Quote:
Originally Posted by ecomodded
It could be that warm intake air is the key to more economical combustibility,yesterday I disconnected my intake hose that led to the front of my car from the air filter box, so the car would breath warmer under hood air. The hole on the air filter box faces the fender so it is not directly over the motor.
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A warm air intake actually reduces efficiency of a diesel and increases NOx emissions. This is one reason you will find intercoolers on turbo charged diesels today.