Sniper EFI Fuel Pump VS FF In-Tank System

[dherrenbruck]

Finally gave go ahead to machine shop to machine my 302 roller block. It’ll either be a 331 or 347 stroker. RPM range 2000 to 6500 and less than 500 HP. I’ve decided to go with Holley Sniper 4150 and complete Hyper-Spark ignition system. My question is fuel delivery system. Do I go with FF In-Tank at $650 or just by the Master Kit which includes external pump? Appears I’d save about $400 unless I’m missing something. While I’ve got you, is bigger always better in terms of resale value with an MK4? Would you go 331 or 347 and crank up HP and torque? I know I’ll need to upgrade my transmission choice from T5 to TKX. I don’t need the additional HP for myself, but some day I will sell the car and if bigger increases value I don’t mind spending the extra money. Thanks everyone, David

[JJK]

I bought the FFR EFI in tank pump and completion kit. It includes the pump, pickup, regulator, fuel filter, flex braided fuel lines, and charcoal cartridge.

Pros: easy all in one shopping with easy installation that should be fine for a 331 or 347. Not sure it would be best fit for a 427 due to fuel line sizes. No need to mess with hard fuel lines.

Cons: The fuel lines are 3/8 to the engine and 5/16 return. This should be fine for your application but some prefer 3/8 return. The included mustang fuel pickup further restricts things, so many upgrade to the pro-M hanger which has larger tubes. Many want the look of hard fuel lines instead of the flex lines that run through the transmission tunnel.

When I started installing the FFR supplied system, I had some buyers remorse as I was worried about the pickup and return line size. But, after thinking through my engine and overall build, I think things are fine and I would purchase the system again for it's simplicity.

[CaptB]

I used this from Breeze: https://breezeautomotive.com/shop/fuel-filter-regulator-and-single-line-kit-for-sniper-in-roadster/

I have a Ford 351 Boss Block based 427 and it works excellent. This setup also allows you to only have a feed hose going forward, return line not required.

[dherrenbruck]

I bought the FFR EFI in tank pump and completion kit. It includes the pump, pickup, regulator, fuel filter, flex braided fuel lines, and charcoal cartridge.

Pros: easy all in one shopping with easy installation that should be fine for a 331 or 347. Not sure it would be best fit for a 427 due to fuel line sizes. No need to mess with hard fuel lines.

Cons: The fuel lines are 3/8 to the engine and 5/16 return. This should be fine for your application but some prefer 3/8 return. The included mustang fuel pickup further restricts things, so many upgrade to the pro-M hanger which has larger tubes. Many want the look of hard fuel lines instead of the flex lines that run through the transmission tunnel.

When I started installing the FFR supplied system, I had some buyers remorse as I was worried about the pickup and return line size. But, after thinking through my engine and overall build, I think things are fine and I would purchase the system again for it's simplicity.

Thanks for reply. I did read in the sniper install manual that they recommend 3/8" lines for both intake and return. David

[JJK]

Many (like the FFR supplied EFI completion kit) run a returnless system so the Sniper only sees an inlet fuel line and the return line is pulled from a regulator. The FFR kit has this regulator on the firewall in the engine bay, but others (like the Breeze kit) mount the regulator closer to the fuel tank. Ideally you want the regulator closer to the engine so that the pressure is maintained, but with such a short run from the fuel tank to the engine there should be very little pressure differential if the regulator is placed close to the tank with a very short return line. Setting things up as a returnless system requires plugging the exit port from the Sniper. If set up like this, the Sniper only cares about proper pressure (set from the regulator, but the Sniper has an internal regulator as well) and sufficient volumetric flow. With the 3/8 fuel line to the Sniper, things should be fine.

[Papa]

You can buy an in-tank pump and Pro-M hanger and run your own lines and have a much better system for around $400.

https://www.promracing.com/high-flow-fuel-pump-hanger-for-1986-1997-mustangs.html

https://www.summitracing.com/parts/vpn-gss341bx

[JohnK]

Many want the look of hard fuel lines instead of the flex lines that run through the transmission tunnel.

Just a quick thought about this... whether you go hard fuel lines or flex lines, 5/16" or 3/8" - it's NOT advisable to run the fuel lines through the transmission tunnel. In the event of a driveline failure the last thing you want is for the fuel lines to get cut. The best option is to run them on the outside of the PS 4" frame tube.

[nick7405]

I’m with papa. The fuel system is usually what I put the most thought in and I just created my own system with lines, unions and in tank pump.

[jrohrig]

I'm interested what others have to say on the matter. I ordered my kit last year and am expecting delivery in the next couple months. I am putting in a 427 stroker, and was assured by a Factory Five sales rep that the components included in the complete kit are more than sufficient for my "street car" application

[robmccon]

David, I am running a Blueprint 347 with the Holley Sniper. For my fuel system, I went with the Sniper in-tank pump (part # 12-345), 2 Fragola 90 degree adapters (part # 499206-BL), Holley Filter/Regulator (allows return to fuel tank, only running one line to the Sniper, part # 12-889) and PTFE 6AN Hose and fittings.

[dherrenbruck]

David, I am running a Blueprint 347 with the Holley Sniper. For my fuel system, I went with the Sniper in-tank pump (part # 12-345), 2 Fragola 90 degree adapters (part # 499206-BL), Holley Filter/Regulator (allows return to fuel tank, only running one line to the Sniper, part # 12-889) and PTFE 6AN Hose and fittings.

Rob I pulled that up and it certainly looks simple. I think that’s my first choice if I decide to go EFI. And that’s the way I’m leaning at this point. Not cheap, but what is on this build. Appears to be a pretty nice investment. Thanks.