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Advanced turbocharger with variable geometry turbine

Understanding Variable Geometry Turbochargers

Variable Geometry Turbochargers

Welcome to TurboWale, your one-stop shop for all things turbochargers. Today, we’re going to delve into the world of Variable Geometry Turbochargers (VGTs), a cutting-edge technology that’s revolutionizing the turbocharger industry.

What is a Variable Geometry Turbocharger?

Variable Geometry Turbochargers, also known as Variable-Nozzle Turbines (VNTs), are a type of turbochargers designed to alter the effective aspect ratio (A/R ratio) of the turbocharger as conditions change. This is achieved by using adjustable vanes located inside the turbine housing between the inlet and turbine. These vanes affect the flow of gases towards the turbine.

Why Variable Geometry Turbochargers?

The benefit of the VGT is that the optimum aspect ratio at low engine speeds is very different from that at high engine speeds. If the aspect ratio is too large, the turbo will fail to create boost at low speeds; if the aspect ratio is too small, the turbo will choke the engine at high speeds, leading to high exhaust manifold pressures, high pumping losses, and ultimately lower power output. By altering the geometry of the turbine housing as the engine accelerates, the turbo’s aspect ratio can be maintained at its optimum. Because of this, VGTs have a minimal amount of lag, a low boost threshold, and high efficiency at higher engine speeds.

The History of Variable Geometry Turbochargers

The rotating-vane VGT was first developed under Garrett and patented in 1953. One of the first production cars to use these turbochargers was the 1988 Honda Legend; it used a water-cooled VGT installed on its 2.0-litre V6 engine. The limited-production 1989 Shelby CSX-VNT, with only 500 examples produced, was equipped with a 2.2-litre Chrysler K engine with a Garrett turbo called the VNT-25.

The Future of Variable Geometry Turbochargers

The purpose of a variable geometry turbocharger is to maximize the amount of pressure you have across your rev range. It is the next generation of turbocharger technology, using variable vanes to control exhaust flow against the turbine blades. They are often used in diesel engines since lower exhaust temperatures result in fewer failures.

TurboWale and Variable Geometry Turbochargers

At TurboWale, we offer a wide range of Variable Geometry Turbochargers suitable for a variety of vehicles. Whether you’re looking for a turbocharger for your race car or your daily driver, we have the perfect VGT for you. Shop with us today and experience the power and efficiency of Variable Geometry Turbochargers!

Please note: Always consult with a professional before making any modifications to your vehicle. TurboWale is not responsible for any damage caused by the improper installation or use of turbochargers.

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