Paul or anyone.
 Looking at the  Kinsler racing goods catalog I
noticed that their
butterfly throttle fully closes  14 degrees
before  perpendicular.  Is
this design point to keep it from jamming when shut? Obviously the
throttle plate then will not be perfectly round but an
ellipse.
Also does a throttle have to completely close?  Cold
starts may be one
reason perhaps but that is not such an issue with
programmable
injectors.  I am concerned because the high vacuum
forces on the throttle
plate may bend it unless I chose stainless.

Doug in Japan.

Yes that is what it sounds like to me.
Usually throttles don't close completely as the engine
needs
air for idling. The carb idle adjust screw changes the
throttle
opening during idle. Not to be confused with the carb idle
jet screw.

Kinsler has some neat stuff so everybody should download
their catalog.
http://www.kinsler.com/page--HandbookCatalog--2.html
Particularly useful are their bell mouths for intake
runners.

Paul Lamar

Thanks for that link, they are right around the corner from me, what a resource.
C. Smith