A little background Ed to save time. The left opening feeds the oil

cooler

mounted horizontally on the firewall through a sheet metal duct.
You can see it in this  picture just above the rad.

Paul Lamar

Ed Anderson wrote:

Oops!  Sorry 'bout that.  Yes, not good to close off that opening {:>)

Ed

Mike Wills wrote:

  The right inlet still puts ram air into the cowl. I think Chuck told me
that he experimented with closing that off and the only effect he saw was
that his ignition coils ran hotter than he was comfortable with. In spite
of this I still think I'd be tempted to close it off and find a different
way to cool the coils (like a small Naca scoop in the side of the cowl
right in front of the coils).

Mike Wills

 
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