Tag: Lean mixture

According to automotive experts, a properly tuned carburetor can significantly improve an engine's performance and fuel economy. Knowing how to make a carb leaner is a crucial skill for enthusiasts looking to optimize their vehicle's efficiency, but it must be done with caution to avoid engine damage.

For pure octane gasoline, the stoichiometric, or ideal, air-fuel ratio (AFR) is exactly 15.1:1. This means that a 15.1 AFR is not strictly rich or lean, but represents a state of perfect chemical balance for a specific fuel type. However, when applied to standard pump gasoline with additives like ethanol, this ratio behaves differently.