Quote:
Originally Posted by SaXo_vtr123
Any proof that it doesnt? 
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Go for a drive and lift your bonnet, is it cool even after high speed.
NO its not, there isnt a huge amount of airflow going through the engine bay, if it was then drag would be massively increased etc.. which is why the grills are small and positioned where they are for radiator cooling etc...
Notice in slow moving traffic and hot weather how quickly the cooling fan kicks in? this is a reflection of the rad/coolant temp increasing, along with this so will the under bonnet temperature.
Open filters and the heat soak debate will allways go on, some feel they work some dont. There isnt a huge amount of airflow going through an airfeed though if the engine bay is very hot.