A healthy steady state wide open throttle WGDC for the RZR turbo or X3 Turbo is 65-80% duty cycle at low altitude, and up to 65-85% at high altitude. If you are over that you want to adjust the waste gate and shorten the rod. If you are below that range you will want to lengthen your waste gate rod.

A 0% Wastegate Duty Cycle (WGDC) setting will allow the solenoid to stay fully closed; which will force the turbo to run mechanical boost pressure. A 100% WGDC setting will force the solenoid to stay fully open; which will force the turbo to run maximum boost pressure.

How does a wastegate work? The wastegate is held shut by a spring inside the actuator, but when the boost pressure exceeds the pre-set maximum, it compresses this spring, progressively opening the wastegate. This allows the exhaust gases through, so that they bypass the turbine, regulating its speed.

WGDC = WasteGate Duty Cycle. This is the amount of time that the solenoid is bleeding air from the wastegate. Since air pressure opens the wastegate, the more time per unit of time that you are bleeding air from it, the less / later the wastegate will open, the more the turbo will spool, and the more boost you will get …

A turbocharger is comprised of a compressor and a turbine linked by a shaft. When the turbine has reached the speed necessary to hold the boost that we want, the wastegate opens to divert extra exhaust gases and maintain the turbo speed we want to generate the boost we desire.

The turbo boost solenoid (a.k.a. wastegate solenoid) monitors the amount of boost generated in a turbocharged motor. Faulty turbo solenoids won’t properly monitor the amount of boost generated in a turbocharged motor, which will decrease the life of the turbo and motor.

Stress caused by an aging turbocharger or by a motorist increasing boost pressure from the turbocharger can overwhelm the spring that opens the wastegate at a specified pressure. In these case, the wastegate will flutter because the spring cannot keep the gate fully shut.

TD Boost Error shows where your car is under or overboosting. Keep in mind, you also won’t always hit the requested boost pressure under every circumstance. For example this value isn’t very useful when you aren’t driving at full throttle.

A wastegate is a valve that controls the flow of exhaust gases to the turbine wheel in a turbocharged engine system. The primary function of the wastegate is to regulate the maximum boost pressure in turbocharger systems, to protect the engine and the turbocharger.

A 0% Wastegate Duty Cycle (WGDC) setting will allow the solenoid to stay fully closed; which will force the turbo to run mechanical boost pressure. A 100% WGDC setting will force the solenoid to stay fully open; which will force the turbo to run maximum boost pressure.

There is no bleeding. Thus, at 100% the pathway is interrupted and no air reaches the wastegate actuator at all. Thus, you get the full pressure possible. With a bleed system there is still pressurized air reaching the wastegate actuator. It is just being bled off as quickly as the stock system can do it.

An electronic boost controller is the latest form available to most builders. It is an electronic air control solenoid or stepper motor that is usually controlled by pulse width modulation and uses a signal from the ECU or an external controller to adjust the wastegate duty cycle.

The turbo speed needed for a particular boost level depends on many variables including engine size, how well the engine breathes, turbo size, engine speed, temperature, etc. The wastegate is controlled by a spring and diaphragm actuator and that spring determines what we call spring boost pressure.