Bob Donalds made a reference in his post on vanagon air scoops that
mentioned  the fact that cooler air made for more power and efficiency.
Thust it is desiable to get cooler air down the intake pipes.

As I understand it, the nitrogen injection that is done on hopped up
engines drops the temperature of the fuel/air mixture so severely that
the charge actually shrinks significantly therefore you can actually get
MORE fuel air into the combustion chamber before ignition, thereby
increasing power significantly.

Anyone know more about this?

John Rodgers
'88 GL Driver wannabeverysoon