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Turbo Question and Answer #2
What are the main differences between a Single and Twin Turbo setup?
 
1)  A single turbo receives exhaust flow from and supplies air to all cylinders.

2)  The most common type of twin turbo setup is the parallel system where each turbo is fed by ½ of the engine's cylinders. Here, both compressors supply air to the intake manifold simultaneously.

3)  There are also sequential twin turbo systems, which run on one small turbo at low engine speeds and switch to two parallel turbos at a predetermined engine speed and/or load.

4)  Furthermore, there are series twin turbo systems where one turbo feeds the other turbo. These are primarily used on diesel engines due to the extremely high boost levels that can be generated.

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