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On fuel to air ratios and temperatures-
I've known for a long time that an engine running lean runs hotter, but I wasn't ever very satisfied with the fuel cooling type answers. Today I found an answer that makes more sense to me.
Lean ratios burn slower, and expose the engine to combustion temperatures for longer durations.
While I prefer this explanation, I'm still looking for more supporting info. Using this idea, I would think that leaning out mixtures wouldn't have a direct corellation to fuel savings in part to more energy being wasted as heat.
Does anyone know how the ignition timing differs in cars w/ lean burn at a given rpm and map?
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