[SSLance]

That's an interesting thought that I hadn't considered, but after seeing how much just the housing affected the airflow, I'm curious now. If I ever get the car on a chassis dyno again, I'll be sure to make at least one pull with the hood down as well. I've never done that in the past but it makes sense to me now why one should.

The seal on the top of the filter housing fits up snug to the bottom side of the hood then there is a 2" cowl space above that open to the back of the hood. The the back of the cowl space is covered by metal with holes punched in it. A friend of mine has done the calculations and at WOT there isn't enough hole space in the panel to let enough air through to the engine. That is why my housing still has the snout open to the air under the hood just in case the engine needs more air than the cowl panel will let though. One cure is to open up all of those holes a bit larger, but then I'd have to repaint the hood. It's always something trying to get every last little bit out of your ride isn't it?