Quote:
Originally Posted by JockoT
I realise you can change the air intake temperature, I have had cars where the air cleaner has a summer and winter position. But how and why would I adjust it on the move?
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The why: if intake air is not very high, the theory goes, the beneifit to fuel economy from decreased pumping losses cannot occur. If it is too high, some fear engine damage. I typically went for 30-50*F over ambient.
The how: some guys have a shutter system on the grill, or a redirect system on the intake tube. Both are to allow selecting for hotter or cooler intake air (often using a solenoid or some sort of wire-pull switching mechanism).
I have gained a little more skepticism about my warm air intake in the last year, since I was forced to run without it for a while and was unclear what affect its removal had on my FE (possibly it got better, but there are too many variables to feel confident of that educated guess). So, I too would love to see the thesis on warm air and fuel efficiency that you mentioned. Can you find it?
james