[apk919]

Originally Posted by Pestodude

Then, to my mind, if the roof is only allowing x amount of air to pass into the clam and there's no way to open up the roof any wider, it might flow more air WITHOUT the roof or with a roof sans a scoop. Then (correct me if I'm wrong) you could fettle the clam opening even larger because you wouldn't have to worry about a mating surface (to seal against a roof).

I'm planning on getting flow data with the roof off... but if I were to guess, I'd say it would flow a little less than when the Cup roof is on. The inlet of the roof presents a larger cross section to the air flow than the clam opening does, and a small "ram air" effect probably increases the flow (with an obvious cost in aero drag).

If you look at the photos though (http://www.lotustalk.com/forums/atta...-duct_seal.jpg), the ductwork leading to the intercooler is already smaller in cross section than the opening in the clam... I think you'd have to change the ductwork too.