"Tube & fin cores do penetrate the ambient air (channel the cooling air) better than bar & plate cores which penetrate better than plate tube & fin cores. Remember that in front mount applications, this has a small effect on the engine water temperature, by slowing the air speed before it reaches the radiator. This is because the rounded leading edge of the tube & fin tube parts the air with less turbulence than the square leading edge of the bar & plate tube, which parts the air with less turbulence than the "W" shape of the tube & fin tube"

I do have a tube and fin design right now (modified starion), but it doesnt flow enough for my turbo.