• May 21, 2007
Infiniti hasn't announced its official peak power numbers for the 2008 G37 coupe, so the impatient folks at Automobile threw one on a chassis dyno to see how the power it puts down at the rear wheels compares to the 330 hp and 270 ft-lbs. of torque the Japanese automaker estimates the car will make. It turns out Infiniti wasn't exaggerating about how powerful the G37's new 3.7L VQ37VHR with infinitely variable valve timing is, and the new engine blows away the previous 3.5L motor in every way.
According to Automobile's dyno graphs, the new 3.7L produces 287 hp and 236 ft-lbs. of torque at the rear wheels, which means friction in the drivetrain accounts for about a 13% loss in power from the flywheel. The previous 3.5L VQ V6 used in the 2007 G35 coupe produces 236 hp and 218 ft-lbs. of torque at the wheels. This means that although the new engine is only 5.6 percent larger in displacement, it produces almost 22 percent more power than the engine it replaces. Automobile does note that it can't be sure if such a large increase in power is due to the new engine or reduced friction in the drivetrain, but suspects that since the drivetrains of the 2007 and 2008 model are similar that the gains are mostly from the motor.

You can check out all the dyno graphs from Automobile by clicking on the Read link and videos of the new Infiniti G37 being dyno tested after the jump.

[Source: Automobile]



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  • 33 Comments
      • 7 Years Ago
      Is the 3.7 going to replace the 3.5 in all of Nissan's lineup? I would love to see a Z with this new engine.
      • 7 Years Ago
      Ello- Good point and very true.

      However for this relatively new commer to be taking a bite out of the sales of the 3's since it launched in 2003 says it all. They mave had had no history with the G series, yet in 4 short years, BMW is quite concerned about the competition. As well they should be. Infiniti may not be able to make a car as lux. or as refined to some tastes, but when it can put this kind of total package together for a lower price, it has and will eat 3 series sales.

      The new sedan has been doing just that since it was launched in December, and for any car maker to take away buyers from a long established segment leader, such as the 3 series has been for years now - it shows they must be doing something right. I am not predicting future sales above and beyond the 335, but it would appear they have made their good car better, and it should give the 3 a nice closer competitor then the 3 has seen in a long time. ALl for less money, not a bad package.
      • 7 Years Ago
      The 3-series will have a Quaife differential for retrofit. It needs the torque sensitive differential because it has so much bottom end power.

      The G has its speed sensitive, (and it needs it, 54/46 weight distribution) because it has top end power. But to chase the new M3 it requires bigger tires.
      No problem, the base coupe wheels are 8" wide, ditch the 225/50 and get 245/45
      the 19" are 8.5" & 9", so 245/40 fronts and 255/40 rear replace the 225/45 and 245/40
      All this assuming Nissan left room.

      The E46 3-series '03.5-'05 ZHP, great exhaust woffle from the engine.
      The 350Z could use a track model with the VQ37HR, but is plenty fast as is.
      http://www.caranddriver.com/assets/download/0706_fourkind_powertrain_ss.pdf
      • 7 Years Ago
      That's quite a bump. And with better fuel economy. Wonderful. Watch out BMW.
      • 7 Years Ago
      the car makers need to stop on this horsepower war... the power cars of today produces are way more than enough for daily, even track usage. they need to turn such resources to improving fuel economy... more power consuming same gas consumption is not impressive anymore. i want same power, with GREATER emphasis on improving fuel consumption...

        • 7 Years Ago
        They *could* have it both ways (kind of):

        Small displacement, turbocharged motors (especially small turboed diesels). Works for Europe, and I'd say would work here as well if only people were willing... great economy when just going about town or commuting; and if you want to have a little fun, that's there for ya too.

        But people in this country won't "get the message" until they push gas prices to $5/gal =(
      • 7 Years Ago
      Of course, you could just read the associated article at http://www.automobilemag.com/auto_shows/2007_new_york/0703_2008_infiniti_g37_coupe/ where you would see such choice phrases as:

      The G37 will be available with a 6-speed manual transmission (6MT) or a 5-speed automatic. 6MT and sport-pack automatics, like the test mule we drove, will have limited-slip differentials.

      But that wouldn't be nearly as fun as speculating about CVTs... There's information about 4WS in there as well, but I wouldn't want to give it all away...
      • 7 Years Ago
      #20 The speed and RPM are rising together because it is being dynoed in one gear. There is no CVT option for the "S" model G37 coupe, only a 6MT.
      • 7 Years Ago
      I don't think fuel economy per see is a problem. For example my old car was a 2001 Lexus IS 300 and now my new car is a Lexus GS 350 which actually gets better fuel economy (although only marginally so).

      My new car is also faster on both straights and in most corners.

      However the one thing I notice about my new car is its size and weight. You can't throw it as easily around the corners as the IS 300. Yes the IS 300 didn't have the same grip or power but it was able to corner much more tightly.

      On sweepers this isn't so much of an issue but on sharp corners the GS 350 requires much more thought and input than the IS 300.

      This leads me to conclude that the primary problem in car design nowadays is weight and not horsepower or fuel economy per see.

      If you look at the IS 350 compared to the IS 300 you notice an increase in weight of 300 pounds.

      Personally I think automakers in general(and Lexus in particular) should have concentrated on cutting vehicle weight. If you reduce vehicle weight you can improve both fuel economy and performance.

      Not only would a weight reduction make the car far more agile and nimble around sharp corners it would also improve engine pickup and fuel economy.

        • 7 Years Ago
        Exactly, Alex. I'm glad someone else sees it too.

        I know its not directly related to the G... but a few weeks ago, I was just loooking up some quick specs on my dad's minivan (to see what kind of jack stands I should be getting for it).

        Well, as it turns out, prior to about 2003, the Sienna was 3932 lbs.

        How much is it in 2007? 4270 lbs, with a gross weight of 5690.

        5690 pounds. Goodness gracious.
      • 7 Years Ago
      Doesn't everyone remember that the previous engines were actually overrated but Nissan chose not to re-rate their engines?

      I'm not the biggest fan of the engine note when it comes to Infinitis but it will definitely be one sweet car.
      • 7 Years Ago
      Whats with the 'S' next to G37? I have not seen mention of that before? Any ideas? I doubt the Automobile guys riced it out by putting an Integra S decal next to the 37 :-)

      • 7 Years Ago
      'Infact, while strolling around a BMW forum, i found a thread about BMW owners trying to figure out how to make their exhaust sound like a g35.'

      I find that hard to believe. Not that any BMW owners wouldn't appreciate the sound or looks of a G35 but that they would want to change the sound of their own engines to match a G35.

      • 7 Years Ago
      Wow! I know I should expect this kind of dumb bickering and ignorance to come out of comments left on a videos comments, but I've heard lots of ignorance come out of here that should not have occured.

      The power vs. fuel economy is asinine. Auto manufacturers are giving us both, and this is true of Nissan as their engineers have given what they say will be better fuel economy from the VQ37 than we got in the VQ35. Beyond that, fuel consumption on todays fuel injected cars has more to do with driving habits than it does with engine size. Recent figures from CNN Auto suggested a 15-98 cent per gallon savings could be acheived with more conservative driving given a $2.97 avg gallon. That's almost a third more mpg for not driving like an @sshat! Little accellerations here and there aren't nearly as detrimental as people who speed up to change lanes (usually sans blinker), then hit their brakes to keep from rear-ending the car in front of them (you know who you are). Stop and go driving destroys fuel economy.

      About this car in general, the car is obviously running the CVT. Don't believe me? Watch the gauges again and notice that the speed and RPMs rise together at an alarming rate. In order to go faster, the CVT will lower the RPMs by "letting out some gearing" thus making the gears taller and the car could achieve higher speeds.

      The S is a trim also found on the sedan. It's an indication of a sportier seats, a viscous LSD, fancy stitching on the sterring wheel, aluminum pedals.

      I'm actually sad to see that they didn't get to test the 4AWS model.

      About the sound, Nissan actually gave a presentation where they said that one of the goals with the current and future VQ series engines was a more pronounced engine sound. This is one of the reasons behind the dual exhaust you will find on the current VQ35HRs. A lot of people love the gurgle of the VQ35 and it sounds nothing like an uncorked econo-box. The video obviously doesn't capture the sound.

      A search and some research could cure a lot of you guys from sounding like a bunch of teenagers bickering in a chat-room. For those of us who are in the know and are real excited about the new FM platform coupes. I'm sure someone will get all offended that I 'came down' on them and start calling names and being childish. But before you do, ask yourself if I'm wrong.
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