Gasoline is volatile when vaporized with oxygen. As a motor fuel, gasoline burns best at a ratio of 14.7:1-roughly 14.7 pounds of air to each pound of gasoline. This optimal burn, known as ...

The choke valve in an engine's carburetor, whether it's a Holley carburetor or another brand, helps a cold engine start by restricting some of the airflow into it. When the engine is cold, the choke ...