Why does turbo engine whizz?

The "whizzing" sound you hear from a turbocharged engine is actually the sound of the turbocharger's turbine spinning. It's not the engine itself making that noise, but rather the forced air being pushed through the turbocharger.

Here's a breakdown of why it happens:

* How turbochargers work: Turbochargers use exhaust gases from the engine to spin a turbine. This turbine is connected to a compressor, which forces more air into the engine's cylinders.

* Turbine speed: The turbine spins incredibly fast, often reaching speeds of 100,000 to 200,000 revolutions per minute (RPM). This high speed causes the "whizzing" sound.

* The sound itself: The "whizzing" is a high-pitched whistling sound that is created by the rapid movement of air through the turbocharger.

The intensity of the "whizzing" can vary depending on several factors, including:

* Boost pressure: The higher the boost pressure, the faster the turbine spins and the louder the sound.

* Turbocharger size: Larger turbochargers tend to produce a deeper, more noticeable "whizzing" sound.

* Exhaust system: The design of the exhaust system can amplify or dampen the turbocharger noise.

So, the "whizzing" sound is a normal and often desirable characteristic of turbocharged engines. It's a sign that the turbocharger is working properly and providing additional power to the engine.