muscarel - I would say that it would take a really high launch RPM to get a 5.1 0/60, but it's certainly doable based on the info we have. Now if only the G's engine put out around 300 lb/ft of torque in a 3000 - 6000 RPM range, upper 4s would be easy enough despite the weight, and you wouldn't have to beat the hell out of the car to achieve the time.

 

how is it possible the new engine.. that is better then the 3.5HR doesnt perform better ?

ppp

 

It will. What are you referring to?

 

The improved performance of the engine is offset to some extent by the extra weight of the G37 vs the G35. The Cayman S with only 295 HP will undoubtedly be faster than the 330 HP G37. The Cayman's secret is that it weighs only 2950 lbs.

 

Does anybody know the gearing changes in the 7 from the 5? That contribute, as well as the new redline. But, too many variables. We can only guess until some reputable magazines get some testing.

 

ya know... im an idiot... ofcourse the new engine will perform better then the 3.5hr. Why would Infiniti do anything different. I was just looking at the 5.2 0-60 time and know thats around the new 2007 sedan #'s. guess i was looking for something earth shattering to seperate it from the sedan... unfortunately it may only be a couple of 10ths.

ppp

 

Potty,

The 5.2 seconds is published by Motor Trend as an estimate. I'm not sure that Motor Trend has test driven the 2007 sedan (I could be wrong) except for a comparison to a 330i. In that test the G35 sedan ran a 0-60 in 6 seconds!! The heat was terrible that day they mentioned in the test (the 330 ran 0-60 in 7 seconds!).

You are comparing the MT estimate to other road tests that show the sedan doing it in 5.2 or so.

That being said, once we get down to these types of numbers, 0-60 is not going to improve much without a super powertrain. It wasn't like anyone was expecting 0-60 in low 4's (actually, if I remember one person on here was). Improvements will be minor - 5.2 to 5.0 to 4.8, but nothing earth shattering. Remember that supercars are now dipping into the 3's but even that is only a second less than even an ordinary 335. 1/4 mile, 0-120, 5-60 will tell you more about a car.

To Fast1,

The 100 lbs gain will most definitely cut into the engine gains, but the 1st gen 6mt was only putting out 258 lb-ft of torque. The new engine puts out 12 more than that AND is flatter and has 32 more HP. That will make up for the 100 lb gain. The automatic put out around the same torque but is 55 HP short. All taken into consideration, the 0-60 (compared to the '07 sedan) may only improve 0.1-0.2, with the same difference in the 1/4 mile. Trap speeds may creep up 1-2 mph with the extra top end power. Compared to the coupe though, this will be a much faster car (even the 07 sedan is).

 

No you're not bro. I think we're all hoping for something closer to earth shattering but don't really expect it. Without radical design, creature comfort or price point changes the performance improvements will creep as opposed to leap.

 

The 100 lbs gain will most definitely cut into the engine gains, but the 1st gen 6mt was only putting out 258 lb-ft of torque. The new engine puts out 12 more than that AND is flatter and has 32 more HP. That will make up for the 100 lb gain.

muscarel - The 5% torque increase won't buy you much, but if the torque curve is flatter as you suggest, that would be a big help. Again I can't wait to see the torque curve published for the G37. Aside from keeping the weight of their cars down, another secret that Porsche uses is to build engines that produce their maximum torque over a large rev range. If I recall correctly, the Cayman S hits its max torque at around 3K RPM and holds it to around 6K RPM. That's a nice power band and if the G37's engine has a comparable power band, maybe a 4.9 0/60 would be possible with a high RPM launch. Maybe in a month or at most two, we should see some magazine with actual G37 test results.

 

I've attached a dyno I found on the internet. The cayman S one is a bit deceiving. It looks like big spikes, but actually, the torque pretty much starts at 200 and goes up to about 225. Pretty flat all the way to redline which works out to a linear, continually increasing HP curve. This helps the Porsche as does the low weight.

The 2007 G35 dyno has already been posted here. Torque curve is pretty flat as well (+/- 20) up to about 6,000 rpm, and then there is a drop off up to 7,500 rpm. The drop off is not as drastic as the 335s.

From what we have read, the torque curve is even flatter for the G37, which explains the 330 HP.

The G37 also gets the new sedan's slightly more aggresive final gear ratio, which is worth another bump in power and torque to the wheels (which you don't see in the peak numbers).

At the end of the day, magazines were running 1/4 miles at 14.2-14.6 or so for the 1st gen coupe. The new sedan has tested pretty consistently at 13.9. If the G37 ends up at 13.7, which is very possible, that's a 0.5 to almost 1 second improvement over the old coupe. Appreciable.

 

The 5% is nearly the same % increase in weight, so it should be....

 

At the end of the day, magazines were running 1/4 miles at 14.2-14.6 or so for the 1st gen coupe. The new sedan has tested pretty consistently at 13.9. If the G37 ends up at 13.7, which is very possible, that's a 0.5 to almost 1 second improvement over the old coupe.

I think upper 13s will certainly be doable, depending upon how much you are willing to punish your car. As I've posted before, a 5/60 time is far more interesting to me since it approximates the performance that the vast majority of owners will experience on the road.

 

25 more Hp is closer to 10% more power than the 07 sedan and coupe. Weight is up 3% from the sedan and 4% from the coupe. 07 sedan is around 11.6 lbs/hp. G37 is around 11.1. 2007 350Z was around the same (11.1) and it ran a 13.6 or so in the last road test. This is not an exact science of course, but I guess we're keeping ourselves busy while we wait for more info to be released.

 

Road test times are almost always with aggresive launches. In the back of our minds we know which cars are harder to re-produce 1/4 mile times. A WRX for instance may produce low-mid 14's but I know from driving one, that you could only possibly get that from dropping the clutch at redline. The G35/7 is not as drastic as that.

Road and Track - 2003 G35 coupe - 0-30 in 2.3 seconds, 0-60 in 6.1 seconds, 0-100 in 14.9 seconds, 1/4 mile at 14.6 at 98. No 5-60 data shown. Dropped clutch at 4,000 rpm.

Road and Track - 2007 G35 Sedan - 0-30 - 1.9 seconds, 0-60 in 5.4 seconds, 0-100 in 13.5, 1/4 mile in 13.9 at 102. No 5-60 data shown. No notes on how they launched.

From the above, you can see how much faster the new coupe will be from the original. Especially in the 0-30 race (faster off the line) and 0-100.

 

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Fast1, you seem to have a misconception about torque. No offense, but I know the basics about physics

Just as stated, the S2000 does not launch at 6500 because of torque, but rather power.

From what you state, im not sure if you have ever seen a typical powerband. The higher the RPM's, the more power (HP). But as the power rises, usually after 4k, torque dramatically decreases.

Here's my proof. Look at how HP dramatically increases from 3k to 6.5k rpm's, and note how little torque is gained from 3k to 6.5k rpm's. What does this mean? They launch from 6k because of the lack of power in the low rpm range. I highly dount they would risk their clutch for 15 tq:





In a G35's case, luckaly we do not have to launch at 6000 to achieve power. A stock G35 6MT has enough power at 3000 rpms to achive a good launch. Yet we achieve maximum torque at around 5000. In your theory, we would have to launch from 5000 rpms to achieve a great launch.

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