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So we decided to seek out those who talk less and race more.Our participants include Kenny Duttweiler, who began experimenting with and racing turbo Buick V6 engines virtually from the moment those black sedans hit the showroom.“In the old days it was typical to see 1.5 to 2:1 backpressure ratios,” Duttweiler says.“Today the backpressure is actually less than the boost pressure.” The ratio Duttweiler is talking about is the relationship of exhaust backpressure to inlet boost pressure.The app will guide you safely to your destination even without an internet connection.Sygic includes high-quality 3D maps that are stored on your device.



The young driver is soon overwhelmed and quickly closes the hood of his car and leaves while a pair of turbo true believers square off in a technical fencing match that looks as if it will devolve into a jihad-like religious riot complete with willing martyrs.Exhaust gas doesn’t burn a second time, so it works just like an emissions-era exhaust gas recirculation (EGR) system, reducing power, except it’s happening at wide-open throttle (WOT).Because of the high backpressure ratio, older turbos required an earlier-closing exhaust valve, which was most easily achieved with a wider lobe-separation angle (LSA).Exhaust gas backpressure is naturally created when the hot gas exiting the exhaust ports arrives at the turbocharger’s turbine wheel.