Oct 12

Variable Vane Turbo Requires Regular Maintenance and Cleaning

The variable vane turbo is a complex system that works in tandem with a car’s computer to adjust the flow through the vanes depending on conditions for maximum performance. The vanes in the turbo open and close to provide sufficient boost and much quicker spool up. The computer uses the sensors to determine weather or not the vanes should be open or closed. The variable vane turbo is a complex system that works in tandem with a car’s computer to adjust the flow through the vanes depending on conditions for maximum performance. The vanes in the turbo open and close to provide sufficient boost and much quicker spool up. The computer uses the sensors to determine weather or not the vanes should be open or closed.

 

The two most common implementations include a ring of aerodynamically-shaped vanes in the turbine housing at the turbine inlet. In general, for light-duty engines, the vanes rotate in unison to vary the gas swirl angle and the cross sectional area. In general, for heavy-duty engines, the vanes do not rotate, but instead the axial width of the inlet is selectively blocked by an axially sliding wall (either the vanes are selectively covered by a moving slotted shroud or the vanes selectively move vs a stationary slotted shroud). Either way, the area between the tips of the vanes changes, leading to a variable aspect ratio. Keeping these vanes cleaned is vital to the overall performance of the turbo. If your automobile is equipped with turbo and is lagging on acceleration more than usual, you may need to have your system checked.