In this fourth instalment of the ‘How a Turbo Works’ series – Part 4, we discuss what and how the wastegate works.
How a Turbo works – Wastegate
The compressor turbine wheels job is to spin drawing in vast volumes of air. This goes into the engine and the turbocharger’s output exceeds the engine’s air pressure. This unequal balance is what produces boost – read part 3 in this series to learn more about how boost is produced.
But since a turbo can spin far beyond what is safe, the speeds restricted by the wastegate.
The wastegate is a common way to control the speed of something within a system. This can be further expanded by an electronic boost controller. The introduction of a wastegate allows the exhaust gases to bypass the turbine.
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