Holley 600 Cfm Supercharger Double Pumper Carburetor - Draw Thru Design

Holley Double Pumper® carburetors stand as an ideal upgrade for high-performance street cars and racing vehicles, embodying the American legacy of top-notch carburetors. Having originated as the premier carburetor on numerous factory muscle cars and propelled countless vehicles across the quarter-mile finish line, the Double Pumper remains a stellar choice for enthusiasts pushing the limits of both street and track.

Specifically designed for lightweight vehicles equipped with a manual transmission or an automatic transmission featuring high stall and low rear end gears, the Supercharger Double Pumper boasts a visually appealing tumble-polished shiny finish. It incorporates dual accelerator pumps for extra fuel during initial acceleration, mechanical secondaries for exceptional performance, dual-feed fuel inlets ensuring constant high-volume fuel delivery, and a manual choke for straightforward control of engine warm-up.

These carburetors are intended for use with superchargers and boast a unique capability allowing their power valves to reference the intake manifold vacuum below the supercharger. This external referencing ensures the power valve operates as intended, based on intake manifold vacuum. The power valve enriches the main metering system under load (low vacuum) conditions, preventing misreading of supercharger vacuum, which is irrelevant to engine load.

Features:

• Tumble-polished shiny finish for aesthetic appeal
• Chevrolet small block 2 x 4, 671 blower calibration
• Manual (Cable-driven, hand-operated) choke for precise cold start control
• Dual 50cc accelerator pumps for additional fuel during initial acceleration
• Dual-feed fuel inlets for constant high-volume fuel delivery
• Mechanical secondaries for optimal off-the-line launches
• 2-corner idle for precise idle system control
• Intended for lightweight vehicles with manual transmissions or automatics featuring high stall & low gearing
• Boost-referenced power valve for proper enrichment during acceleration
• Throttle lever cut-off for clearance in sideways applications
• 100% wet-flow tested by Holley technicians to ensure it arrives ready to run!