Miata Mailing List: September 1993, Message #84
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   From: MANSON@fsd.com
Subject: Windshield Air Pressure
   Date: Mon, 13 Sep 1993 07:38:46 -0400

I think that I mentioned previously that back in the 70s, GM introduced
an air intake system designed to take asvantage of the increased pressure
at the base of the windshield.  GM called it "Cowl Induction."

I would assume that the difference between the windshield angles between
the Miata and those GM products might be slightly different, but would
also expect that there is still a pressure increase (above ambient) at
that location on the Miata.  I know better than to make assumptions
however and I would want to have some better data on this pressure before
cutting sheet metal so near being exposed.  Maybe I'll do some tuft tests.
If I do I'll publish my results here.

Tom Manson
Manson@fsd.com