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That's the place I had bookmarked. I just bookmarked it again.
Actually, cowl type hoods act like heat extractors. Even though the base of the window is a high pressure area, I guarantee the hot air coming out of the radiator, being pushed by forward movement, is higher pressure than the base of the window. I've tested it using the streamer method. Only time I've had a cowl hood that actually worked like they're supposed to was on a Firebird years ago. Had a Z28 scoop on the hood. When first installed, the streamers always flowed up the windshield. After fashioning a pan out of sheet metal that sat on top of the carburetor, with a velocity stack on top of that, and one inch thick foam around the edges of the pan. then it worked as an intake. Worked so well, I had to reinforce the scoop, as it kept puffing up at high speeds. Almost tore it off the hood.
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