Raceheads Engines, out of Ontario built it. They are always in the Amsoil Engine Challenge. They specifically state it's there to control windage from the cam lobes. The article is in the fall issue of Engine Masters Magazine.
These guys apparently know their stuff. They saw the point in it. So do I. If you've ever primed a roller cammed LA with the intake off you'd know what I mean.
I don't see the point in a lot of things people do, but I try to understand.
