Carb Tuning
Metering rods are also marked with a part number than indicates the diameter of each section of the rod. This 7547 rod has a cruise step with a 0.075-inch diameter and a power step with a 0.047-inch diameter. Edelbrock sells calibration kits for each carb model that contain an assortment of jets, rods, and step-up springs for tuning. View Related Article
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