I'm really not sure. I'm actively researching that right now. I know the F1 folks actually had to pre-heat the intake air on the turbocharged F1 engines because the high toluene content fuel they were useing would evaporate too slowly at normal intake temps.
I just found a really slick digital dual intake air temp gauge.
If any one wants more info, let me know.
I hope I can do some detailed air temp measurements at various points in the intake tract when I get it installed.
The beauty of this gauge is it lets you switch to a differential T setting so it computes the temperature drop directly for you.
Can't wait for it to arrive.
JSMC:
Actually air temps in the intake tend to drop at high rpm as the air spends less time in contact with the hot intake manifold.
Now if the system is turbocharged your correct that under high boost the temps go up, but that is very well handled by a boost pressure triggered WI system.
cheekychimp:
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any comments on my proposed setup above i.e. liquid to air running NPG+ coolant?
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My only reservation on that would be the extra complexity. I'm not sure it is necessary to get that complex.
Larry