Quote:
Originally Posted by Ronin13
As Pencil stated earlier in the thread, he observed a vacuum at the top vent under full engine load. So, it appears to serve a purpose to support top end CFM requirements.
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That's for a stationary vehicle (with some artifical airflow directed at the front it sounds like). We don't really know what happens in a real situation at high speeds when the front facing intake really begins to influence the dynamics.