and hopefully within the next month I can get the parts to my door and get busy. I will update here as things progress.

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The earlier tank should work ok with the straps. According to their website the tank comes completely assembled including the correct ohm range for the sending unit. My Chargers tank is due for replacing anyway and the sending unit as well. Great time to experiment because this is not a show car. The other item I plan to do is replace the dash cluster with a drop in with Autometer gauges. I am putting the funds together and hopefully within the next month I can get the parts to my door and get busy. I will update here as things progress.

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Beautiful car, I love the color! And thanks for the info, I’ll most likely pull the trigger on this tank - just need to see what else needs to change On our fuel system to accommodate the new tank.

as for the auto meter drop in, that’s what we did and it definitely looks sharp!

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I ordered the Aeromotive tank for the 71-2 Charger in late May and just received a call yesterday that the tank is done and should ship Monday. Like everything else there was a delay due to part availability. I am looking forward to working on my car and hopefully taking care of some much needed upgrades.

I also have ordered the Autometer drop in dash from Summit and that’s been pushed back again so it looks like that’s later down the road. I really wanted to do all at the same time since the car will be parked and taken apart.

For the efi I have decided to go with the Sniper. I was on the fence between the Atomic 2 and the Sniper but I don’t have to plumb in a regulator. I will try to post here as things progress and pass along information on challenges along the way.
 
Update on my latest project, the fuel tank arrived Friday and looks like it survived shipping and was double boxed for transit.
I ordered the Sniper efi yesterday and that’s on its way from Summit and should be here this week.

We are buying a new hot tub today because ours has finally run it’s course after almost 20 years of service so I don’t think I will have a chance to get pictures of the tank today. I will be updating here as soon as I can. Hopefully this will work out and maybe help someone else who is working through similar issues can follow along here.

I am thinking this should be relatively simple because the earlier tank is still roughly the same size and doesn’t have the hump on top that comes up in the trunk floor. My plan is to see if that hump can be turned into an access point in case the pump needs to be replaced. OK enough for now this post is running way too long :lol: :rofl::luvplace:……to be continued…..:popcorn2::steering:
 
I guess whatever manufacturing delays that they were experiencing have been overcome, this showed up in the driveway today!

install was pretty simple, fuel tank comes ready to install and just needs to be hooked up to the fuel lines and electrical.

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I guess whatever manufacturing delays that they were experiencing have been overcome, this showed up in the driveway today!

install was pretty simple, fuel tank comes ready to install and just needs to be hooked up to the fuel lines and electrical.

View attachment 1143283 View attachment 1143284 View attachment 1143285 View attachment 1143286

I plan on starting on mine next week. We are also replacing our hot tub so I have been taking the deck down and preparing for the swap out which is supposed to be next week as well. These tanks look good for the money and maybe the sending unit will work too. Looking inside the tank the sending unit has been relocated or moved over to allow room for the pump .
I also have the sniper efi and the lokar throttle bracket specifically for the sniper as well.
:xscuseless:

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I plan on starting on mine next week. We are also replacing our hot tub so I have been taking the deck down and preparing for the swap out which is supposed to be next week as well. These tanks look good for the money and maybe the sending unit will work too. Looking inside the tank the sending unit has been relocated or moved over to allow room for the pump .
I also have the sniper efi and the lokar throttle bracket specifically for the sniper as well.
:xscuseless:

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that looks like a fun project! The tanks definitely seems like a good quality unit, I was pleasantly surprised when it showed up. I do need to figure out a way to set up the vents on the tank, the unit it’s replacing was one of those drop in fuel pumps and that had a “vent” port - this one assumes using the oem setup but it’s different for a 71-72 vs a 74.
 
that looks like a fun project! The tanks definitely seems like a good quality unit, I was pleasantly surprised when it showed up. I do need to figure out a way to set up the vents on the tank, the unit it’s replacing was one of those drop in fuel pumps and that had a “vent” port - this one assumes using the oem setup but it’s different for a 71-72 vs a 74.


I glanced at the papers for it and it looks like those are vents for OEM replacing so maybe just use 1 for the vent. Or maybe get a proper fuel cap that vents. I haven’t been to worried about that part until the tank is in. Lots of options. The old tank needs to go and not trying to put a fuel cell in the trunk is a real bonus…:lol:

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I actually made good progress on the fuel tank today. The original is out on the ground and I was able to “test fit” the new tank and it’s looking good. :thumbsup: :thumbsup: :lol:
There is quite a space where the hump was so I may fabricate some spacer because the j hook mount is much shorter on that side. I was thinking there was more space on the back edge of the tank before the hump, no big deal.:steering::rofl::moparsmiley::moparsmiley:

The sniper efi looks really nice and should be relatively easy once the tank is mounted. :popcorn2: :lol:

:xscuseless:

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The underside above the tank looks good and no rust or other ventilation that’s always good. I put some insulation on the top of the tank and built up a little bit around the pump so it won’t be contacting the underside area.
:xscuseless:

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Great day today, tank is in and fuel lines and filter are in, filler neck is centered under the license plate. I put the fittings on the tank and hooked up all the wiring on the tank before final install because it’s tight once the tank is up in place. This will make the wiring easier after the efi goes on. I have a 10 micron fuel filter right off the tank and it’s easy to access when needed.

The filler neck was a real pain, but it would be much harder to put it in after the tank was in. I have 10 gauge wire for the pump and the ground zip tied on the tank so I don’t have to chase down wire. Overall this was relatively easy and you have to think about how everything goes under the car and space is limited once the tank is installed.

:xscuseless: :lol::steering::rofl::rofl::rofl::rofl:

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