I wanted to try an in tank electric fuel pump to see if they are more reliable than the manual pumps. Is there anyone that has tried putting on an electric fuel pump on he end of your factory sending unit/where the sock/filter was? and if so.. which pump did you buy? Thank you!

Don't think you are going to find a carb spec in tank fuel pump.

I know Chrysler put them in M bodies back in the day, but they tend to seize up quick because the unbaffled tank lets them suck air. Never had one last.

Well, I can put a regulator on it... I just don't want 20+ lbs of pressure coming out of the pump. I just found a Stewart Warner exterior pump that has a 48" dry sucking capability so it will self feed well..I just don't know how noisy it will be. I have used Carter and Edelbrock Mechanical pumps but they don't seam to last too long 2-3 years then they don't work any more.

I have a Tanks Inc. tank & pump on my 68 Charger & have a carb, I run a return regulator, 3/8 supply & 3/8 return, runs 6psi, works great.

What an interesting idea. using an electric pump that works just like at least 50 million vehicles on the road.

The fuel injection systems usually are either around 15psi (TBI) or 50psi (MPFI). That basically tells you what the pumps are pumping into. The pressure in the line is determined by the regulator at the end of the line. The pump produces a pretty constant flow and the regulator modulates the pressure in the line by how much fuel goes back the return line. In the last few years there have been designs that don't use a return line and regulate the pressure at the pump. There have also been systems that modulate voltage to the pump to reduce flow in times of reduced demand.

On some pickups where the body didn't change but the fuel delivery system did, it would probably be easiest to buy a new tank intended for fuel injection so the right baffles, etc were already there and the tank was set up for an in tank pump/filter/sender module.

The tanks for electric in-tank pumps are not that complicated, usually they have a simple plastic baffle around the pickup strainer.

In general I'd favor a pump for a TBI system.

R.

Basically what you need is a modified or replacement tank with a well/reservoir in the bottom to keep the pump pickup sock/screen covered with fuel at all times, having the return line dumping back into the well/reservoir aids in keeping it full,the pump you chose has to have the appropriate type sock/screen on it submerged to keep the pump supplied.

In tank pumps are reliable. I doubt you can put an electric pump on the end of the factory sending unit. Why would you want to? I have an Aeromotive Stealth 340 in the GTX and a Walbro 255 in the Charger. Both are set up with return and both use carb. Both work good and both are reliable.

If setup properly.

Hang it on the end of the stock pickup tube in an unbaffled tank and you will find it is no longer reliable.

Here is the EFI tank I used, it has baffles.

Strange, my plastic gas tank on my Carravan has no baffles, and no sump, just the canister with the pump-filter and fill gauge all in a drop in piece. They have a spring setup that adjusts the pump to the depth of tank. Why can't something like that be retroed in an existing tank? In fact, I have 4 non working ones from various cars that I scrounged out of the junk pile of the fix it shop next door to compare. Biggest thing is making a new lid to seal to tank, I like the idea of the no return line, bypassing back into tank, then dead head with a Holly pressure reg set at 6-7 pounds.

Well, Yeah

This is the tank in the GTX. It is not at the end of the sending unit. This is how its done with a stock tank

What application?
I put a Spectra EFI tank in my Challenger, perfect fit, fittings are where the stock sending unit would be.
Baffled and works great, check RockAuto for best prices.

As stated above, running an in-tank pump for a carb can successfully be done a variety of ways without much trouble on lower horsepower applications.

Problems arise though when you try to feed higher horsepower motors with the low pressure pumps that are available. You can use a bypass regulator system, but that has issues and added plumbing.

Cavitation and fuel tank slosh are other issues that you have to keep in mind when designing high volume, low pressure systems.

Modern cars all use dead head fuel systems with pulse width modulation controlled by the ECU. These are all relatively high pressure systems though. No one has overcome the issues with trying to control low fuel pressure pumps using pulse width modulation yet.

I'm using a work around using a high volume, low pressure, two speed fuel pump on a bypass regulated system with the Holley Hydramat pick-up to deal with the fuel control issues in the tank.

The fuel volume is controlled with a simple open/closed switch. Openning the secondaries triggers increased volume from the fuel pump, while at cruise on the primaries it operates at a much lower output. This keeps the fuel pump cooler, so it lives longer on the street. I mounted mine outside the tank for easier access, but it could have been mounted inside the tank.

This is the pump I chose. 40402 Pump: 160 GPH @ 15 PSI - RATED UP TO 800HP This 200 GPH free flow rating fuel pump is programmed to deliver the maximum flow with the lowest current draw available. Nothing else like it

what kind of problems with a return set up? I have a high pressure EFI pump on mine with a carb, been doing it that way for 20 years.

[/quote]

what kind of problems with a return set up? I have a high pressure EFI pump on mine with a carb, been doing it that way for 20 years. [/quote]

I think you may have misunderstood my point. Return systems, properly done work very well, although having a high pressure pump running at full power constantly on a street driven car is not ideal.

We have had excellent service and support from Aeromotive, give them a call

To make things easier for you, Why put a pump where it would hard to get to? Put a inlne pump and filter so you can get to it fast

What application and power level? If stock or moderate power there are inline pump setups that can handle some suction. The Carter electric is an example.

Agree an EFI tank with return system and regulator would work well also... just need to make sure the charging system and wiring can handle the higher amps.