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 pressure of the exhaust causes the turbo to spin, thus increasing the input of fuel and air into the engine. This is also what creates “turbo lag”. Since the turbocharger is powered by exhaust pressure, the turbo doesn’t have much available power until the engine starts to speed up. Engine starts to speed up, turbo gets more speed, boost goes up, and the engine can generate more power.
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