Turbocharging has reshaped motorsport more profoundly than almost any other engineering breakthrough. From its earliest experiments in aviation to the roaring ascendance of Formula 1's 1980s horsepower monsters, from the decades-long dominance of turbocharged engines in IndyCar to the precision demands of Le Mans, rallying, and modern GT racing, forced induction has continually pushed the limits of speed, efficiency, and innovation. Turbo Wars: How Boost Pressure Transformed Racing delivers the first comprehensive, fact-driven narrative of how turbochargers entered competition, conquered it, and returned in hybrid form to define the power units of the 21st century.The book traces the full arc of turbocharging's impact across continents and eras. It documents the engineers and manufacturers who pioneered early systems, the political battles that governed their rise and fall, and the unforgettable machines that redefined what race cars could achieve. With verifiable data, regulatory history, and firsthand accounts drawn from official records, it explains how boost pressure influenced engine architecture, driver technique, race strategy, and even the identity of entire series. Whether recounting the explosive power of the 1,400-hp qualifying engines of Formula 1's peak or the relentless efficiency battles of Group C endurance racing, the narrative captures how turbocharging regularly forced the sport to rethink its limits.As motorsport enters an age of hybridization and sustainable fuels, turbocharging remains central to its evolution. This book connects past to present, showing how lessons from the turbocharged eras shaped today's engineering priorities and tomorrow's racing landscape. Rich in technical insight yet accessible in style, Turbo Wars offers a definitive chronicle of the competition, innovation, and controversy that made boost pressure one of racing's most transformative forces.