What is a twin scroll turbo?

A twin scroll turbocharger is a type of turbocharger that uses two separate exhaust gas inlets and two separate impellers to harness exhaust gas energy more efficiently.

The twin scroll design divides the engine's exhaust pulses into two separate streams, each directed towards a different scroll on the turbine side of the turbocharger. This allows for better pulse separation and reduces the interference between exhaust gas pulses, improving turbo response and reducing turbo lag.

One of the key advantages of a twin scroll turbocharger is the ability to improve throttle response at lower engine speeds and provide more immediate power delivery. This makes twin scroll turbos particularly well-suited for engines with a wide powerband, such as in performance and sports cars.

Overall, twin scroll turbochargers are known for their ability to extract more power from the engine while maintaining good efficiency, making them a popular choice for high-performance vehicles and racing applications.