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Old 11-09-2008, 02:00 PM   #23 (permalink)
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Originally Posted by Duffman View Post
I think more so than in a gas engine there is an optimum intake air temperature in a diesel. Cold air is more dense and therefore has more O2 which is definately good for FE but a diesel also requires heat to run so a charge that is to cold may not run well either.
Diesel's do not need heat to run - they need compression. The compression provides the heat. In every circumstance in diesel engines, the colder the intake air the better the efficiency.

Well, re-considering - if it is very cold the diesel needs some additional heat from the glow plugs for a few seconds, but that's a special case. It never needs warm air.

Last edited by instarx; 11-09-2008 at 02:31 PM..
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