Quote:
Originally Posted by serialk11r
At 18:1, you're losing around 20% of laminar flame velocity which sounds like a lot but it's not that many crank degrees. . . . . A lean mixture has higher thermal mass, but also a higher reaction rate due to more O2, and the two factors should cancel each other out in theory.
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I agree that flame velocity is slower with increasingly lean mixtures but you then say it has higher thermal mass? And higher reaction rate? Remember, you have less fuel to provide the heat.