How Mazda Is Eliminating Turbo Lag

How Mazda's Dynamic Pressure Turbo Works - Mazda CX-9
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The Mazda CX-9 is powered by a 2.5L inline four-cylinder turbocharged engine producing 250 HP and 310 lb-ft of torque. And while turbo-lag is acceptable for many, Mazda was determined to minimize its effects. The SkyActiv engine uses a technology they’re calling “Dynamic Pressure Turbo” which uses a 4-3-1 exhaust and a set of valves that change exhaust airflow depending on the RPM.

Along with a short exhaust manifold, valves to increase exhaust velocity, and a 4-3-1 exhaust, they aim to minimize turbo-lag while simultaneously maximizing performance and efficiency. The 4-3-1 exhaust is critical for exhaust scavenging, creating the “ejector effect” and helping pull out remaining exhaust gases from the previous firing cylinder. Check out the video for full details about how this engine works!

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