Archive for September 2019

Octane Ratio This is an anti-knock scale developed in the 1920’s to rate the quality of gasoline’s ability to resist knocking or pinging. The higher the octane numbers the more protection against harmful knocking and pinging. There are two methods for testing octane, research and motor. Research octane uses a small, low RPM, one cylinder…

ALTITUDE As you increase your altitude the octane requirement decreases 1-2 octane per 3000 feet elevation. This is because the density of the air is reduced so there is less air available for your motor to burn. The fuel volume remains the same and the air volume goes down. As the altitude increases, the motor…