Matthew:
See attached photo. I had a row of louvers near the outer edges about 2 ft.
ahead of the windscreen. Likely not a pressure area, although I never did
an airflow test. I also never had a problem with overheating. And, when
racing, you want to keep the intake air as cool as possible. So, these
louvers likely did their job along with large openings in the carb side of
the radiator support panel (left or right depending on which head I ran,
either crossflow or 5-port). Only drawback was the need to tape the
underside of the louvers over the distributor when driven on the street to
keep it dry in rain or snow.
Norm Sippel
[demime 1.01d removed an attachment of type image/jpeg which had a name of
P1010162.JPG]
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