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Old 07-17-2012, 12:31 PM   #6 (permalink)
NachtRitter
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Quote:
Originally Posted by Diesel_Dave View Post
No, a cold air intake (CAI) is better than a warm air intake (WAI) on a diesel. A WAI improves fuel economy on a gas engine for 3 reasons:

1) The warm air is more dense, so the throttle opens up more to get the same air, therefore throttling losses are reduced.
2) The warm air improves the flame speed
3) The warm air improves the vaporization of the fuel
I know what you meant by #1, but it might be worth a quick edit since the rest is well written and good advice
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