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3

Porting your wastegate allows increased flow rates through the gate itself. The gate is a little metal flap (operated by a vacuum operated actuator) that covers a small hole in the rear of the turbo housing hot-side (exhaust side).. The flap usually extends past the diameter of the gate port/hole so that no air can leak. When the flap opens, it allows ...


3

Disclaimer: I've never done this practically. This answer is based on my somewhat limited exposure to turbomachinery theory in automotive applications. It's all about the flow Unlike fixed-geometry turbos, in which the vanes provide optimal efficiency for a single flow, vane angles are adjusted in variable-geometry turbos to enhance efficiency across a ...


5

Dodge installed VNT Turbochargers on cars in 89 and 90. The most well known of which is the 1989 Shelby CSX-VNT. The vanes were controlled by a dual port vacuum actuator. There was nothing electronic on the turbo itself, but there were vacuum solenoids (for boost control) on the lines going to the actuator. The VNT Turbo has movable vanes on the exhaust ...



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