1. Home
2. Agency Power Boost Controls

Agency Power Boost Controls

Boost Controllers for Turbo and Supercharged Vehicles

The best thing you can do to protect the longevity of your turbocharged or supercharged vehicle is to add a boost controller. Manual boost controllers or electronic boost controllers are a must. Protect your investment with a boost control unit from Vivid Racing.

The Function of a Boost Controller:

Without a boost controller, air pressure is fed from the charge air (compressed side) of the turbocharger directly to the wastegate actuator via a vacuum hose. This air pressure can come from anywhere on the intake after the turbo, including after the throttle body, though that is less common. This air pressure pushes against the force of a spring located in the wastegate actuator to allow the wastegate to open and bypass exhaust gas from reaching the turbine wheel. In this simple configuration, the spring's springrate and preload determine how much boost pressure the system will achieve. Springs are classified by the boost pressure they typically achieve, such as a "7 psi spring" that will allow the turbocharger to reach equilibrium at approximately 7 psi.

One primary problem of this system is the wastegate will start to open well before the actual desired boost pressure is achieved. This negatively affects the threshold of boost onset and also increases turbocharger lag. For instance, a spring rated at 7 psi may allow the wastegate to begin to (but not fully) open at as little as 3.5 psi.  Achieving moderate boost levels consistently is also troublesome with this configuration. At partial throttle, full boost may still be reached, making the vehicle difficult to control with precision. Electronic systems can allow the throttle to control the level of boost, so that only at full throttle will maximum boost levels be achieved and intermediate levels of boost can be held consistently at partial throttle levels.  Read more about Boost Controllers Here at Vivid Racing.

Buying from Vivid Racing is the best choice you can make. We back every part we sell with our personal guarantee of satisfaction.

Buy online or give one of our world class sales professionals a call at 1-480-966-3040 If you don't see what you are looking for Call Us. We can help. Vivid Racing was voted #1 in customer service nationwide!

Hands-On Experience and Professionalism is what makes us the best!

Please use the vehicle selector at the top left to select your vehicle.

Vivid Racing carries Boost Controllers from all the top manufacturers in the automotive industry. Our manufacturers include: Agency Power, AMS, ApexI, Blitz, Forge, Greddy, HKS, Perrin, Power Enterprises, Turbosmart and TurboXS

Agency Power Industries LLC was developed out of the need to provide quality, functional, and fashionable racing products. Starting from sway bar endlinks for the Subaru WRX back in 2003, Agency Power now has over 300 part numbers for cars ranging from the STI, EVO, M3, 996, TC, and more. Based out of Arizona, Agency Power has established itself as one the core aftermarket companies for Subaru WRX STI and Mitsubishi EVO products. With new focus on the Porsche and BMW market, Agency Power is constantly developing new functional and race proven products. With dealers worldwide, the AP brand is recognized globally. Working with top distributers and tuners in the USA, AP can be found in Singapore, England, Canada, Australia, South Africa, and other parts in the EU.