Another thing to think about... when you are traveling
down the road in a rain... which way do the rain drops
go... if up then its not gonna put air into the back
of the cowl... the cowl itself is blocking the upward
flow if its close enough to give the low pressure
area needed at the back of it... so between the low
pressure created from the intake/pistons and the
cowl close enough it should get good flow.... I was
gonna do a test on my car(P-Body) and a guy that was
running a cowl.. we both had similar speeds but he
blew up the engine and I never got the chance