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Why, oh why, did the 3.7L not increase in torque?

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Old 10-16-2008, 01:15 AM
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trebien
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Why, oh why, did the 3.7L not increase in torque?

This has been on my mind, and I haven't found an answer. With the new VVEL timing, additional displacement, and even higher compression... why is the 3.7 rated only 2 ft/lbs higher in torque over the 35HR?

I know we can talk about torque curves, etc. But the peak rating should have increased as well.

Just wonderin'...
Old 10-16-2008, 01:23 AM
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tfmbigdog99
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We would all like to know I reckon.
Old 10-16-2008, 01:26 AM
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krayzrac3r
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turbo it and the torque comes back magically lmao
Old 10-16-2008, 02:04 AM
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G-Pimp
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Old 10-16-2008, 02:06 AM
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bboysteele
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Originally Posted by trebien
This has been on my mind, and I haven't found an answer. With the new VVEL timing, additional displacement, and even higher compression... why is the 3.7 rated only 2 ft/lbs higher in torque over the 35HR?

I know we can talk about torque curves, etc. But the peak rating should have increased as well.

Just wonderin'...
Simple, they engineered it that way. Why? Only the guys at Infiniti can tell you that. My guess is that they wanted a nice torque curve that ran relatively flat which is a good thing.
Old 10-16-2008, 02:25 AM
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SilverRSXJezus
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The peak torque doesn't necessarily have to be that much higher if they are trying to focus on having a flat torque curve and just extending it out to the high end of the RPMs rather than having a peaky torque value down low.


Keep in mind that this is only a 0.2 L increase in displacement, it's not like it's really going to make that much of a difference in torque.
Old 10-16-2008, 03:29 PM
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johnnyg
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My theory is that in the quest to have the G become the Japanese Masarati, they wanted it to be a GT vs a tire smoking stop light eater. keeping the revs high keeps torque flowing and on an interstate ride passing is effortless and quick. Note the 40 to 70 times that are faster than the 335. Where the 335 spanks us from a dig with the torque it has available from 1500 rpm, it runs out of grunt at a relatively low 5600 rpm where we on the other hand have another 2000 revs to go in the torque sweet spot. GT's are built for a different purpose and the G is a great example.

Old 10-16-2008, 04:00 PM
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MMC Racing
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It would be very easy to do a small nitrous system to spray 35-50 off the line to overcome this shortcoming.
Old 10-16-2008, 08:33 PM
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vinnys coupe
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i was and still am very disappointed in the torque numbers. I'de like to know as well
Old 10-17-2008, 12:06 AM
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SilverRSXJezus
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Originally Posted by vinnys coupe
i was and still am very disappointed in the torque numbers. I'de like to know as well


What exactly are you disappointed about? Have you seen how flat the torque line is on the G? And the 335i with the TT makes good power at all rpms, but even that has a slight drop in torque once it goes past 5k rpms, whereas the G continues to literally make around the same bit almost until its redline.


Or would you be happy with a thundering +50 more ft/lbs with a loss of 30 horsepower?
Old 10-17-2008, 02:43 AM
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TerribleONE453
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we need the tq.. not the hp..
Old 10-17-2008, 08:38 AM
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bboysteele
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Originally Posted by TerribleONE453
we need the tq.. not the hp..
But we also need a flat tq curve. We don't want a sudden peak and drop of like some other cars.
Old 10-17-2008, 02:39 PM
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SilverRSXJezus
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Originally Posted by TerribleONE453
we need the tq.. not the hp..


What are you talking about?


Do you not understand how torque and hp are related to one another? Horsepower is a function of torque....


You want a faster car, correct? In that case, you're making more with the 3.7L. Why are you concerned about the PEAK torque figure? That isn't what makes or breaks a race, you know.


You guys need to stop getting all muddled up in a simple peak number and realize that the real importance of the new and improved engine is the sustained flatness of the torque curve that makes it produce more horsepower.
Old 10-24-2008, 10:08 AM
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PearlG37
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Your exactly right. Peak torque has nothing to do with how fast your car is capable of running. Like it was mentioned before, hp is a function of torque. What is important (as mentioned) is the engines ability to sustain a flat torque line. The area under a torque curve is what is really important. So, you can have more torque, but it won't mean anything for performance if it decreases quckly.

This is why we have similar torque but much more hp than the 35.
Old 10-24-2008, 09:45 PM
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KAHBOOM
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Originally Posted by PearlG37
Your exactly right. Peak torque has nothing to do with how fast your car is capable of running. Like it was mentioned before, hp is a function of torque. What is important (as mentioned) is the engines ability to sustain a flat torque line. The area under a torque curve is what is really important. So, you can have more torque, but it won't mean anything for performance if it decreases quckly.

This is why we have similar torque but much more hp than the 35.
spot on


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