Indy/rhs heads?

All of the "area under the curve" talk takes me back to my calculus classes (who knew they would come in handy eh?). It makes total sense if you think about it, and is analagous to horsepower curves. Just as average horsepower tells more than peak horsepower, average flow (more properly described by area under the curve) better describes overall air flow. The proper way to compare heads for flow, and engines for horsepower (as has been stated) is to look at the avrage numbers/area under the curve for the RPM range that you intend to run the engine. Very interesting discussion.