The Globe and Mail Lou Trottier Published February 20, 2021 Bookmark
Many vehicles on the road today come equipped with a turbocharger or supercharger on their engines. Given the number of queries in my inbox asking about them, it’s safe to say that an explanation of their purpose and the differences between the two might serve you well during your next conversation with your mechanic.
Firstly, it’s helpful to know that within an internal-combustion engine, the ideal air-to-fuel ratio is 14.7:1. Simply put: For every single part of fuel, there should also be 14.7 parts of air. This stoichiometric ratio creates the ideal circumstances for efficient combustion. The ratio must always be maintained, which means as you add more fuel, the corresponding amount of air must be added. While the former is easy, the latter is tricky. The go-to method in the muscle-car generation was to use fuel-thirsty, larger-displacement engines. A larger engine equals a larger amount of air. By
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