What Do I Do If I Get This Job?
Jobs & Education0 min ago
No best answer has yet been selected by kezzarooni. Once a best answer has been selected, it will be shown here.
For more on marking an answer as the "Best Answer", please visit our FAQ.I think you're losing a bearing or two somewhere, probably in the turbo. Turbos generally spin at around 20,000 rpm and are fairly prone to wearing out their bearings if not lubricated properly.
Turbos have two 'fans' mounted on a common shaft. One fan (the turbine) is driven by the hot exhaust gasses. This in turn drives the shaft which spins the other fan (the compressor). The compressor compresses the inlet air. The faster the exhaust gasses, the higher the inlet air compression. The higher the inlet air compression, the more power from the engine. The more power from the engine, the faster the exhaust gasses, and so on.
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