[Christ]

Hm... seems like the opposite should have taken place... do you have a way to measure pressure drop across your filter media? (vacuum gauges would work fine... )

EDIT: Oops, a vacuum gauge on the dirty side will do nothing unless there is significant restriction there. Chances are, there isn't, since you're playing with RAM air.

Still, one on the clean side will help determine whether the RAM effect is actually doing anything, or if there isn't sufficient pressure to change the intake flow at all.