Actually, unchannelled airflow into the engine bay via a scoop could make the engine run hotter, as it will decrease the pressure differential across the radiator, resulting in less airflow/cooling of the engine coolant.

You need a sealed duct system from the hood opening to the airbox.

Function before fashion. '96 Contour SE "Toss the Contour into a corner, and it's as easy to catch as a softball thrown by a preschooler." -Edmunds, 1998