Herb Sanders wrote:

same place as the factory cowling scoop (for downdraft cooling on a
Lycoming), but located to best direct the air both into the intake as

well

as hit the fuel rails and exhaust manifold. It looks rather ugly in

these

pics, but the finished product is faired in and looks better.
       Haven't flown it yet, (rain today) but I can't imagine not

realizing

an improvement in climb/cruise speeds. Also attached is a picture of the
factory downdraft scoop.  Paul Conner

 Paul (Conner), If I am understanding correctly, you are going to blow ram
air into the cowl in the general area of the throttle body, and not
specifically ducted into the throttle body for combustion air.

That may increase the in cowl pressure, and reduce the differential pressure
from ram pressure in the NACA inlet (front side of the rad) and the exit air
side of the radiator into the cowl. This will reduce your cooling capacity
for water and oil. You may have excess cooling and be able to live with it,
but be careful in early testing.
Herb Sanders

 
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