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I was curious what controls the boot levels? What I mean is how? ( the electircal/mechanical parts ) How does it work? I know you control by a boost controller that can be manual or computerized or what not, but how do they change boost settings?
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SC's work differently but for a turbo, if everything is working properly, then the wastegate controls the boost. The wastegate is a valve in the exhaust line that allows exhaust gasses to bypass the turbine blades. The valve is forced open when the pressure reaches a designed level. When the gasses bypass the turbine, pressure is relieved or maintained. You can use a boost controler to alter the pressure signal that raches the wastegate actuator to increase the pressure required to open the wastegate. The boost controller uses a second valve to control how much of the pressure signal actually reaches the wastegate actuator, thereby increasing the boost pressure required to open the wastegate.