Carburetor system

A reliable fuel pump for carburetor applications is the key to ensuring your classic engine runs smoothly. Unlike modern EFI systems that require high pressure, carburetor systems need a low-pressure, high-volume fuel supply (typically 5-9 PSI). A dedicated electric fuel pump for carburetor use is the perfect upgrade from an old, unreliable mechanical pump. It provides consistent, steady fuel flow, preventing both fuel starvation at high RPMs and engine flooding at idle.

Why Choose an Electric Carburetor Fuel Pump?

Many classic vehicles came with a mechanical fuel pump that relies on the engine's rotation to operate. These pumps are known for causing hard starts after sitting (taking time to build pressure) and can fail to keep up with fuel demand at high speeds.

An EVIL ENERGY carburetor fuel pump solves all these problems:

  • Instant Start-Up: As an electric fuel pump, it primes the system the moment you turn the key, building immediate fuel pressure for effortless cold starts.
  • Stable Pressure: It is internally regulated to deliver the constant, low pressure that carburetors require, eliminating the need for a separate, complex high-pressure regulator.
  • Flexible Installation: The external, inline design allows it to be mounted in any convenient location, such as the frame rail or near the fuel tank.

EVIL ENERGY: Your Partner for Carburetor Systems

EVIL ENERGY provides more than just a high-performance carburetor fuel pump. We offer a complete range of components to support your carburetor system, including dedicated fuel lines, AN fittings, and fuel filters. We understand the needs of classic car and performance carburetor owners—you demand reliability and a clean, simple setup.

Are You Upgrading or Replacing?

  • For Replacement: If you are tired of your leaky or unreliable old mechanical pump, an EVIL ENERGY carburetor fuel pump is a direct, highly effective upgrade.
  • For Performance: When you've upgraded to a larger carburetor or a higher-performance engine, the stock pump's flow rate may no longer be sufficient. Our high-flow carburetor pumps ensure your new setup gets all the fuel it demands.

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[CPE][PTFE]
EVIL ENERGY Fuel Cell Tank Kit-Efficient Fuel System Solutions 5/10/15 Gallon

This comprehensive kit includes: 

  • 5/10/15 Gallon Fuel Cell Tank
  • 20-75PSI&75-120PSI fuel pressure regulator
  • 300LPH high flow fuel pump
  • 6AN 20FT CPE/PTFE Durable fuel lines (optional fittings)
  • 10&100-micron fuel filter
  • 50mm Fuel Filter Mounting Bracket*2
  • 60mm Fuel Filter Mounting Bracket*1
  • necessary fittings for easy installation. 
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[30-70PSI,Red][30-70PSI,Black]
EVIL ENERGY Fuel Pressure Regulator 6AN EFI Bypass Return Adjustable 20-140psi Black&Red - Red

Durable Construction: Precision-machined 6061-T6 aluminum alloy, corrosion-resistant and heat-tolerant (withstands harsh engine bay conditions), ensuring long-term reliability.

EFI System Compatibility: Fits most vehicles' electronic fuel injection (EFI) systems; maintains stable fuel pressure for optimized combustion, performance, and fuel economy.

Fuel Compatibility: Works with gasoline, E85, and alcohol/ethanol; not compatible with diesel fuel; note: nylon braided fuel lines are not E85-compatible (use PTFE-lined hoses for E85).

Bypass Return Design: Prevents pressure spikes during acceleration, boost, or high-load scenarios, protecting fuel injectors and rails from damage.

All-in-One Kit: Each variant includes essential components (fuel pressure regulator, pressure gauge, fittings, sealant tape, tools like Allen keys); no extra purchases needed for standard installation.

Easy Installation & Tuning: Adjust pressure via top set screw (clockwise = increase, counterclockwise = decrease); use thread sealant tape on NPT gauge port to avoid leaks; professional installation highly recommended (especially for high-pressure variants).

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[Fuel Pump Kit][Fuel Filter Regulator Kit]
EVIL ENERGY Universal LS Swap Fuel Kit - 58psi Regulator, 300LPH Pump & AN Fuel Lines Compatible with E85/Gas/Diesel

High-Performance LS Fuel System Kit

  • Optimized for 1999-2014 Chevy LS engines (4.8L/5.3L/6.0L) and swaps(LS-based engines).
  • this complete fuel system upgrade includes a 58psi fuel pressure regulator with 10-micron filtration, a high-flow fuel pump (200-300LPH), and 6AN PTFE braided fuel lines (1500psi rated). Ensures reliable fuel delivery for gasoline, E85, and diesel applications. Ideal for LS engine builds, performance upgrades, and boosted applications with durable, precision-engineered components.
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  • The complete EVIL ENERGY 12V Electric Fuel Pump for Carb kit, including the red and black pump, red fittings, mounting hardware, and packaging.[345LPH] High performance specs for the EVIL ENERGY 12V Electric Fuel Pump for Carb, showing a 13 PSI closing pressure and a test flow of 345 LPH at 9 PSI.
    EVIL ENERGY 320-370lph/90GPH External Electric Fuel Pump 12V for Carburetor - High Pressure Compatible for Carburetor Replacement/Modified Vehicles
    ---!@!start!@!---Specifications---!@!end!@!--- Inlet 3/8-inch Outlet 3/8-inch Installation Location External fuel pump Structural Category Electric fuel pump Structural Sub - Category Gear-type electric fuel pump Voltage 12V-13.5V Closed Pressure 14PSI Flow Rate 91.1-97.8GPH/345-370LPH(10-11PSI&5.6-6.0A) 84.5-91.1GPH/320-345LPH(7-9PSI&5.5-6.3A) Temperature Range -68°-194°F Max Power 88W Material Aluminum Gross Weight 1.4kg Packaging...
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  • Evil Energy 12V Electric Fuel Pump for Carburetor + 5-12PSI Adjustable Pressure Regulator Bundle High-Flow 90GPH External, E85/Gas CompatibleInstallation diagram for the EVIL ENERGY 12V Electric Fuel Pump for Carb, showing the correct placement of a 100-micron pre-filter, a 40-micron post-filter, and a fuel pressure regulator.
    Evil Energy 12V Electric Fuel Pump for Carburetor + 5-12PSI Adjustable Pressure Regulator Bundle High-Flow 90GPH External, E85/Gas Compatible
    ---!@!start!@!---Specifications---!@!end!@!--- Electric fuel pump 12v for carburetor Inlet 3/8-inch Outlet 3/8-inch Installation Location External fuel pump Structural Category Electric fuel pump Structural Sub - Category Gear-type electric fuel pump Voltage 12V-13.5V Closed Pressure 14PSI Flow Rate 91.1-97.8GPH/345-370LPH(10-11PSI&5.6-6.0A) 84.5-91.1GPH/320-345LPH(7-9PSI&5.5-6.3A) Temperature Range -68°-194°F Max Power 88W...
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FAQs about Carburetor system

What is the difference between a carburetor fuel pump and an EFI fuel pump?

The main difference is pressure.

  • A fuel pump for carburetor systems is designed to operate at a very low pressure (typically 5-9 PSI). Carburetors cannot handle high pressure and will "flood" (overflow with fuel) if the pressure is too high.
  • An EFI fuel pump operates at a very high pressure (43-58+ PSI) to supply fuel injectors.
  • They are not interchangeable. You must use a dedicated carburetor fuel pump for a carburetor.

Upgrading from a stock mechanical pump to an electric fuel pump for carburetor use has several key benefits:

  1. Easier Starts: An electric pump primes the system as soon as you turn the key, filling the carburetor bowl for quick, effortless starts, even if the car has been sitting.
  2. Consistent Flow: It provides a steady fuel supply at all engine speeds, preventing the fuel starvation at high RPMs that can sometimes happen with an aging mechanical pump.
  3. Reliability: Mechanical pumps can wear out and leak. An electric pump is a modern, reliable solution.

It depends on the pump. Most EVIL ENERGY carburetor fuel pump models are internally regulated to output the correct low pressure (e.g., 7 PSI) directly. If a pump is designed this way, you do not need an additional regulator. However, if you use a pump that outputs more than 10-12 PSI, you will need a separate low-pressure regulator to "step down" the pressure before it reaches the carburetor.

Most carburetors (like Holley, Edelbrock, and Carter) are designed to run on 5 to 9 PSI of fuel pressure. Going above 9 PSI can overwhelm the carburetor's needle and seat, causing it to flood. An EVIL ENERGY carburetor fuel pump is pre-set to operate within this safe, optimal range.

No, our pumps are designed for straightforward installation. They are "inline" (external) pumps, meaning they mount outside of the fuel tank, typically on the vehicle's frame rail. This makes them much easier to access and install than an in-tank pump, especially on classic vehicles.

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