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...Murphy carefully measured the mixer's idle discharge ports; they came in at 0.066 inch. Murphy enlarged both ports to 0.086. Why? The pressure drop as air moves past them will be less with a hotter cam, so the larger holes will be better able to pick up the appropriate vacuum signal.
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...Murphy carefully measured the mixer's idle discharge ports; they came in at 0.066 inch. Murphy enlarged both ports to 0.086. Why? The pressure drop as air moves past them will be less with a hotter cam, so the larger holes will be better able to pick up the appropriate vacuum signal.  View Related Article

 

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