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How does this tiny F1 engine hit 20,000 RPM?

Cosworth reveals a single-cylinder F1 test engine built to develop high-performance racing technology before scaling it into ...
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This tiny F1 engine revs to 20,000 RPM

This video shows a small but powerful Formula 1 test engine with just one cylinder. Even though it’s only 300cc in size, it produces 90 horsepower and can rev up to a crazy 20,000 RPM. It’s used by ...