I am no technical expert on all of this RAM AIR stuff, but I have a buddy who races Miatas and has experimented extensively with various CAI systems. He told me that just running a Dyno does not begin to show the performance gain. The faster you drive (to a point I am sure) the more air will be pulled in. The "cleaner" the design without extra turbulence will be something you feel that cannot be measured on a Dyno. At least that is what he told me.