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The Secret Life Of Carburetors

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The hole in the throttle body wall is the idle discharge port. For a big-cam engine, the carb should have one of these in each barrel (four-corner idle).
The Secret Life Of Carburetors

 The hole in the throttle body wall is the idle discharge port. For a big-cam engine, the carb should have one of these in each barrel (four-corner idle).  View Related Article

 

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