"yar. do you have a picture you could share showing the addition of the flap/s?"
I actually just took a couple for someone else who asked. They are pulled tight against the cookie sheet fan shroud by the fan when the roadster is standing still and they definitely improved highway cooling.
"Yep, a transverse mounted radiator along with transverse mounted engine fan wouldn't work very well. Couldn't take advantage of "road air" unless you were drifting in the right direction."
Hey Kevin, you might be joking but the hoodlums over in nearby Oakland have outlaw car events called "Sideshows" where if your car isn't going sideways you get NO respect. To each his own, huh?
"Originally Posted by yar ...It has 2 electric fans mounted on a shroud and if mechanical fans were superior that's what would have been used....
It could also be that the bean counters over-ruled the engineers. But, hey, that's never happened before. Adequate versus best weighs in to that decision."
It seem like the bean counters would like the mechanical fan because a simple stamped sheet metal fan would cost way less than 2 electric fans and all the stuff to control them. But what do we know? We're just grease under the nails gear heads.