800CFM Thunder Series AVS Carburetor w/E/C

The 800CFM Thunder Series AVS Carburetor w/E/C from Edelbrock is a purpose-built performance fuel delivery system engineered for street and strip applications where reliable mid-range power and throttle response matter. This carburetor is designed for enthusiasts and professional builders who demand precise fuel metering without electronic fuel injection complexity. Whether you're tuning a classic muscle car, hot rod, or modern retro build, this carb delivers the mechanical simplicity and predictable performance that experienced mechanics trust for naturally aspirated engine builds.

At 800 cubic feet per minute (CFM) capacity, this carburetor is optimized for mid-sized displacement engines, typically in the 350–400 cubic inch range, where it provides enough fuel volume for peak power without sacrificing throttle precision or part-throttle driveability. The AVS (Air Valve Secondary) design automatically responds to engine load, opening the secondary venturi stage progressively as demand increases—eliminating the bog and hesitation common with mechanical-secondary designs. The included electric choke (E/C) ensures reliable cold-start enrichment and faster warm-up cycles, reducing cranking time and improving initial drivability.

Ideal for carbureted engine swaps, vintage restoration projects, and performance builds, this carburetor's four-barrel configuration with dual floats maintains stable fuel pressure across varying throttle inputs and G-forces during cornering or acceleration events. It is a reliable choice for those looking to enhance their vehicle's performance while enjoying the simplicity of a carbureted system.