What Is a Non VGT Turbo?

Almost every turbocharged diesel engine today comes from the factory equipped with a VGT turbo. A non VGT turbo is the older, and less complex, technology. Many truck owners consider replacing a VGT turbo with a non VGT unit to be an upgrade.

In a non VGR turbo the critical parameter is the A/R ratio. This refers to the cross-sectional area of the exhaust inlet and the offset of the inlet from the center of the turbine. It’s an indicator of the torque the exhaust gases can apply and it governs how quickly the turbo will spool up at varying engine speeds.

When buying a non VGT turbo, you select the A/R ratio you need for the driving characteristics you want. We’re here to help with that.

What’s the Difference Between VGT and Non VGT Turbo?

Variable geometry means the turbocharger can adjust the leverage applied to the turbine. The most common method is to direct gases onto different regions of the turbine by angling teardrop-shaped vanes. These are moved by a rotating component called a unison ring.

The benefit is higher power and torque across the rev range because the turbo is always operating at the highest possible efficiency. The downside is there’s lots that can go wrong. Unison rings wear and can stick, and precise control depends on multiple sensors and electronics. In contrast, a non VGT turbo tends to last longer and be more reliable, therefore, for an engine such as the 6.0 Powerstroke, a non VGT turbo is often considered more desirable.

Product Overview

Whether you need a rebuild kit, a replacement turbo or a non VGT turbo kit, you’ll find it here. We carry an extensive range of non VGT turbos from Smeding, plus complete kits that include the manifold. (Remember, Smeding manufactures turbochargers right here in the US.) Or if you want to rebuild a turbo yourself, we also have Kc Turbo rebuild kits for Borg Warner units.

As specialists in Powerstroke, Cummins and Duramax diesels, we sell more than just non VGT turbos. We aim to be your source for everything you need to keep these engines running and to make them run better. Plus, our commitment to superior customer service means you can be assured of the help and support you need.

Our web pages break down diesel engine parts by make and model, and detailed pictures ensure you know exactly what you’re looking at. Browse our product pages for the parts for your engine, and contact us by phone, email or through the form on our website with all your questions.

Smeding Diesel S475 T4 Turbocharger

Powerhouse Diesel