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

Thanks for responses, gentlemen! Every one has given me something to try.
Scoop only.
Nascar filters only, no hood or scoop.(they basically filter out larger particals of sand, rocks, foriegn objects)
Filter lid, tape off bottom filter, open nascar top filter, scoop, no hood.
There are more combos, plus scoop options. Lots to look into.
Would like more input/ experiances, keep this thread going as an engineering exercise!