Manual boost control valve for a turbocharger

A manual boost control valve for an automobile turbocharger of the type having a turbine that is spun by the airflow in the exhaust of the automobile, a compressor connected to the turbine to rotate therewith and thereby pressurize the airflow into the cylinders of the automobile, a wastegate located in the exhaust of the automobile for bypassing a portion of the airflow in the exhaust around the turbine, and a wastegate actuator, the manual boost control valve comprising:

• an intake line having an inlet and an outlet and communicating at said inlet with the airflow pressurized by the compressor;
• a restriction coupling having an inlet and an outlet and communicating at said inlet with said outlet of said intake line for receiving airflow pressurized through said intake line;
• an actuator line having an inlet communicating with said outlet of said restriction coupling, for receiving airflow pressurized through said restriction coupling, and an outlet communicating with the wastegate actuator, wherein said restriction coupling includes:
• a biased stopper blocking the connection between said outlet of said intake line and said inlet of said restriction coupling such that the airflow pressurized through said intake line must be sufficient to move said biased stopper;
• and
• means for manually adjusting the degree of bias placed upon said biased stopper, wherein said means for adjusting is manipulated from within the cockpit of the automobile.