The Ultimate Guide to Selecting the Perfect External Fuel Pump for 350hp-400hp Engines

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When it comes to high-performance engines in the 350hp-400hp range, choosing the right external fuel pump is crucial for ensuring reliable and efficient fuel delivery. This comprehensive guide will delve into the technical specifications, key considerations, and top-performing options to help you make an informed decision.

Understanding the Importance of External Fuel Pumps

External fuel pumps play a vital role in high-performance engines by providing the necessary fuel flow and pressure to support the increased power demands. These pumps are designed to be installed outside the fuel tank, offering several advantages over in-tank pumps, such as improved cooling, easier maintenance, and greater flexibility in mounting options.

Key Technical Specifications to Consider

external fuel pump

When selecting an external fuel pump for a 350hp-400hp engine, there are several critical technical specifications to keep in mind:

Flow Rate

The flow rate, measured in liters per hour (LPH) or gallons per hour (GPH), determines the pump’s ability to supply the required fuel volume to the engine. For a 350hp-400hp application, you’ll typically want a pump with a flow rate of at least 300LPH (80GPH) to ensure adequate fuel delivery.

Pressure

The pump’s pressure capability, measured in pounds per square inch (PSI), is crucial for overcoming the resistance in the fuel system and delivering the necessary fuel pressure to the injectors. A good external fuel pump for a 350hp-400hp engine should be able to maintain a pressure of at least 60-80 PSI.

Voltage and Current Draw

The pump’s operating voltage, typically 12V for most automotive applications, and its current draw are important factors to consider. A high-performance external fuel pump should have a relatively low current draw to minimize the load on the vehicle’s electrical system.

Compatibility

Ensure that the external fuel pump you choose is compatible with the type of fuel your engine requires, whether it’s gasoline, ethanol-blended fuels (E85/E90), or diesel.

Mounting Options

The flexibility in mounting locations can impact the overall installation and maintenance of the external fuel pump. Look for pumps with various mounting options to accommodate your specific engine setup.

Top External Fuel Pump Recommendations

Based on the technical specifications and performance requirements for a 350hp-400hp engine, here are some of the top external fuel pump options to consider:

1. AEM 400LPH (AN) Inline High Flow Fuel Pump

  • Flow Rate: 400LPH (100GPH) at 40 PSI, 340LPH (90GPH) at 73 PSI, 270LPH (71GPH) at 120 PSI
  • Pressure Capability: Up to 120 PSI
  • Voltage: 12V
  • Current Draw: Not specified, but designed for high-performance applications
  • Compatibility: Gasoline, ethanol-blended fuels (E85/E90)
  • Mounting: Inline, flexible installation options

2. EVIL ENERGY External Inline Fuel Pump Electric 300LPH High Flow 12V Universal

  • Flow Rate: 300LPH (79GPH)
  • Pressure Capability: Up to 60 PSI
  • Voltage: 12V
  • Current Draw: Not specified, but designed for high-flow applications
  • Compatibility: Gasoline, ethanol-blended fuels (E85/E90)
  • Mounting: Inline, universal design for flexible installation

3. Aeromotive High-Efficiency External, In-Line Fuel Pumps

  • Flow Rate: Varies by model, up to 600LPH (158GPH)
  • Pressure Capability: Up to 120 PSI
  • Voltage: 12V
  • Current Draw: Varies by model, designed for efficient operation
  • Compatibility: Gasoline, ethanol-blended fuels (E85/E90), diesel
  • Mounting: Inline, with variable speed control options

When evaluating these external fuel pump options, it’s essential to carefully consider the specific requirements of your 350hp-400hp engine, including fuel flow, pressure, and electrical system compatibility. Additionally, ensure that the pump you choose is properly sized and installed to provide reliable and consistent fuel delivery for your high-performance application.

References

  1. Amazon – EVIL ENERGY External Inline Fuel Pump Electric 300LPH High Flow 12V Universal:

  3. High Flow Fuel – Universal External Fuel Pumps:

  4. https://www.highflowfuel.com/catalog/fuel-pumps/universal-external-fuel-pumps/

  5. AEM Electronics – AEM 400LPH (AN) Inline High Flow Fuel Pump:

  6. https://www.aemelectronics.com/products/fuel_delivery/high_flow_fuel_pumps/inline/parts/50-1005

  7. Amazon – 60 Psi Inline Fuel Pump:

  8. https://www.amazon.com/60-psi-inline-fuel-pump/s?k=60+psi+inline+fuel+pump

  9. Aeromotive – High-Efficiency External, In-Line Fuel Pumps:

  10. https://aeromotiveinc.com/collections/in-line-fuel-pumps