Jetting Correction Calculator

Liguori Drag Racing • Weather

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Jetting Correction

Compare measured jet orifice diameters as air density changes.

Starting values are examples. Enter your measurements; results update as you type.

Method & assumptions

A diameter comparison, not a universal jet-number calculator. Dry-air density ratio scales fuel area directly for fixed differential pressure, or by its square root for the ideal carburetor model. Fuel, fuel pressure, discharge coefficient, and hardware must remain unchanged. Use your jet manufacturer’s flow data and verify mixture.