Yes... Techincally the air will be colder. Q=mCpdT. Same heat load, more mass/flowrate, same Cp therefore increase in temperature will be less.
Even if the increase in temperature is slightly less - a bucket behind a radiator, behind a slam panel, behind a bumper at 60mph will never produce a big enough increase in air mass to compensate for the temperature of the air decreasing the density
"Ram air" induction kits are utter utter b****cks. You'd have to do 150mph+ to see any sort of forced air effect and the ones that point straight to a red hot area are retarded
If they are so good then how come not a single competitive car runs them?
Copying a £150 chav induction kit that doesn't work with a £16.50 bucket and filter just shows that he's not quite as gullible as the idiots who pay £150 for a "ram air kit" - but then harping on for 13 pages about the power increases that you get from them kinda undoes that