What did Chevrolet do to boost power of its Duramax engines?

We list them down for you
by Patrick Everett Tadeo | Dec 2, 2013
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\"What

As we reported a few days ago, Chevrolet has upgraded its Duramax engines to boost their power output, with the 2.5-liter mill now producing 163hp and 380Nm, and the 2.8-liter unit now churning out 200hp and 500Nm.

Since we\'ve been getting a lot of inquiries as to what the American carmaker did to improve the engines, we\'re listing them down for you:

* High-pressure common-rail system capable of up to 2,000bar (29,000psi);

* Water-cooled variable-geometry turbocharger (for the 2.8-liter) to enhance turbine and engine life;

* Electrical exhaust gas recirculation valve with larger cooler;

* Plastic intake manifold and lighter cylinder head material for lower overall weight;

* Optimized intake and exhaust manifolds to improve intake and exhaust flow;

* Larger exhaust port and water passage to enhance cooling efficiency;

* Balancer shaft to reduce noise, vibration and harshness, and enhance refinement; and

* New engine control module, with newly developed software by GM engineering for quicker response and added accuracy to keep the engine operating in peak form.

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According to Chevrolet, the updated Duramax engines are Euro 4-compliant and can be upgraded to meet up to Euro 6 standards \"if necessary.\" In addition, despite the increase in power output, the 2.5-liter engine\'s fuel mileage figure is still a decent 12.820km/L, while the 2.8-liter unit now does 10.638km/L.

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