Calibration Kit for 1405

The Edelbrock Calibration Kit for 1405 (MPN 1479) is an essential tuning component for owners and technicians working with Edelbrock Performer Series carburetors. This kit exists to restore precise fuel metering and air-fuel ratio control when factory calibration drifts or when you're transitioning your Performer carburetor to different engine specifications, fuel types, or altitude conditions. Whether you're rebuilding a classic muscle car, maintaining a street rod, or dialing in a recently swapped carb on your daily driver, this calibration kit gives you the adjustment range needed to achieve optimal performance and efficiency.

The kit includes metering rods, metering jets, springs, and a protective case—the core components that govern how much fuel flows into the combustion chamber relative to engine load and speed. Metering rods taper upward into the main jets, effectively changing jet orifice diameter as throttle position changes; swapping rod taper profiles or jet sizes directly controls fuel delivery across the RPM range. Springs ensure smooth actuation and return under load. By offering multiple rod and jet combinations in one package, this calibration kit allows you to fine-tune your carb's fuel curve without purchasing individual components, saving both money and trial-and-error downtime on the dyno or road.

Mechanics and enthusiasts with naturally aspirated or mildly boosted Performer-equipped engines benefit most from this kit when chasing repeatable, clean idle quality and mid-range response. It's invaluable when engine modifications—intake changes, cylinder head work, or ignition upgrades—alter volumetric efficiency and fuel requirements. The compact case design (4.95 x 1.4 x 9.15 inches, weighing just 0.42 lbs) keeps all components organized and portable for shop or trackside use. Installation requires only basic carb knowledge and hand tools; no special equipment needed, making this an accessible upgrade for both professional rebuilds and weekend warrior tuning sessions.