What can excessive vapor pressure in aviation gasoline lead to?

Excessive vapor pressure in aviation gasoline can indeed lead to fuel lines being susceptible to vapor lock. Vapor lock occurs when the fuel in the lines vaporizes due to heat and low pressure, causing a restriction of fuel flow to the engine. This situation can lead to engine performance issues, as the fuel delivery is compromised. In aviation fuel systems, proper vapor pressure is crucial to ensure that fuel remains in a liquid state as it flows through the lines. When the vapor pressure is too high, temperatures can cause the fuel to vaporize prematurely. This is especially critical in high-performance aircraft where consistent fuel delivery is essential for safe engine operation.