TURBOCHARGER HAVING IMPROVED PORTED SHROUD COMPRESSOR HOUSING

A turbocharger includes ported shroud compressor housing disposed about compressor wheel having air inlet passage extending axially along and circumferentially about a longitudinal axis, volute base portion operably adjacent to compressor wheel, contour that encircles and complementarily matches compressor wheel, inducer including ring and plurality of extending members, inlet section extending from volute base portion, and recirculation cavity formed in volute base portion and inlet section with recirculation slot and inlet slot for reentry of airflow into inlet section. The ring has inner wall surface defining first section extending axially along longitudinal axis proximate to compressor wheel, second section extending from first section radially away from longitudinal axis, and third section extending from second section radially away from and along longitudinal axis and distal to compressor wheel. The inlet section has first diameter and third section has second diameter being either one of equal to or less than first diameter.