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In short, there are two reasons: Cooler air is more dense, so you get more power from the same boost pressure because you can inject more fuel at the same time. Hotter air will make the air/fuel mixture detonate prematurely (the mix needs to burn at a constant rate, at the exact right moment. It shouldn't "explode"). In the second instance this will mean ...


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There are a few important factors at play here. Hot air rises, cold air sinks In physics-speak, hot air is less dense than cold air. This means that the volume occupied by 1 kg of hot air is greater than the volume occupied by 1 kg of cold air. The internal combustion engine is a volumetric device What this implies is that every time the engine turns ...



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