Don't get me wrong - I would love a ram air setup, but I'm not willing to part with the side windows. While I appreciate the ducting that can be done while removing the windows, it is just not worth the trade-off in looks. Maybe if I was racing it, but for a street application I personally don't care for the "ears" whether low or tall profile.
My real issue was just the heat build up in the engine area as well as not necessarily having even marginally cool air flowing into and around the engine - never mind a ram-air or cool-air setup into the carb. My question was really more centered around if you could duct some air into the engine bay or exhaust it out through the a/c vent area to get additional air flow in the engine bay - just trying to take a realistic first step to get any air into / out of this area.
I did run across the POCA articles last night while doing a bit of research and I have to say Kudos to the gentlemen going the extra mile trying to figure out airflow into and out of this area. While my scientific friends would probably not be 100% sold, I'm a realist and can operate on good assumptions verse 100% verifiable facts. The You-Tube videos are great and exactly what I'm looking for.
I too have the same question - which is more efficient? To pull the air in via the A/C vent or to exhaust it this way. I am curious if you exhausted air this way, is going to come in from the engine screen or via under the car or probably both. Someone mentioned a belly pan and while I doubt you would want to block all this air, if you decreased the opening some and exhausted out the back with a shroud, you might be able to pull in more air from the engine screen area. You probably wouldn't get enough air to make much of a difference in the air coming into the carb, but you could get a flow of air though the engine bay which seems to be lacking today. It would be interesting to hook up a smoke / fog machine in the engine bay to see where it vents even under moderate speeds.