I dont think computer fans would be much of anything, kind of like you flapping your hands to create wind to keep your bedroom cool... when there's already a much bigger fan running. The engine bay is too big for them to make any difference, they'd just be swirling around the hot air that the rad fans are already blowing, or the air that's rushing in at highway speeds.
Modding the hood is probably the best way to go, scoops on the leading edge for fresh air to come in, and some openings on the end closer to the windshield for hot air on the top of the engine bay to be pushed out.
OR just take the hood off all together!
‪GTP Supercharger Whine‬‏ - YouTube
