7-speed Transmission Info
#16
Originally Posted by Mike@RiversideInfiniti
I prefer the F1 'pull shift up, push shift down', but its always easier to explain to people...
push up to shift up. pull down to shift down.
+1 on the DRM.... I was experimenting in a FX today.... 7th gear at 45mph... gotta hit the paddle FIVE TIMES to shift into lowest avail gear for max power.... 7->6->5->4->3->2
I vote let DS just skip gears for you![Big Grin](https://g35driver.com/forums/images/smilies/biggrin.gif)
push up to shift up. pull down to shift down.
+1 on the DRM.... I was experimenting in a FX today.... 7th gear at 45mph... gotta hit the paddle FIVE TIMES to shift into lowest avail gear for max power.... 7->6->5->4->3->2
I vote let DS just skip gears for you
![Big Grin](https://g35driver.com/forums/images/smilies/biggrin.gif)
![Roll Eyes (Sarcastic)](https://g35driver.com/forums/images/smilies/rolleyes.gif)
At least Infiniti got the paddles right though, unlike Porsche.
And yes, it would be nice if DS would skip gears.
#17
Originally Posted by Mike@RiversideInfiniti
I prefer the F1 'pull shift up, push shift down', but its always easier to explain to people...
push up to shift up. pull down to shift down.
push up to shift up. pull down to shift down.
![Big Grin](https://g35driver.com/forums/images/smilies/biggrin.gif)
And the stick moves forward and backward, not really "up" and "down."
If it's so controversial, the car companies should just make it user selectable. It's all electronic anyway.
#20
final drive
http://www.infinitieurope.com/g37/fe...ications.html#
No assurance that the USA specs will be the same,
But the European web site now shows 3.357 for the A7.
- Ray
Still waiting . . .
No assurance that the USA specs will be the same,
But the European web site now shows 3.357 for the A7.
- Ray
Still waiting . . .
#24
#25
![Lightbulb](https://g35driver.com/forums/images/icons/icon3.gif)
I found this website that can calculate the estimated vehicle speed at a given engine speed.
http://www.f-body.org/gears/
http://www.f-body.org/gears/
#27
overall ratios
Originally Posted by Mike@RiversideInfiniti
Final drive is 3.357
“geared more aggressively than even the six-speed manual gearbox.”
And with the 3.36 final drive, more aggressively than the A5 also . . .
First, overall, in the A5 = 14.17:1
First in the A7 = 16.53:1.
Second A5 = 8.67:1
Second A7 = 10.72:1
Third A5 = 5.64:1
Third A7 = 6.85:1
Fourth A5 = 3.69:1 ( 1:1 )
Fourth A7 = 4.74:1 ( 1.41:1 )
Fifth A5 = 3.10
Fifth A7 = 3.36 ( 1:1 )
Sixth A7 = 2.89
Seventh A7 = 2.59
#28
what does all this mean ???
RE – MPG:
My guess, as I have posted above, is that
The G37 Sedan w/A7 will reportedly post 2 MPG higher
in the EPA highway # and seems likely at least that
much higher in actual highway style cruising.
To me, 2 or 3 MPG means:
A – 10% or so less fuel expense in much of my driving.
B – approx. 38 to 57 additional miles per tank \ range
C – Another small decrement in my personal carbon
and fossil fuel use. . .
I do understand that 2 or 3 MPG mean little to some people, even now.
RE - ‘a tenth or two’:
Speculation remains rampant regarding any difference in acceleration between the G35 Sedan w/A5 and the G37 Sedan w/A7.
[ sigh ]
Quicker is better – to me.
I have been somewhat ( ahem ) spoiled by driving over 30,000 miles in a rather quick car. [ Corvette ]
A few ‘back of the envelope’ calculations suggest to me that, with the 3.36 final drive & the gearing of the new A7:
The ‘rate’ of acceleration to 60 will likely be noticeably quicker than in the G35.
But the 0-60 times may be only a tenth quicker – largely due to the requirement of another shift before 60. Looks like even pushing to the fuel cutoff ( if still 8,000 RPM ) would mean a 2-3 shift before 55 MPH.
The same goes for the quarter mile – where the top of third gear was previously right at 103 = very close to the terminal velocity I see reported in various quarter mile tests, the G37 A7 third gear looks to ‘reach’ only to around 85 MPH. Again, I expect that the aggressive gearing will result is quicker acceleration, but perhaps ( since requiring another shift – well before reaching the end of the quarter mile run ) not much difference in reported times.
These are based on roughly the same rolling diameter \ revs per mile on the 2009’s wheel \ tire combinations.
RE – quiet.
I have not driven a G37 Coupe.
My reading leads me to believe that the 3.7L is a somewhat more refined motor than the 3.5L.
This also will likely be somewhat effected by the final drive ratio chosen. The lower ( numerically ) the final drive, the lower the RPM at any given road speed in top gear.
I am personally more interested in the RPM than the noise level – as I expect that Infiniti will manage the noise well enough. I just happen to [ rather strongly, but irrationally ] prefer lower RPM in sustained highway driving at or above 70 MPH.
But that’s just me . . .
- Ray
Waiting.
2 MPG * 19 gal = 38 miles
3 MPG * 19 gal = 57 miles
[ 1 gal = ‘reserve’ ]
My guess, as I have posted above, is that
The G37 Sedan w/A7 will reportedly post 2 MPG higher
in the EPA highway # and seems likely at least that
much higher in actual highway style cruising.
To me, 2 or 3 MPG means:
A – 10% or so less fuel expense in much of my driving.
B – approx. 38 to 57 additional miles per tank \ range
C – Another small decrement in my personal carbon
and fossil fuel use. . .
I do understand that 2 or 3 MPG mean little to some people, even now.
RE - ‘a tenth or two’:
Speculation remains rampant regarding any difference in acceleration between the G35 Sedan w/A5 and the G37 Sedan w/A7.
[ sigh ]
Quicker is better – to me.
I have been somewhat ( ahem ) spoiled by driving over 30,000 miles in a rather quick car. [ Corvette ]
A few ‘back of the envelope’ calculations suggest to me that, with the 3.36 final drive & the gearing of the new A7:
The ‘rate’ of acceleration to 60 will likely be noticeably quicker than in the G35.
But the 0-60 times may be only a tenth quicker – largely due to the requirement of another shift before 60. Looks like even pushing to the fuel cutoff ( if still 8,000 RPM ) would mean a 2-3 shift before 55 MPH.
The same goes for the quarter mile – where the top of third gear was previously right at 103 = very close to the terminal velocity I see reported in various quarter mile tests, the G37 A7 third gear looks to ‘reach’ only to around 85 MPH. Again, I expect that the aggressive gearing will result is quicker acceleration, but perhaps ( since requiring another shift – well before reaching the end of the quarter mile run ) not much difference in reported times.
These are based on roughly the same rolling diameter \ revs per mile on the 2009’s wheel \ tire combinations.
RE – quiet.
I have not driven a G37 Coupe.
My reading leads me to believe that the 3.7L is a somewhat more refined motor than the 3.5L.
This also will likely be somewhat effected by the final drive ratio chosen. The lower ( numerically ) the final drive, the lower the RPM at any given road speed in top gear.
I am personally more interested in the RPM than the noise level – as I expect that Infiniti will manage the noise well enough. I just happen to [ rather strongly, but irrationally ] prefer lower RPM in sustained highway driving at or above 70 MPH.
But that’s just me . . .
- Ray
Waiting.
2 MPG * 19 gal = 38 miles
3 MPG * 19 gal = 57 miles
[ 1 gal = ‘reserve’ ]
#29