Sniper EFI Return on Stock Tank With Drop in Fuel Pump; How?

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With that fuel pump module, you do ot need the return line. The fuel pressure regulator is in the tank as part of the unit.
 
ChrisRomello said:
Hello all,
I’m running Sniper EFI on my 360 and was wondering how I’m to run the return. I’m using a stock tank with one of these drop in fuel pump modules:
Holley 12-319 Holley OEM Style EFI Fuel Tank Modules | Summit Racing
I bought my EFI kit slightly used and it didn’t come with the return line kit.
Click to expand...

I don't know, did you start by reading the destructions? Does it need a separate regulator? What year / model car do you have? "You just might" have to figure out how to rework the tank or maybe the filler tube for a return port. Be damn sure you do research so you don't end up with a non-vented tank situation
 
If you do find yourself needing a return line check with a company called Fine lines or SS tubes, My scamp came with a 5/16 fuel line and I was able to purchase a 3/8 line from them and they come pre bent for your specific car, Installed the 3/8 line along side the 5/16 in the stock locations then used the 3/8 for fuel and the 5/16 for fuel return to the tank
 
ChrisRomello said:
Hello all,
I’m running Sniper EFI on my 360 and was wondering how I’m to run the return. I’m using a stock tank with one of these drop in fuel pump modules:
Holley 12-319 Holley OEM Style EFI Fuel Tank Modules | Summit Racing
I bought my EFI kit slightly used and it didn’t come with the return line kit.
Click to expand...

Hello ChrisRomello,
The drop in tank unit is a fuel return less type. The fuel pressure (58 psi) regulator and fuel return is built in to the assembly (see picture).
The Sniper EFI unit has its own built in regulator and provisions for a return line that would be used if installing the inline pump (master kit).
There are pros and cons to using the in-tank setup. You can do some research here on the various topics.
Holley Sniper EFI owners and Tech
Also I strongly recommend reading the complete Holley instructions before starting the install process.
https://documents.holley.com/199r11031r.pdf
I have installed Sniper EFI on a couple customers cars and my choice is running a in-tank pump without the regulator and a return from the Sniper itself back to the tank (see picture with # 6AN bulkhead fitting)
Stay Safe...
Happy Mopar :)
Arron.

Returnless drop in pump 03_08_21.jpg
Returnless drop in pump B 03_08_21.jpg
In tank return line 03_08_21.jpg
In tank return line B 03_08_21.jpg
 
I made my own return/in-tank pump "module" using a fresh sending unit with a 1/4" return already in it. I removed the 1/4" line, enlarged the hole and silver soldered a 3/8th's steel return line in it. I then drilled and fitted a fuel tight bulkhead style electrical connection to the sending unit, and added my fuel pump.

My system flows at near zero psi through two Permacool filters/water traps up to the front of the car, fills up my surge tank and free flow back to the tank. Notice I bent the return line inside the fuel tank to direct the returning fuel away from the pump's pickup. I also use submersible fuel line inside the tank, as regular fuel line will disolve.

On a related note. I had been using aluminum line as fuel line and mounting it securely to the car. I also use split rubber line anywhere it passes by an edge or anything sharp. I've since had an instance where the aluminum line was rubbed through and started to leak in what I thought was a safe line routing.. I'll be replacing all my aluminum lines with steel line directly.

Sending unit mod 2.jpg


Sending unit mod 3.jpg


eng5 (Medium).png
 
Last edited:
jbc426 said:
I made my own return/in-tank pump "module" using a fresh sending unit with a 1/4" return already in it. I removed the 1/4" line, enlarged the hole and silver soldered a 3/8th's steel return line in it. I then drilled and fitted a fuel tight bulkhead style electrical connection to the sending unit, and added my fuel pump.

My system flows at near zero psi through two filters/water traps up to the front of the car, fills up my surge tank and free flow back to the tank. Notice I bent the return line inside the fuel tank to direct the returning fuel away from the pump's pickup. I also use submersible fuel line inside the tank, as regular fuel line will disolve.

On a related note. I had been using aluminum line as fuel line and mounting it securely to the car. I also use split rubber line anywhere it passes by an edge or anything sharp. I've since had an instance where the aluminum line was rubbed through and started to leak in what I thought was a safe line routing.. I'll be replacing all my aluminum lines with steel line directly.

View attachment 1715703956

View attachment 1715703957

View attachment 1715703958
Click to expand...

That's awesome! What pump did you use?
 
Arron tate said:
Hello ChrisRomello,
The drop in tank unit is a fuel return less type. The fuel pressure (58 psi) regulator and fuel return is built in to the assembly (see picture).
The Sniper EFI unit has its own built in regulator and provisions for a return line that would be used if installing the inline pump (master kit).
There are pros and cons to using the in-tank setup. You can do some research here on the various topics.
Holley Sniper EFI owners and Tech
Also I strongly recommend reading the complete Holley instructions before starting the install process.
https://documents.holley.com/199r11031r.pdf
I have installed Sniper EFI on a couple customers cars and my choice is running a in-tank pump without the regulator and a return from the Sniper itself back to the tank (see picture with # 6AN bulkhead fitting)
Stay Safe...
Happy Mopar :)
Arron.

View attachment 1715703928 View attachment 1715703929 View attachment 1715703930 View attachment 1715703931
Click to expand...
Do you usually purchase a fuel pump module that doesn’t have a regulator or do you just remove the regulator from the module and block off the opening?
 
Yall make this real complicated. IF you need a separate return, get the Corvette style fuel filter. It is both the filter and regulator AND return all in one unit. Two lines to the unit from the tank. One supply and one return. One supply line to the engine from the unit. Done. Regulates pressure to 58 PSI. I installed several when I worked for Matt. They work well.

This rat cheer.

https://www.amazon.com/dp/B07Q47LG9H/?tag=fabo03-20
 
ChrisRomello said:
Hello all,
I’m running Sniper EFI on my 360 and was wondering how I’m to run the return. I’m using a stock tank with one of these drop in fuel pump modules:
Holley 12-319 Holley OEM Style EFI Fuel Tank Modules | Summit Racing
I bought my EFI kit slightly used and it didn’t come with the return line kit.
Click to expand...

You don't need a return line with that EFI fuel tank module. Just hook up the pressure line to your existing fuel line and then connect the fuel line to input at the Sniper. Cap off the return fitting on the Sniper.
 
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