PureFlow Raptor VP-150gph Universal Fuel Pump

R1SBU371 is AirDog's universal Raptor 150 GPH pump, the higher-flow bare pump from the Raptor-4G family, preset at the factory to 17 psi. Buyers usually land here with a diesel that has a bigger injection pump, larger injectors or more tune than the stock lift pump was sized for, and supply pressure that falls off at high RPM. It is also a common pick for a custom build where you want a self-regulating 150 GPH pump without buying a complete vehicle kit.

Why 150 GPH and 17 psi

AirDog describes the 150 GPH Raptor as delivering higher than stock flow so an engine with injection pump and injector upgrades gets steady pressure, and it says that extra flow helps eliminate fuel starvation at higher RPM. The pump carries a built-in adjustable regulator, so there is no return line to plumb. Out of the box it is set to 17 psi, which is a higher starting point than the 8 psi preset on the 100 GPH universal model. Always set the final number to what your injection system and any upgraded pump maker specify, and verify it with a gauge.

Do not confuse this part with R1SBU373. AirDog also sells a universal 150 GPH Raptor preset to 55 psi as a high-pressure pump. R1SBU371 is the 17 psi lift pump version.

When a 150 GPH pump makes sense

• Supply pressure drops under load or at high RPM after injector or injection pump upgrades
• Power falls off at the top of a pull while towing or racing
• An upgraded high-pressure pump manufacturer calls for more supply flow than stock
• The current lift pump runs constantly at its limit and fails early
• A custom engine swap needs a stand-alone, regulated electric supply pump

Check the supply side first

Log supply pressure at idle, cruise and full load before you buy. A pressure drop that only appears at high fuel demand is the case this pump targets. If pressure is low at idle too, look for a restricted filter, a collapsed pickup or an air leak on the suction side. For a stock or lightly modified engine, the Raptor 100 GPH universal pump costs less and AirDog pitches it as the stock replacement option.

Fitment and what you supply

This listing is the universal pump only. AirDog includes a 9/16-18 ORB outlet fitting; the installer sources the 3/4-16 inlet fitting, line, brackets, relay and fused wiring. If you want everything in one box with air separation and filtration for a 2004.5 to 2024 Ram Cummins, the AirDog FP-150-4G system is the complete alternative. Building around a bigger injection pump such as the Exergy 10mm stroker CP3? Size the lift pump to that manufacturer's supply requirement. Send your engine, injection pump and injector sizes and we will help you choose. More supply-side parts are in engine and performance.

Install notes

• Place the pump near the tank and as low as practical so it pushes fuel forward.
• Run power through a relay with an inline fuse and a key-on trigger.
• Put a water-separating filter ahead of the injection pump; the AirDog water separator filter is one choice.
• Prime the lines, check every fitting for leaks, then start the engine.
• Gauge pressure at the injection pump inlet and adjust from the 17 psi preset only if your system calls for a different value.

What is the factory pressure setting on R1SBU371?

AirDog presets this universal Raptor 150 GPH pump to 17 psi. It uses a built-in adjustable regulator, so you can set it to what your injection system requires.

Is this the 55 psi high-pressure Raptor?

No. The 55 psi high-pressure universal Raptor is a different part, R1SBU373. R1SBU371 is the 17 psi lift pump version.

Who should buy the 150 GPH instead of the 100 GPH?

AirDog recommends the 150 GPH Raptor for engines with injection pump and injector upgrades that need more flow at high RPM. A stock engine usually only needs the 100 GPH pump.

What parts do I need to install it?

A 3/4-16 inlet fitting, fuel line, mounting brackets, a relay, fused wiring and filtration. The 9/16-18 ORB outlet fitting is included with the pump.

Does it need a return line?

No. The regulator is built into the Raptor-4G pump, and AirDog lists no return line as a feature of the Raptor pumps.