Fred Osborn wrote:

Paul,

Regarding Jerry's throttle bodies in the attached photo. They are
installed with a vertical rotation axis. It seems to me that the intake
air flow direction at idle would be strongly influenced by the position
of the throttle plate. If the axis was horizontal the flow could be
directed up or down into the opening combustion chamber to effect the
flow of the exhaust gas during the overlap time. Do we know what
direction the axis and the rotation has been in p-ports that have had a
better idle?

Fred Osborn

Its too late now but yes you are right. To answer your question I don't think
anybody investigate that.

Paul Lamar

 
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