Here is a simple throttle body that looks like it will pass enough
air for a rotary. The throttle position sensor is not needed with
Tracy's fuel injection system. 

Will work with a Power Sport type of plenum chamber.

The stock Mazda two or three barrel butterfly types have slightly more 
pumping losses than a large single barrel like this one.

It is from Kinsler. http://www.kinsler.com

Paul Lamar
 
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