Quote Originally Posted by jR1_kS14 View Post
how does it make it work harder though?

cooling an engine is in the form of oil and water. which flows through the radiator, to keep it at a lower temperature.

is the argument of this thread that there needs to be a vacuum kept inside the engine bay? as long as air is passing through the radiator, the engine will cool fine. i'm not seeing how it's working any harder when the rate of air passing through the radiator (assuming that there is no blockages) is consistent while driving highway speeds.

if i drive a SR'd S13 with a FMIC, and no front bumper, i'm not seeing how it will "hurt" my performance. (engine wise) (of course it's not aerodynamically efficient)

this is speaking for regular/ average joe modded cars.
I've given an explanation that would answer your question already.