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Originally Posted by Humbucker
I just figured morre airflow would require more fuel, thus more jet. What am I missing? Thanks for taking the time with this, too. Much appreciated!
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You are correct- more airflow does require more fuel and that is exactly what a carb does. The more air that goes through the carb the more fuel that air draws with it. Once the ratio (jetting) is correct the carb will pull the correct amount of fuel based on airflow.
For what it is worth, I switch carbs between 600 hp and a 800 hp engines and I don't have to change anything.