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 exhaust powers the turbo, which is then used to pull extra air through the intake. The extra air means more oxygen, thus you can combust more fuel and produce more power. The faster the engine is already running, the faster it spins the turbine and the more boost the turbo can provide.
Superchargers, fwiw, also force in extra air but are powered by the accessory belt rather than exhaust spinning a turbine.
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