So I recently picked up an older VW Jetta/Bora with the 1.8T motor. I think I’ve somewhat gotten the concept, but I still can’t really seem to figure out how the turbo system actually works. What makes the turbine spin? The air from the intake or the air from the exhaust? How is it connected to the exhaust and why?
In: 5
The **turbine** is spun up by exhaust gas, the **compressor** spins to pull air into the intake.
The turbine and compressor are like a mirror image of each other. As the turbine is spun by the exhaust it transfers that spinning motion to the compressor which is like a fan that blows air into the manifold.
As for why, air and fuel need to mix together to make the engine go. The more air you can introduce the more fuel you can mix it with and the more power you get. Using a compressor to shove air into the manifold at greater than ambient pressure is one way to do this.
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