There is a significant pressure wave at the hood/windshield area and the rear facing `scoop' was actually blowing cold air down on top of the engine/SC and forcing the heat and dust out the open bottom.

With the forward facing scoop inside, I would think that the reduced pressure under the hood is going to result in more dust and debris on top of the engine. the air you are syphioning out the top may cause other components to run hotter because of the reduced flow under the VX.

Just a thought.

FF