[lunarhighway]

i think i've seen something similar posted in a different discusion on the subject.

the problem is that you'd need to know the water temp and not the airtemp in the engine bay, also in the real world it's unlikely these vents will easily fit nicely in the average car... trucks and vans might be better candidates. one could look at these things , for inspiration but i think i custom vent wil usually perform better on a car