Converting standard carburetors to "Turbo" carburetors requires the installation of special Turbo Emulsion Tubes. The flow characteristics of blown or pressurized carburetors are greatly changed from that of normally aspirated carburetors and corrections must be made to the total system. Turbo Emulsion Tubes enrichen the fuel flow during periods of high boost and yet provide a lean enough mixture to obtain reasonable economy at normal highway speeds.