On turbocharged vehicles, boost pressure is horsepower. Given the constraints of the fuel system, engine integrity, exhaust flow capacity, intercooler efficiency, etc., the theory of “more boost” means more power is correct. To better understand boost control, a simplified concept of wastegate operation is needed. To build pressure, the wastegate diaphragm/valve remains closed in order to direct all exhaust energy to the turbine. To maintain a given pressure, the wastegate reroutes exhaust energy around the turbine wheel by opening its valve. As boost pressure builds, pressure is forced onto the diaphragm, gradually opening the wastegate. By design, factory wastegates begin opening at 50-60% of maximum boost pressure, thus resulting in less than optimal turbo response and less than maximum boost pressure is achieved as valuable exhaust energy is routed away from the turbine. Hop Up Racing offers a wide variety of boost controllers from top manufacturers such as Greddy, Blitz, HKS, Power Enterprise, Turbo XS and Apexi.