Quote:
Originally Posted by gtengr
The cowl piece is shielded from airflow, so I think that's debatable. I think it's likely a low pressure area exists in the airflow void where the vents would be. Also need to consider there is an underhood pressure component, and the underhood air is hotter. Seems you should know that once you cut a vent into something that the pressure zones can easily change and need to be reanalyzed.
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This was proven years ago on here, probably find the threads if you have a look about.