How many times have you wished your engine rumbled and hummed a little more? Without a basic understanding of fuel injection and engine management, you may be stuck with what the factory installed, but the ability to add more horsepower to your stock V-8 may be easier than you think. Luckily, you've got the revised edition to Motorbooks' bestselling "How to Tune and Modify Automotive Engine Management Systems, "by Jeff Hartman. Within these pages, you'll learn the ins and outs of turbocharging, supercharging, nitrous, and all the technical tools and techniques to make your engine purr. With over twenty years of engine management experience, Hartman explains everything from the basics of fuel injection to custom-building complex digital systems for your twenty-first-century vehicle. You'll find detailed explanations, photos, and graphs on everything from sensors and actuators to the right computer systems for your vehicle (and your style). Will you use your vehicle's factory system or add an auxiliary computer? Let Hartman, an engine management expert, help you make the right decision. With over 300 photographs and a series of how-to project chapters, "How to Tune and Modify Automotive Engine Management Systems "gives you everything you need to turn your ride from mild to wild.