Apparently someone did a flow test with the scoop inplace once.
![](./images/smilies/spacer.gif)
It did not affect the running temps of the engine what so ever, this was down to the physics of air density and not flow direction.
![](./images/smilies/spacer.gif)
Ie, the cooler air from the scoop will be more dense than the hot air above the turbo/manifold and therefore the trend will still be for the scoop air to sink before rising upward and out the lid vents.
![](./images/smilies/spacer.gif)
Sounds positive! however the velocity
![](./images/smilies/spacer.gif)
& heavy air sinking from the scoop increased the pressure in the engine bay making the effectiveness of the lower trays
![](./images/smilies/spacer.gif)
+ side scoops Less effective
![](./images/smilies/spacer.gif)
(there is more resistance pushing against the air thats trying to flow in the vents).
![](./images/smilies/spacer.gif)
the result was no change in engien bay temps but a big change in flow direction through the bay.
![](./images/smilies/spacer.gif)
My concern would be that the increased pressure in the engine bay will effect the downforce dynamics at the rear end and increasing instability at higher speeds.
![](./images/smilies/spacer.gif)
there is also the extra Drag caused by the scoop to consider
![](./images/smilies/spacer.gif)
-any possible but unlikely gain you could get from the scoop will soon be lost as speed increases and at higher speeds it will actually hinder performance.
![](./images/smilies/spacer.gif)