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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Featured Products

EVIL ENERGY PTFE Hose End Fitting for PTFE Hose Only (3/4/6/8/10/12AN) - Black - EVILENERGY[Straight,1PC]
EVIL ENERGY PTFE Hose End Fitting for PTFE Hose Only (3/4/6/8/10/12AN) - Black

Engineered for high-pressure, high-temperature fuel systems, the EVIL ENERGY PTFE Hose End Fitting delivers leak-proof performance for PTFE fuel lines in performance builds, LS swaps, boosted engines, and ethanol-based fuel setups. Made from 6061-T6 aluminum with a 360° swivel design, these AN fittings ensure a clean, secure, and easy-to-assemble connection—ideal for builders who demand durability and precision.

$8.99
$8.99
$0.00
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[Black,Without Bracket] black inline evil energy fuel filter with directional arrow and multiple AN fuel line fittingsevil energy fuel filter kit with stainless steel inline fuel filter, AN fittings, and mounting hardware
EVIL ENERGY Inline Fuel Filter with 6AN 8AN 10AN Adapter and Bracket Universal 10/30/40/100 Micron - Black

[Application] Universal fuel filter, includes an6, an8, an10 adapters for different size applications. With mounting bracket keeps the engine bar stylish and clean.

  • [Material] Aluminum alloy fuel filter can and stainless steel filter element.
  • [O-ring] The o-ring provides a tight seal for fittings and end caps.
  • [Function] Can be used for filtering gasoline, diesel, etc. Captures contaminant particles of 10 micron and above to protect the fuel system of the vehicle.
  • [Feature] Removable design, easy to clean or replace filter element at regular time.
  • [Installation Tips] We have debugged the installation direction of the fuel filters before delivery. Please check and ensure the closed end of the filter element docks with the spring. Let the liquid flow following the arrow from the spring end to the other end, and the fuel filter will serve longer.
$23.99
$23.99
$24.99
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[20FT] EVIL ENERGY PTFE Fuel Line Kit, complete black hose & fittings set, 180-day return[16FT] EVIL ENERGY PTFE Fuel Line Kit, black braided hose, fittings, free shipping & return
EVIL ENERGY 4/6/8/10AN PTFE Fuel Line Kit | E85 Nylon Braided Hose | 16/20FT Black Black with Comprehensive Fittings

Three-Layer Construction: Our fuel lines are constructed with a triple-layer material for unparalleled performance and protection. The innermost layer is made of PTFE for maximum chemical resistance, a braided stainless steel layer for strength and durability, and an outer nylon layer for added abrasion resistance and protection.

Multiple Sizes: We offer our fuel lines in 4AN, 6AN, 8AN, and 10AN sizes, catering to the diverse needs of various fuel delivery systems.

Fitting Types: Our kit includes a variety of fittings at 0°, 90°, 45°, and 180° angles, ensuring versatility and flexibility during installation, allowing for custom routing in tight or complex spaces.

Precision Fit and Leak-Free Performance: The combination of the PTFE inner layer and the high-quality aluminum hose ends ensures a precision fit and leak-free connection, even under extreme pressure, providing a safe and reliable fuel system.

$62.09
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$70.99
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[1 PC][2 PCS]
EVIL ENERGY AN Flare to AN ORB Male Fuel Rail Adapter Fitting
  • AN to ORB Conversion
    Converts AN flare fittings to ORB ports for fuel rails and aftermarket fuel components.
  • High Pressure Capability
    Rated up to 1500 PSI for reliable performance in fuel and oil systems.
  • Leak Free Sealing Design
    37 degree AN flare seal combined with ORB O ring ensures a secure, leak resistant connection.
  • CNC Machined Aluminum
    Made from 6061 T6 aluminum with black anodized finish for corrosion resistance.
  • Wide Size Availability
    Multiple AN sizes available to support custom fuel system layouts.
$8.99
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  • EVIL ENERGY 800 CFM 4-Barrel Carburetor with full accessories, free shipping, 180-day returnEVIL ENERGY 800 CFM 4-Barrel Carburetor specs, main jets #104, throttle bore 1.44-inch, precision design
    EVIL ENERGY Electric Choke Single Fuel Inlet 800 CFM 4-Barrel Street Carburetor

    High-Performance Core with Advanced Technology

    • 800 CFM+ Annular Flow Boosters (8 orifices) – superior fuel atomization, no flat spots, near EFI-like drivability.
    • Qwik-Tune Air Valve-Controlled Secondaries – smooth RPM transitions + quick-change metering rods (no carb removal for tuning).
    • Backfire-resistant design (no power valves) + tune-holding calibration – consistent performance without frequent re-tuning.

    User-Friendly & Durable Design

    • Electric choke – automatic temperature adjustment for effortless cold starts in all climates.
    • Two-piece construction – float adjustments/component replacement without fuel draining or carb removal.
    • 100% new machined components – no remanufactured parts, ensuring reliability in demanding conditions.

    Universal Compatibility

    • Square-bore flange – fits most performance intake manifolds.
    • Works with GM, Ford, and Chrysler automatic transmission shift linkages (additional parts may be require

    Value & Application

    • Premium performance – matches top-tier models (e.g., Edelbrock AVS2) with no brand markup.
    • Ideal for: High-horsepower street builds, daily drivers, and spirited racing applications.
    • Restrictions: Requires new fuel filter; not compatible with alcohol/race/E85 fuel.
    $379.99
    $379.99
  • EVIL ENERGY EVIL ENERGY 500 CFM 1403 Square bore Performance CarburetorEVIL ENERGY EVIL ENERGY 500 CFM 1403 Square bore Performance Carburetor
    EVIL ENERGY 500 CFM 4-barrel Carburetor Electric Choke

    Automatic Transmission Optimized

    • Precisely calibrated for GM/Ford/Chrysler AT shift linkages
    • 500 CFM flow tailored to 305-390ci engines in full-size sedans/trucks
    • Square-bore flange for direct OEM manifold replacement

    Street-Smart Performance

    • Electric choke ensures one-touch cold starts (ideal for daily drivers)
    • #86 primary jets + #95 secondary jets
    • Mechanical secondaries provide predictable throttle progression

    Classic-Friendly Engineering

    • 3.25" height clears stock air cleaners
    • Staged throttle bores (1.44"/1.69") enhance low-RPM torque for automatic shifts
    • Single-line fuel inlet retains original plumbing
    $399.99
    $399.99
    $419.99
  • EVIL ENERGY 600 CFM 4-barrel Carburetor with accessories, free shipping, 180-day returnEVIL ENERGY 600 CFM 4-barrel Carburetor specs, main jets #100, throttle bore 1.44-inch, precision design
    EVIL ENERGY 600 CFM Performance 4-barrel Carburetor

    Precision Control System

    • Manual choke for direct throttle adjustment
    • Air valve-controlled secondary throttle (vacuum-modulated)
    • Single fuel inlet simplifies fuel line routing

    Engineered Calibration

    • #100 primary jets optimize mid-range fuel delivery
    • 0.070" x 0.047" metering rods ensure smooth acceleration transitions
    • 1.19" venturi diameter boosts airflow velocity

    Direct-Fit Compatibility

    • Tiered throttle bores (1.44-inch primary / 1.69-inch secondary) for balanced airflow
    • 3.25-inch low-profile design clears OEM hoods
    • Factory-calibrated for GM/Ford/Chrysler AT linkages (TH350/C4/727)
    $305.99
    $305.99
    $359.99
  • EVIL ENERGY 650 CFM 4-barrel Carburetor, accessories & free shippingEVIL ENERGY 650 CFM 4-barrel Carburetor specs, main jets #101, throttle bore 1.44-inch
    EVIL ENERGY 650 CFM 4-barrel Carburetor Adjustable Air Valve

    Race-Optimized Performance

    • 650 CFM square-bore flow with adjustable air valve secondaries (pro-level tuning)
    • Staged throttle bores (1.44" primary / 1.69" secondary) for progressive power delivery
    • Aggressive #101 primary / #98 secondary jet calibration for maximum fuel flow

    Precision Fuel Control

    • Specialized metering rod system (0.070"x0.037") replaces traditional power valve
    • High-flow 0.028" accelerator pump nozzle for instant throttle response
    • Compact 1.19" venturi optimizes airflow velocity

    Track-Ready Installation

    • Manual choke for full driver control in competition settings
    • Compatible with GM, Chrysler, and Ford A/T kickdown linkage, additional parts may be required
    • Low-profile 3.25" height clears performance air cleaners
    $323.99
    $323.99
    $379.99
  • EVIL ENERGY EVIL ENERGY 750 CFM 4-barrel Carburetor Manual Choke KitEVIL ENERGY EVIL ENERGY 750 CFM 1407 Square bore Performance Carburetor
    EVIL ENERGY 750 CFM 4-Barrel Carburetor Complete Kit, Manual Choke Air Valve Secondary for GM Ford Chrysler V8
    ---!@!start!@!---Specifications---!@!end!@!--- Brand EVIL ENERGY Core Material 6061-T6 Aluminum Alloy (Carburetor/Regulator/Pump); Aluminum Housing+Stainless Steel Filter Element (Filter) Carburetor Finish Satin Carburetor Barrels 4 CFM Rating 750 Carburetor Flange Square bore Choke Type Manual Control Secondary Throttle Type Air Valve-Controlled Secondary Carburetor Fuel Inlet Single Carburetor...
    $680.99
    $680.99
    $719.99
  • EVIL ENERGY EVIL ENERGY 750 CFM 4-barrel Carburetor Single Fuel Inlet 110 GPH Fuel Pump KitEVIL ENERGY EVIL ENERGY 750 CFM 4-barrel Carburetor Single Fuel Inlet 110 GPH Fuel Pump Kit
    EVIL ENERGY 750 CFM 4-Barrel Carburetor Complete Kit, Electric Choke Air Valve Secondary for Ford 460 V8
    ---!@!start!@!---Specifications---!@!end!@!--- Brand EVIL ENERGY Core Material 6061-T6 Aluminum Alloy (Carburetor/Regulator/Pump); Aluminum Housing+Stainless Steel Filter Element (Filter) Carburetor Barrels 4 CFM Rating 750 Carburetor Flange Square bore Choke Type Electric Choke Secondary Throttle Type Air Valve-Controlled Secondary Carburetor Fuel Inlet Single Carburetor Calibration Main Jets:#110...
    $680.99
    $680.99
  • Evil Energy Carburetor Fuel System Combo - 4.5-9 PSI Adjustable Regulator w/Gauge + 10/30/40/100 Micron Filter Kit for Classic Cars & Small Engines - EVILENERGYEvil Energy Carburetor Fuel System Combo - 4.5-9 PSI Adjustable Regulator w/Gauge + 10/30/40/100 Micron Filter Kit for Classic Cars & Small Engines - EVILENERGY
    Evil Energy Carburetor Fuel System Combo - 4.5-9 PSI Adjustable Regulator w/Gauge + 10/30/40/100 Micron Filter Kit for Classic Cars & Small Engines

    ✔ 【COMPLETE FUEL SOLUTION】 Regulator + customizable filter in one money-saving kit
    ✔ 【INSTANT SAVINGS】 10% cheaper than buying components separately
    ✔ 【PERFECT PRESSURE】 4.5-9 PSI regulator prevents carburetor flooding
    ✔ 【YOUR CHOICE OF FILTRATION】 Select 10/30/40/100 micron filter
    ✔ 【UNIVERSAL FIT】 Includes 1/2", 3/8", 5/16" adapters for any classic car or small engine

    $111.98
    $111.98
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  • [With Bracket][Without Bracket]
    Evil Energy Universal Inline Fuel Filter - 10/30/40/100 Micron Stainless Steel Element w/1/2-inch, 3/8-inch, 5/16-inch Barb Adapters (Gas/Diesel Compatible) - Aluminum Black

    ✔ MULTI-MICRON PROTECTION: Choose 10/30/40/100 micron filtration for your exact needs
    ✔ 3-IN-1 ADAPTER SYSTEM: Includes 1/2-inch, 3/8-inch & 5/16-inch barb fittings - fits most fuel lines
    ✔ PREMIUM CONSTRUCTION: Aircraft-grade aluminum body + stainless steel filter element
    ✔ Compatible with gasoline, diesel，etc.
    ✔ MAINTENANCE MADE EASY: Removable design for quick cleaning/replacement

    $35.99
    $35.99
    $52.99
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  • [Non-Vacuum,3/8IN NPT to 6AN Fittings][Non-Vacuum,3/8IN NPT to 3/8IN Brab Fittings]
    Evil Energy Carburetor Fuel Pressure Regulator - Adjustable 4.5-9 PSI for Small Engine Gas/E85/Alcohol Compatible

    ✔ STOP CARBURETOR FLOODING! Precision-adjustable 4.5-9PSI range prevents overflow
    ✔ COMPLETE INSTALL KIT Includes pressure gauge, mounting bracket & all fittings
    ✔ MULTI-FUEL READY Works with gasoline, E85, ethanol & alcohol fuels (6061-T6 aluminum body)
    ✔ UNIVERSAL FIT 3/8IN NPT to AN6 ports adapt to most carbureted systems

    $69.99
    $69.99
    $85.99
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  • EVILENERGY EVIL ENERGY 6AN Female Flare to 7/8-20 Carb Carburetor Inlet Fitting Adapter[2pcs]EVILENERGY EVIL ENERGY 6AN Female Flare to 7/8-20 Carb Carburetor Inlet Fitting Adapter
    EVIL ENERGY 6/8AN Female Flare to 7/8-20/ 9/16-24 Carb Carburetor Inlet Fitting Adapter

    Convert your carburetor fuel inlet to AN plumbing with the EVIL ENERGY AN Female Flare Carburetor Adapter. CNC-machined from 6061-T6 aluminum with a black anodized finish, it provides a secure connection between Holley/Edelbrock-style carburetors and AN-6 or AN-8 fuel lines.

    • Fits: 7/8-20 and 9/16-24 carburetor inlet threads
    • Connection: AN 37° female flare to carburetor inlet
    • Material: Lightweight 6061-T6 aluminum construction
    • Application: Carbureted fuel systems, EFI conversions, and custom AN plumbing
    $13.99
    $13.99
    $13.59
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  • EVIL ENERGY 6/8AN Male Flare to 9/16-24/7/8-20 Carb Carburetor Inlet Fitting Adapter[6AN to 7/8-20]EVILENERGY EVIL ENERGY 6/8AN Male Flare to 9/16-24/7/8-20 Carb Carburetor Inlet Fitting Adapter
    EVIL ENERGY 6/8AN Male Flare to 9/16-24/7/8-20 Carb Carburetor Inlet Fitting Adapter

    Convert carburetor fuel inlets to AN hose connections with this CNC-machined 6061-T6 aluminum adapter. Designed for Holley, Edelbrock, Demon, and Quick Fuel carburetors, it provides a reliable connection for AN fuel fittings and custom performance fuel systems without replacing the carburetor.

    $10.39
    $10.39
    $10.39
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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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