3.8 mph gain from no hood? Pics inside and input needed

Maybe, just maybe, the scoop does provide a ram effect( you are over 150, after all !) that the filter and elements cancel out. The filters cost next to nothing on the dyno, yet you picked up(apparently) a bunch of power without them at the track. It has to have something to do with 150 mph airflow that is different from dyno airflow.