Leading the enhancements to the 2008 Infiniti G37 Coupe is the first-ever application of the new 3.7-litre V6 engine with VVEL (for Variable Valve Event and Lift).
Estimated at 330 horsepower and 270 lb-ft of torque, the new "VQ37VHR" contains approximately 35 percent new and unique parts from the new VQ35HR engine introduced in the 2007 G35 Sedan just last year. Both the Coupe's VQ37VHR and the Sedan's VQ35HR engines are based on the award-winning VQ engine series, named one of the "Ten Best Engines" by Ward's Auto World magazine for 13 consecutive years.
Along with utilising a larger displacement than the previous 3.5-litre powerplant, the G37 Coupe's new VVEL system combines hydraulic-controlled variable valve timing and electronically controlled variable valve lift on the intake side to help improve performance and response. The VVEL system is also expected to improve emissions and fuel efficiency. The VVEL intake camshafts, featuring continuously variable lift control teamed with the Continuously Variable Valve Timing Control System (CVTCS), allow for a 7,500 rpm redline.
The engine also features increased cylinder block height (from the previous 3.5-litre design), ladder frame construction for greater rigidity, large crank journal and pin diameters, asymmetric piston skirts, twin knock sensors, an electronically controlled "drive-by-wire" throttle system, molybdenum coated lightweight pistons, Iridium spark plugs and a symmetric twin air intake system.
A new, specially tuned dual exhaust system has been designed with equal length exhaust manifolds and low muffler exhaust backpressure to help improve engine breathing. Both intake and exhaust enhance driving pleasure with their authentic performance notes.
Rated at an estimated 330 horsepower, the new engine is not only considerably more powerful than the previous generation G Coupe (rated at 275 hp with 5AT, 293 hp with 6MT), but is expected to offer increased fuel mileage and reduced emissions levels. Overall vehicle fuel economy improvements are estimated to be nearly one mpg better than the G35 Sedan and nearly two mpg better than the previous generation G35 Coupe (actual EPA mileage estimates and emission information to be announced at a later date).
New GT-R , 3.7 liter motor ? We have heard 3.7 for a while. There are also the Nismo 3.8 liter versions of the 350 Z running around in Japan. No replacement for displacement.