<div class="htmlview paragraph">General Motors has developed a supercharged version of its 3800 V-6 engine. It utilizes a Roots type supercharger mounted in the Vee of the engine, attached directly to the intake manifold.</div> <div class="htmlview paragraph">This engine provides increased performance with an excellent balance of fuel economy, as well as a high level of pleasability and reliability. The objective was to achieve the character of a larger, eight cylinder, engine while maintaining the fuel efficiency of a six cylinder. This would provide an engine well suited to market and environmental needs.</div> <div class="htmlview paragraph">Various methods of boosting, structural development of the engine, and control systems considerations, were evaluated. Final designs were selected based on total system quality, reliability and simplicity.</div> <div class="htmlview paragraph">This paper outlines the evaluation, selection and development of this new powertrain and technology.</div>