Holley Performance 0-80573S Carburetor
by Holley
Sale
$1,765.10
$1,372.85
50 Cubic Centimeter Secondary Pump With Manual Choke Mechanical Secondary Limited 90 Day Warranty
Specifications
Condition - New
Number Of Barrels - 4
CFM - 750
Recommended Use - Street/ Strip
Flange Style - Square Bore
Choke Type - Manual
Emissions - 49 State Legal
Finish - Zinc Chromate
Fuel - Gasoline
Fuel Inlet - Dual
Calibration - Chevy Small Block 1 X 4
170 Series Blower
Secondary Type - Mechanical
EGR - Without EGR
Includes Gaskets - No
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 and 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
