Thread: New Sentra Turbo model announced.

At the heart of the 2017 SR Turbo is its new 1.6-liter Direct Injection Gasoline (DIG™ turbocharged engine rated at 188 horsepower at 5,600 RPM and 177 lb-ft of torque at 1,600 - 5,200 RPM – 64 more horsepower and 52 more lb-ft of torque (41% more) than the non-turbo 2017 Sentra SR grade's 1.8-liter powerplant1.

The new 16-valve DOHC aluminum-alloy inline 4-cylinder engine includes a 10.5:1 compression ratio, Continuously Variable Valve Timing Control System (CVTCS), spray-coated and mirror-finish cylinder bores, a variable pressure oil pump and a low-pressure EGR system, which helps lower exhaust gas temperature and improve knock sensitivity.

The Continuously Variable Valve Timing Control System (CVTCS) includes an intermediate lock function on the intake side, while the use of spray-coated and mirror-finish cylinder bores (versus the iron liners) provides an estimated 12 percent reduction in internal friction, which also improves anti-knock performance and reduces engine weight.

The DIG™ system helps improve combustion, enhancing power, torque, economy and emissions, while the use of the turbocharger and intercooler helps boost power. The variable timing control for both intake and exhaust cycles improves low-end engine response.

The enhancements to the independent strut front/rear torsion beam suspension are designed to handle the increased power and include a 10 percent increase in front spring stiffness. The SR Turbo-specific front and rear dampers have been optimized for use with the 17-inch wheels and tires – front damping has been increased 23 percent and rear damping by 50 percent.

In addition, the suspension benefits from body enhancements that range from increased front cowl thickness to new steering gear mounting. The Electric Power Steering (EPS) system changes include a larger steering motor and revised electronic mapping to provide a balanced feel between reduced effort at parking and low speed situations and enhanced feedback on highways and winding roads.

Larger front brakes and calipers are utilized in the SR Turbo's 4-wheel disc brake system – 11.7-inch vent front (versus the 11.0-inch front discs of the standard Sentra) and 11.5-inch solid rear discs. In addition, the Active Understeer Control system has been optimized for the SR Turbo.