Holley 0-80577S - Supercharger Carburetor

Holley - 0-80577S

Supercharger Carburetor; 4 bbl; 950 cfm; 2 Circuit Metering; Model 4150HP; Mech Secondary; No Choke; Gas; Dual Fuel Inlet; Double Accelerator Pump; Gold Dichromate Finish;

These carburetors that are intended for use with superchargers, and have a unique capability that allows their power Valves to reference the intake Manifold vacuum below the supercharger. This allows the power valve to operate as it should, based off intake manifold vacuum. A power valve provides further enrichment to the main metering system under load (low vacuum) conditions. Without this external referencing, the power valve would be reading the Supercharger boost pressure, which has no bearing on the engine load.

• Tumble Polished Shiny Finish For Good Looks
• Contoured Venturi Inlet Balances Airflow For Increased hp
• Screw In Air Bleeds For Precision Tuning Capabilities
• Dual 30cc Accelerator Pumps
• Dual Feed Fuel Inlets For Constant High Volume Fuel Delivery
• Mechanical Secondaries For Perfect Off The Line Launches
• 4 Corner Idle Allows You To Precisely Control Your Idle System
• Boost Referenced Power Valve For Enrichment Under Acceleration
• Throttle Lever Cut Off For Clearance On A Sideways Application
• 100% Wet Flow Tested By Holley Technicians
• Arrives Ready To Run