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Old 02-04-2008, 05:19 PM
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Originally Posted by Diesel911 View Post
Better combustion = higher exhaust gas temps.
That is wrong as well. Better combustion burns cooler.

Which will produce the lowest exhaust gas temperature after combustion is over with? The hot less dense are from the engine compartment going into the intake system or cold denser air?
The cold air.

Myself, I don't know and I do not think that for practical purposes of every day driving it matters.
It does matter because hotter combustion results in more wasted heat going into the exhaust and cooling system rather than being converted into mechanical energy.