Just inherited a 1969 Porsche 912 from my father. I have a general understanding of fuel injection from my days drag racing my nitrous assisted ’86 300ZX but I have no clue how a carburated car works and online articles are beyond me. Need the 5yo explanation because right now, it’s basically dark magic.
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A carburetor does mechanically what fuel injectors do electronically. Instead of relying on airflow and O2 sensors to determine the right amount of fuel to deliver to the engine, a carburetor relies on principles of fluid mechanics to do the same. Air flowing through the venturi, an air passage with a section that narrows, experiences a pressure drop which pulls fuel through ports (called jets) and causes the fuel to atomize. Jets are sized based on desired performance characteristics. Carburetors are less efficient than fuel injectors, mainly because you can only tune them for a specific set of conditions instead of having a computer continuously adjusting fuel flow based on sensor data.
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