Turbonetics Boost Controller

The Turbonetics Boost Controller came in. They are 89.99 plus shipping. This picture is very close to what I have however my tubing is not blue its black. The Boost controller may be mounted inside the engine bay or inside the car is you dare run 15 ft of vacuum hose. Because the Controller is driven by vacuum, the shorter the tubing between connections the faster and more responsive its operation. I am thinking a nifty spot under the hood would be great. This item is said to be able to control boost from 0-25 psi. The purpose of a Boost controller is to limit the pressure going to the opposite side of the spring. Your wastegate spring holds the gate closed pressing against the piston Diaphragm. Pressure from the intake ( when under boost) creates pressure on the opposing side of the spring by a vacuum line. Lets Say you have a " 5 pound spring" on your wastegate. As the Turbo spools up it makes boost. The boost pressure travels through the hose to the opposing side of the spring. The Pressure continues to rise under high throttle until the spring begins to depress opening the wastegate. The wastegate lets exhaust gasses pass around the turbo directly to your exhaust. This slows the turbos speed and reduces pressure. This process happens several times per second, and the wastegate moves every time your foot moves on the accelerator, let off it opens, press down it closes until the desired boost pressure is reached then the turbo stops speeding up.