What does twin-turbocharging mean?

[LaCali]

Twin-turbocharging is one of the methods of turbocharging. The advantages and disadvantages of twin-turbocharging are introduced as follows: Advantages of twin-turbocharging: It makes the intake volume much larger than the exhaust volume, and the second turbo can also be used for consumption. Power and torque are also greatly improved, and most importantly, it solves the traditional turbo lag phenomenon. Disadvantages of twin-turbocharging: The cost and fuel consumption are higher compared to a single turbo. Twin-turbocharging involves connecting two turbos in series, one large and one small, or two identical turbos in parallel. At low engine speeds, less exhaust gas is needed to drive the turbo to rotate at high speed to generate sufficient intake pressure, reducing the turbo lag effect.