EFI systems

EFI fuel pumps (Electronic Fuel Injection pumps) are high-performance electric fuel pumps engineered specifically for modern fuel injection systems. Unlike the low-pressure gasoline pump models used in traditional carburetor systems, EFI systems require higher, consistent fuel pressure (typically 43-58 PSI) to ensure the injectors can properly atomize the fuel. This precise delivery is critical for achieving optimal horsepower, torque, and fuel efficiency.

Why You Need to Upgrade to a High-Performance EFI Fuel Pump

When performing an engine upgrade (like an LS Swap), adding a turbocharger, or converting an older vehicle from a carburetor to EFI, the stock or standard fuel pump immediately becomes a bottleneck.

  • The Problem: Insufficient fuel flow causes the engine to "lean out" under load. This not only results in significant power loss but can also lead to catastrophic engine damage.
  • The Solution: A high-flow EFI fuel pump (e.g., 300LPH or 405LPH) ensures your engine receives an ample fuel supply under all conditions, which is essential for unlocking its full potential.

The All-in-One Solution: The EFI Fuel Pump Kit

To simplify installation and guarantee system-wide compatibility, opting for a complete EFI fuel pump kit is the smartest choice. A professional kit typically includes:

Using a complete kit eliminates the guesswork and compatibility issues that can arise from sourcing parts individually, ensuring a seamless and reliable installation.

EVIL ENERGY Fuel Pump: Your Guarantee of Performance and Reliability

In the realm of performance fuel systems, the EVIL ENERGY Fuel Pump name is synonymous with reliability and power. EVIL ENERGY specializes in providing professional-grade fuel solutions for auto enthusiasts.

Whether you need a powerful standalone external electric fuel pump or a comprehensive EFI fuel pump kit for your EFI conversion, EVIL ENERGY offers rigorously tested products to ensure your high-performance vehicle runs strong and stable.

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FAQs about EFI systems

What is an EFI fuel pump? How is it different from a regular gasoline pump?

An EFI fuel pump (Electronic Fuel Injection pump) is a high-pressure electric fuel pump specifically designed for modern fuel injection (EFI) systems.

The key difference is pressure:

  • EFI Fuel Pumps: Operate at high pressure (typically 43-58 PSI or more) to ensure fuel atomizes correctly through the injectors.
  • Regular Gasoline Pump (Carburetor Pump): Operates at low pressure (typically 5-9 PSI).

You cannot use a low-pressure carburetor pump for an EFI system, or vice versa. They are not compatible.

Yes, it is mandatory. EFI systems (including all LS engines) rely on high-pressure, stable fuel delivery to operate. If you try to use the original low-pressure carburetor pump, your engine will fail to start or will suffer catastrophic damage from leaning out (fuel starvation) under load. A high-performance electric fuel pump is the foundation of a successful EFI conversion.

LPH stands for 'Liters Per Hour'. It's a flow rating that measures how much fuel the pump can deliver. The LPH you need depends on your engine's horsepower (HP). More horsepower requires more fuel, which means you need a higher LPH rating.

  • General Guideline: For most V8 swaps or applications between 250-500 HP, a 255 LPH pump is a common choice.
  • Higher Performance: For forced induction (turbo/supercharged) or engines exceeding 500 HP, you should consider 300 LPH, 405 LPH, or higher EFI fuel pumps.

This depends on your vehicle and application.

  • In-Tank: Mounted inside the fuel tank. This is standard on modern cars as it runs quieter and the fuel helps cool the pump, extending its life.
  • Inline (External): Mounted outside the tank along the fuel line. This type of electric fuel pump is often easier to install and service, especially on older vehicles that were not designed for an in-tank pump or when using a custom fuel cell.

Many of our high-performance EFI fuel pumps are designed to be compatible with multiple fuel types, including E85. However, E85 is more corrosive than standard gasoline. Always check the specific product description to confirm that the model you are interested in is explicitly 'E85 compatible'.

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