Post by
Sweet Lew »
https://forums.nicoclub.com/sweet-lew-u196580.html
Wed Jun 27, 2012 10:58 am
I had the option of a 2008 G35xS sedan (28k miles) or a 2009 G37x sedan (36k miles) for a little more money. I ended up with the 2008 due to the lower mileage and Sport package. At the time couldn't justify the extra money for a few more ponies and the same TQ. Now that I have researched the motors even more, I wish I went with the 37. Even though the HR is a MAJOR improvement to the DE, the VHR is supier to the HR. From Wikipedia:
The updated VQ35HR is more powerful (306 hp (228 kW) at 6,800 rpm and 268 lb·ft (363 N·m) at 4,800 rpm), more fuel efficient, and more responsive than the previous VQ35DE. The "HR" stands for "High Revolution" or "High Response". A dual-path intake (two air cleaners, throttle bodies, etc.) lowers intake tract restriction by 18 percent and new equal-length exhaust manifolds lead into mufflers that are 25 percent freer flowing. The intake is said to benefit from a ram-air effect adding three horsepower at 60 mph. Electrically actuated variable valve timing is new on the exhaust cams which broadens the torque curve. The new engine block maintains the same bore and stroke, but the connecting rods were lengthened and the block deck was raised by 8.4 mm to reduce piston side-loads. 80% of the internal components have been strengthened or redesigned to handle the increased 7,500 rpm red line, along with the use of larger crank bearings with main bearing caps reinforced by a rigid ladder-type main cap girdle. With an increase in compression ratio from 10.3:1 to 10.6:1 these changes add 26 more horsepower. Torque is down 2 pound-feet (2.7 N·m) from the old DE engine (268 vs. 270). The engine now sits 15 mm lower in the chassis for a lower center of gravity.
The VHR:
2008 G35 model range but the sedan now also sports the 3.7-liter VQ37VHR "VVEL" V6, rated 328 hp (245 kW) at 7,000 rpm and 269 lb·ft (365 N·m) at 5,200 rpm that was previously introduced in the G37 Coupe. Although the engine gains only 0.2 kg·m (2 N·m; 1 lb·ft) torque over the VQ35HR and this torque value arrives at a later 5,200 rpm vs. 4,800 in the VQ35HR, the torque curve itself is improved and flattened across the rpm range via Nissan's new VVEL (Variable Valve Event and Lift) variable valve timing resulting in better throttle response and low rpm torque. The G37s VQ37VHR engine has been touted by car magazines and reviewers as an improvement over the VQ35HR engine mostly adding much more refinement and smoother engine operation, especially at high rpm where the VQ35HR engine was frequently criticized for NVH and sounding strained, harsh and loud.
I still love my G35, but if I could do it all over again, I'd go with a G37x with Premium and call it a day.