I really know nothing about how all this works. My use of the word swirl was really only in the normal layman sense not in the specific sense of Combutstion. Having said that, Warwick had a very similar shaped CC of which I have a photo if you need to see it, only his CC didn't have the metal in the center slowly tapering up at the edges, his was pretty much full height all the way, he claims to have gotten 130hp at the wheels with that mod and quite a few more, but that wasn't as stuffed with as peter's.