Description
Wastgated turbos have always been limited to fixed aspect ratios, too small the turbo is choked at high speeds, and too large and the turbo fails to make boost at low speeds. VNT turbos used on the Ranger overcome this using a variable nozzle that allows the aspect ratio to be altered as conditions change, resulting in a more more efficient and better performing turbo.
The “Torque Performance Plus” upgraded turbo, retains the VNT technology but customizes it to our specified requirements. The turbo is based on a Garrett GTB2256VK unit but with the housings and nozzle custom machined to accommodate a new larger turbine and compressor wheel. A larger shaft assembly is used to improve reliability as the factory turbo is prone to shaft failures. Actuator assembly is taken from a PX2/3 turbo and modified to use with the upgraded turbo, so factory boost control is retained.
All turbo’s are balanced and individually calibrated on a VNT min-Flow bench, which allows us to precisely set VNT settings and manages the correct exhaust flow to the turbo charger.
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