[vector1]

the cold air part helps, i have used an air filter that was sealed to the hood and on a moderate approx 70 deg. day the carb will be absolutely chilled form the air moving through it.

the smaller scoops used on the cobras i don't believe provide much benefit of the ram air effect, if at any speed. my thoughts are the intake must be positioned away from the boundary layer into undisturbed air, but again, i could be wrong.