EVIL ENERGY 500 CFM 2-Barrel Carburetor Fuel System Upgrade Bundle

About this item

Hard starts, flooding after hot soaks, and throttle response that changes with RPM — these aren't carburetor problems, they're fuel system problems. The EVIL ENERGY 500 CFM 2-barrel carburetor fuel system upgrade bundle replaces the entire fuel delivery chain: a street-proven carburetor, a steady-flow 12V electric fuel pump, and a precision adjustable pressure regulator — all matched to work together in one box.

Key Features of the Carburetor Fuel System Upgrade Bundle

• Complete Fuel System, One Box: No compatibility guesswork. The fuel pump, regulator, and carburetor are matched for flow rate and pressure range — included adapters cover the most common fuel line sizes. See all EVIL ENERGY carburetor options.
• Electric Fuel Pump — Steady Flow at Any RPM: Unlike mechanical pumps that vary pressure with engine speed, the 12V gear pump delivers consistent 345–370 LPH from idle to wide-open throttle. External mounting means no dropping the fuel tank.
• Pressure Regulator — Carburetor Protection: Electric pumps can output up to 14 PSI — far above what a carburetor float valve can handle. The adjustable regulator steps pressure down to a precise 4.5–9 PSI with an included gauge for real-time monitoring.
• 500 CFM Carburetor — Street-Proven Performance: Modeled after the Holley Street Avenger fuel metering system, this 2-barrel carburetor delivers improved low-end torque and crisp throttle response. Electric choke for reliable cold starts, 100% wet-flow tested and ready to run. View standalone carburetor.
• Carbureted Systems Only — Not for EFI: This bundle is designed exclusively for low-pressure carbureted fuel systems. Every component — pump pressure, regulator range, carburetor fuel inlet — is calibrated for carburetor operation, not EFI.

Why Upgrade the Entire Fuel System at Once?

A carburetor can only meter the fuel it receives. If the fuel pump is weak, pressure is unregulated, or lines are contaminated — the carburetor can't compensate. Upgrading all three components together eliminates the variables: steady volume from the pump, locked-in pressure from the regulator, and precise metering from the carburetor. The result is an engine that starts reliably, idles smoothly, and accelerates without hesitation.

500 CFM — The Right Size for Street Builds

A 500 CFM 2-barrel carburetor is the sweet spot for street-driven performance. It delivers quicker low-end torque (where you actually drive on the street), simpler tuning with fewer circuits to adjust, and better fuel economy than larger 4-barrel options. It's the right choice for small-block V8s, inline-6 performance builds, and anyone who drives their car more than they trailer it.

Package Contents

From the 500 CFM 2-Barrel Street Carburetor box:

• 1 × EVIL ENERGY 500 CFM 2-Barrel Street Carburetor (Electric Choke, Polished Aluminum)

Carburetor Emissions Note: This carburetor is intended for use on uncontrolled (non-emissions controlled) vehicles: 1965 and older U.S. manufactured California certified vehicles; 1967 and older U.S. manufactured federally certified vehicles; 1967 and older foreign manufactured vehicles. Not for use on boats or speed changers.

From the 12V Electric Fuel Pump box:

• 1 × 12V External Electric Fuel Pump (Aluminum, Gear-Type)
• 2 × 3/8 NPSF to 5/16" Barb Adapters (Red)
• 2 × Insulated Terminals
• 2 × Mounting Nuts
• 2 × Mounting Washer

Fuel Pump Note: This is a low-pressure fuel pump for carbureted systems ONLY. It is NOT suitable for high-pressure EFI systems. A fuel pressure regulator is strongly recommended to prevent carburetor flooding.

From the Adjustable Fuel Pressure Regulator (5–12 PSI) box:

• 1x Fuel Pressure Regulator
• 1x Pressure Gauge (5-12 PSI)
• 1x Mounting Bracket
  
• 3x 6AN to 6AN ORB Fittings
• 1x Allen Key + Sealant Tape
• All Required Screws (Self-tapping & Cheese Head)

Regulator Note: This regulator is designed exclusively for low-pressure carburetor applications. It is NOT a bypass return-style regulator for EFI systems. CPE/nylon braided fuel lines are NOT compatible with E85 fuel — use PTFE-lined hose for E85 applications.

Why Choose the EVIL ENERGY Carburetor Fuel System Upgrade Bundle?

• Matched as a System, Not Just Sold as a Bundle: Each component is selected to work with the others — the fuel pump's flow rate matches the regulator's pressure range, and the carburetor's fuel inlet is compatible with the regulator's outlet size. No compatibility guesswork.
• Carburetor — Proven Performance at Half the Price: Modeled after the Holley Street Avenger metering system. 100% wet-flow tested. Ready to run out of the box. Electric choke, #74 main jets, 50cc accelerator pump. $299.99 vs. Holley's $599.95.
• Fuel Pump — RPM-Independent Flow: Gear-type 12V electric pump delivers 345–370 LPH whether you're idling or at wide-open throttle. External mounting = no tank dropping. Aluminum body for -68°F to 194°F reliability.
• Regulator — 6061-T6 Aluminum, Precisely Adjustable: 4.5–9 PSI adjustment range with included gauge. Anodized corrosion-resistant finish stands up to ethanol blends and road salt. Protects your carburetor from over-pressurization and flooding.
• Street-Tuned, Not Race-Only: This bundle is built for engines that see real street duty — crisp throttle response, smooth idle, easy cold starts, and fuel efficiency that doesn't sacrifice performance.
• 1-Year Warranty & Free Technical Support: EVIL ENERGY stands behind every product. Questions about fuel line routing, pressure settings, or throttle linkage? Our technical support team is here to help.

Brand Summary

Return Reasons

1. Quality Issues: Provide photos/videos; we cover return shipping.
2. Wrong Item Ordered: Buyer covers return shipping; email within 30 days.
3. Change of Mind: Buyer covers return shipping; email within 30 days.
4. Shipping Damage: Inspect packages; do not sign for damaged items.
5. Incorrect Item Shipped: Contact within 7 days.

Price Protection Policy

Effective from August 25, 2024. Price drops within 7 days of purchase can be claimed.

Disclaimer

EVIL ENERGY reserves the right to interpret, modify, or terminate this policy in accordance with applicable laws and regulations.

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