Home » News » Cadillac » Cadillac 3.6-liter twin-turbo V6 - official details

Turbocharging increases power and performance with efficiency,but the delay in the delivery of power – known as “turbo lag” – hashistorically been its key limitation. That’s about to change.

 

Cadillac’s first-ever Twin-Turbo, available on the 2014 CTSVsport midsize luxury sedan and XTS Vsport full-size luxury sedan in the U.S.this fall, kicks turbo lag to the curb with a unique combination of smallerturbochargers, top-mounted throttle body and shorter air pathways.

 

The Cadillac Twin-Turbo V6’s patented air flow design, whicheliminates circuitous heat-exchanger tubing, makes the most of engine packagingefficiency to improve torque response time over other air flow designs

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Rated at 420 horsepower in the all-new 2014 CTS Vsport andpaired with Cadillac’s first eight-speed transmission, the Twin Turbo is one ofthe most power-dense engines in the midsize luxury sedan segment, rated at anSAE-certified 420 horsepower (313kw) and 430 lb-ft of torque (583 Nm).

 

Air flow routing volume is reduced by more than 60 percent whencompared with a conventional design that features a chassis-mounted heatexchanger. The water-to-air cooler system achieves more than 80 percent coolingefficiency with only about 1 psi (7 kPa) flow restriction at peak power forfast torque production.

 

Using two smaller turbochargers rather than a single, largerturbo also helps ensure immediate performance because smaller turbochargersspool up quicker to generate horsepower-building air pressure that is fed intothe engine. An integrated charge air cooling system also contributes becausethe compressors blow through very short pipes up to the intercooler.

 

The single, centrally located throttle body atop the enginecontrols the air charge from a pair of turbochargers after the temperature isreduced in the intercooler. This design fosters more immediate torque responseand reduces complexity by eliminating the need for a pair of throttle bodies.

 

Together, smaller turbochargers, top-mounted throttle body andshorter air pathways help sustain peak torque over a broad range – 1,900 to5,600 rpm.

 

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