A turbonormalizer system increases the amount of compressed air that is delivered to the engine by controlling how much of the total exhaust gas bypasses the turbocharger. This bypass route is controlled by a butterfly valve called a wastegate. Closing the wastegate increases the amount of exhaust gases being forced past the turbine wheel. The resultant higher rpm of the turbine and compressor wheels increases the amount of compressed air delivered to the engine.
In this system the position of the wastegate is controlled by the absolute pressure controller. This controller monitors the pressure from the compressor output and maintains a constant air pressure in the "upper deck" of the system by adjusting the position of the wastegate.
The upper deck is the part of the turbonormalizer system that is located between the compressor outlet and the engine throttle plate. The controller is designed to maintain the upper deck pressure at two to three inches of pressure above the maximum manifold pressure the engine would ever need. This type of system works the turbocharger a little harder than some "on-demand" systems, since the components of this system are adjusted to always maintain 33 to 34 inches of upper deck pressure, but this is offset by the fact that there's never any turbocharger lag or spool-up time. A pressure relief valve (pop-off valve) is mounted in the ducting between the compressor outlet and the engine, and is designed to open if the controller malfunctions and allows upper deck pressure (and consequently manifold pressure) to increase beyond safe limits.
In this system the position of the wastegate is controlled by the absolute pressure controller. This controller monitors the pressure from the compressor output and maintains a constant air pressure in the "upper deck" of the system by adjusting the position of the wastegate.
The upper deck is the part of the turbonormalizer system that is located between the compressor outlet and the engine throttle plate. The controller is designed to maintain the upper deck pressure at two to three inches of pressure above the maximum manifold pressure the engine would ever need. This type of system works the turbocharger a little harder than some "on-demand" systems, since the components of this system are adjusted to always maintain 33 to 34 inches of upper deck pressure, but this is offset by the fact that there's never any turbocharger lag or spool-up time. A pressure relief valve (pop-off valve) is mounted in the ducting between the compressor outlet and the engine, and is designed to open if the controller malfunctions and allows upper deck pressure (and consequently manifold pressure) to increase beyond safe limits.