By Dave Hobbs. In addition to his work with Delphi, Dave Hobbs serves as an instructor for Indiana’s Ivy Tech Community College. He is also a frequent speaker at national training seminars, is a qualified hybrid instructor and writes for various industry magazines. Two decades of training engineers and service technicians around the world has provided Hobbs the unique ability to bridge the theoretical with the practical. Today, Hobbs talks with us about turbochargers and superchargers — what they are, how they run and what technicians can expect when servicing or installing these engine performance components.