Fuel Line Routing BPE 347

[MaxVmo]

I’m working on routing fuel lines, running a Blueprint 347 with Sniper setup and a standard firewall mounted fuel pressure regulator. There are three ports in the regulator and two ports on the back side of the Sniper. Fuel is being supplied by an in-tank Walbro pump.

I’m new at the fuel lines/regulators game and would love advice on proper routing.

[JJK]

I have a similar setup. I chose to deadhead to the Sniper EFI. For the regulator, fuel from the pump goes in one side (passenger for mine) and the other side returns to the tank (driver side for mine). The bottom port goes to the EFI, I believe that the driver's side is the preferred inlet for a deadhead routing on the Sniper. Then, I plugged off the passenger side EFI port.


Alternatively, if you do not want to deadhead the line, I think you would do the following.
You can run the fuel supply line directly to one of the EFI ports (driver side for Sniper if I recall) and then run the return line from the EFI (passenger side if I recall) to one side of the fuel regulator. For this method, the bottom port on the regulator would return to the tank and the other regulator port would be capped off.

[rich grsc]

I advise against deadheading your fuel.JMO

[JJK]

Rich, I am curious as to your concerns with deadheading the fuel. All modern cars are designed this way as it has several benefits over the older thru-flow design.

[gbranham]

Does BPE use a Sniper 2 system? I assume they do, and in that system, Holley got rid of the internal regulator, as they were prone to failure. Here's the Sniper 2 installation diagram, direct from Holley's site. 202304

[JJK]

My previous pose did not describe the plumbing correctly, this is how it should be for a deadhead run from the regulator to the EFI, corrections CAPITALIZED for emphasis.

I have a similar setup. I chose to deadhead to the Sniper EFI. For the regulator, fuel from the pump goes in one side (passenger for mine) and the other side GOES TO THE EFI (driver side for mine). The bottom port IS THE RETUEN LINE BACK TO THE TANK, I believe that the driver's side is the preferred inlet for a deadhead routing on the Sniper. Then, I plugged off the passenger side EFI port.

As an FYI, I purchased the EFI completion kit from FFR and followed their instructions for assembly.
https://www.factoryfive.com/wp-content/uploads/2021/10/EFI-fuel-system.pdf

[MaxVmo]

Good information.

Side question—what is the connector/adapter called to mount AN fittings onto the fuel pump as depicted? FF included quick connections that snap into place but I’m thinking the AN style would be better?

I see in the pictures that they are running a quick connect to the feed line and an AN adapter to the return.

[gbranham]

Good information.

Side question—what is the connector/adapter called to mount AN fittings onto the fuel pump as depicted? FF included quick connections that snap into place but I’m thinking the AN style would be better?

I see in the pictures that they are running a quick connect to the feed line and an AN adapter to the return.

Pro-M Makes a hanger that has -6AN fittings welded on for both feed and return. It also has an extended return tube to prevent cavitation. With slight modification to the opening on the tank, it's a drop-in.

[MaxVmo]

Thank you. Found adapters at Breeze. Appreciate all the responses.

[danmas]

Does BPE use a Sniper 2 system? I assume they do, and in that system, Holley got rid of the internal regulator, as they were prone to failure. Here's the Sniper 2 installation diagram, direct from Holley's site. 202304

Thank you for this. I have my system all laid out and I was going to go to the regulator before the fuel rail. This clearly shows that the regulator is after the fuel rail. That’s quite a difference. Also, many people have told me that once you have the system dialed in remove the gauge from the regulator and cap the port. Something about fire bad and all that.

Dan

[Theshandman]

With my BPE 347/Sniper, I installed the Pro-M in-tank fuel pump gbramham mentions, ran TechAFX (http://www.techafx.com/catalog/7[) braided/coated fuel lines to/from the Sniper.
0-100psi pressure gauge (https://www.summitracing.com/parts/hly-26-507?seid=srese1&gclid=Cj0KCQjwwae1BhC_ARIsAK4JfrwoYD6txaAyhjX5KL8s bpFFnPHQZumIOhMEEmOf2FksQSXB1fNWoZUaAoaoEALw_wcB) at the in port (driver side) of the Sniper and 0-15psi pressure gauge (https://www.summitracing.com/parts/hly-26-500?rrec=true)at the out port (passenger side). I let the Sniper's built-in regulator control the pressure which it does quite nicely. No need for the F5 firewall-mounted regulator, unless of course you prefer that implementation; I have it handy in case the Sniper's regulator decides to go on holiday.