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Old 09-28-2013, 06:09 PM   #23 (permalink)
Master EcoModder
Join Date: Feb 2012
Location: Australia
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Diesel's like air, the more the better and cold air is denser so more air per unit of volume.
The other points are that cooling the air in intercooler causes a small pressure drop, so less backpressure for the turbo compressor, this means less exhaust back pressure on the turbo side and higher efficiency.
What you might want to consider is a RAM air cold intake.

The other point anyone running a diesel should have both boost and EGT gauges and understand what they mean, they should guide your driving behaviour.
High EGT's is what kills diesel engines, the hotter the air intake the higher the EGT's, running the engine hotter may yield a small benefit in FE, but it's false economy when engine longevity is compromised.
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