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Although they've been used on cars for decades, centrifugal blowers have really come into the spotlight just in the past 5-10 years-- perhaps due to their inherent usefulness on an EFI engine. Centrifugals must spin at incredibly high rpm to make boost. It's not uncommon to see one with a final-drive ratio of more than 500 percent overdrive, but they're designed to live and work at that speed. View Related Article
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