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Turbo performance is always a gentle balancing act between high rpm power and low rpm boost response, but what if you could have both? Here’s an interesting experimental product we spotted at World Time Attack Challenge that could help. It’s a slightly different take on the implementation of a ‘spool valve’ which is designed to send all the exhaust flow to one scroll of a twin-scroll turbine housing at low rpm to aid spool. Traditionally this is achieved with a mechanical flap that’s located between the e
