Originally Posted by Markb_s1
i'd have thought you'd be better off bringing the air up through the boot floor, through the rad and then out the rear panel... perhaps that way it could also be used to create some kind of venturi effect?
The area behind the boot is normally low pressure - hence the dirt being sucked from the exh onto the back of the car...
Getting air to move into this area should be possible - but you might struglle getting it away.
I know a guy who runs a rear rad mounted on his boot (its a mini of course) and it just about works, but isnt great.
Alex