Thread: Diesel Engines
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      11-03-2005, 07:22 PM   #6
voltron1011
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Drives: 2011 135i, FJR-1300
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Diesel motors are compression motors that don't require spark plugs. Since the motor compresses the air so much (so hot) with aid of a VNT turbo, all that the hot air needs is some fuel to ignite it. Diesel motors don't have such violent explosions during combustion like traditional petrol motors, but rather a softer flame-up. This is why diesel motors can't rev super high. The glow plugs that you hear about are only needed when the motor is cold.