Quote van Alta over de open filter:
Lijkt me dus mee te vallen qua vermogenverlies. Een gesloten systeem is natuurlijk altijd beter, maar ik vind het geluid echt super van een open systeem! (vooral bij een turbo). Alta is ook bezig met een gesloten systeem. Misschien iets voor in de toekomstIf you haven't seen THIS, PLEASE READ HERE. Part way down you can see the intake info.
Yes you are a little wrong (I am saying it in a nice way, so please don't take that the wrong way). We have done lots of testing with temps (notice the probe behind the filter) that the filter sees in that posistion.
First off the turbo heat shield is removed only to show the DP off. It needs to be installed on the car to keep the hot air away. With it removed during a test, the temps were about 80 degrees above ambient.
Secondly there is quite a bit of air flow throught that area of the car with the OEM scoop STILL installed. The temps we measured were not too much warmer than ambient, but they were warmer. The reason for the temps being reasonable is because there isnt much radient heat coming from the back of the motor, it all comes from the front.
Our intake was designed to remove the scoop, this is why the filter is place where it is placed. Also we use the OEM fresh air scoop to get more fresh cool air into the filter area.
So with the scoop removed, the temps were much better (and this was just using the dyno fans which don't represent the air it sees driving down the road) and needless to say they are not much. Also all of our intake tests were with the hood down to ensure as much as a real world result as possible.
The gains we saw by removing the scoop, were not huge but a few HP. Every little bit makes a difference in the end! Because we gained a good amount of HP, we were very happy.
That being said we had a few tricks up our sleeve to make it even better (not tht it would actually make a difference), and we have true cold air box planed. But there is a cost vs function issue that arrises. We didn't want to come out with a $500 intake system that would scare people away. Things like a special scoop for the under side of the hood to blow on the filter was eliminated because of how much cool air is flying around the filter.
I hope that answers your question/concern.
Hier een voorbeeld van een R56 met open filter (aan het einde is het goed te horen).
Nou staat ie er zelf nóg niet bij! 
