Reply to "Ram Air Box"

Yes, you need bat ears to really work. With ducting to that location, anything else risks starving the engine at speed since unless you stick out into the air stream you could find youself in a negative air flow situation under load.
That "can't be good".
DT a few people have built scoops over the gills but I haven't heard of any that were for performance, just looks.
The bat ears were developed by the "factory".
Anything that looks that silly has to work. Like the ad says about Smuckers, with a name like that, it has to be good.