MyG37

Engine, Drivetrain & Forced-Induction
Have Technical Questions or Done Modifications to the G37? Find out the answer in here!

5at Vs 7at

Thread Tools
 
Search this Thread
 
Old 08-21-2008, 03:21 PM
  #16  
nonsensez9
Registered User
 
nonsensez9's Avatar
 
Join Date: Sep 2007
Posts: 27
Likes: 0
Received 0 Likes on 0 Posts
Originally Posted by tfmbigdog99
Faster as in you'll get to second quicker than you will now, because the MPH range in each gear has been decreased. But your not going any faster, if that makes any sense.
I meant the time it takes from the moment the shift is initiated until the shift is complete. for example: from the time that the paddle is tapped until the next gear is engaged.
nonsensez9 is offline  
Reply Like
Old 08-21-2008, 03:25 PM
  #17  
TomG37
Registered User
 
TomG37's Avatar
 
Join Date: Mar 2006
Location: Long Island, NY
Posts: 1,182
Likes: 0
Received 2 Likes on 2 Posts
How does the 7at work, is it 5 drive gears and two OD gears?
TomG37 is offline  
Reply Like
Old 08-21-2008, 07:54 PM
  #18  
Mr_Ryte
Registered User
 
Mr_Ryte's Avatar
 
Join Date: Jul 2002
Location: San Antonio, Tx
Posts: 201
Likes: 0
Received 0 Likes on 0 Posts
Originally Posted by TomG37
How does the 7at work, is it 5 drive gears and two OD gears?
Yup. Knowing Infiniti, most likely they'll use the same 7AT in the new FX so the overdrive gears are 0.86 and 0.77 for 6th and 7th gear respectively.
Mr_Ryte is offline  
Reply Like
Old 08-21-2008, 07:56 PM
  #19  
Mr_Ryte
Registered User
 
Mr_Ryte's Avatar
 
Join Date: Jul 2002
Location: San Antonio, Tx
Posts: 201
Likes: 0
Received 0 Likes on 0 Posts
Originally Posted by LudwigB
Crusing at 80mph will be at around 2700rpm
Where did you get that info?
Mr_Ryte is offline  
Reply Like
Old 08-22-2008, 11:36 AM
  #20  
Achilles
Registered User
 
Achilles's Avatar
 
Join Date: Feb 2008
Posts: 754
Likes: 0
Received 0 Likes on 0 Posts
Originally Posted by LudwigB
Crusing at 80mph will be at around 2700rpm
Again, don't think that is correct. The FX cruises 60mph @ 1960rpm...... Same 7AT the coupe will have.....
Achilles is offline  
Reply Like
Old 08-22-2008, 11:40 AM
  #21  
BHCubed
Registered User
 
BHCubed's Avatar
 
Join Date: Aug 2008
Location: South Jersey
Posts: 90
Likes: 0
Received 0 Likes on 0 Posts
Originally Posted by LudwigB
Crusing at 80mph will be at around 2700rpm
my 08 g37s with 5AT cruises at 3k rpm from 70-80 mph, is that normal?
BHCubed is offline  
Reply Like
Old 08-22-2008, 02:12 PM
  #22  
Stanislav
Registered User
 
Stanislav's Avatar
 
Join Date: Aug 2005
Location: Beverly Hills, CA
Posts: 149
Likes: 0
Received 0 Likes on 0 Posts
Originally Posted by BHCubed
my 08 g37s with 5AT cruises at 3k rpm from 70-80 mph, is that normal?
Yeah, thats normal. I cruise a little bit more than 3K rpm when I'm at 80. I wish it would have been in the low 2's range, oh well....
Stanislav is offline  
Reply Like
Old 08-22-2008, 02:44 PM
  #23  
Achilles
Registered User
 
Achilles's Avatar
 
Join Date: Feb 2008
Posts: 754
Likes: 0
Received 0 Likes on 0 Posts
Originally Posted by Stanislav
Yeah, thats normal. I cruise a little bit more than 3K rpm when I'm at 80. I wish it would have been in the low 2's range, oh well....
The '09 will have a better cruise rpm.........
Achilles is offline  
Reply Like
Old 08-22-2008, 03:09 PM
  #24  
BHCubed
Registered User
 
BHCubed's Avatar
 
Join Date: Aug 2008
Location: South Jersey
Posts: 90
Likes: 0
Received 0 Likes on 0 Posts
Originally Posted by Stanislav
Yeah, thats normal. I cruise a little bit more than 3K rpm when I'm at 80. I wish it would have been in the low 2's range, oh well....
ok, cool. yeah, i thought it seemed a little high, since my previous car a 06 accord 3.0L v6 was around 2500rpm @ 80mph.
BHCubed is offline  
Reply Like
Old 08-22-2008, 08:57 PM
  #25  
nonsensez9
Registered User
 
nonsensez9's Avatar
 
Join Date: Sep 2007
Posts: 27
Likes: 0
Received 0 Likes on 0 Posts
Originally Posted by Achilles
Again, don't think that is correct. The FX cruises 60mph @ 1960rpm...... Same 7AT the coupe will have.....
but does it have the same final drive ratio? That can make significant differences to cruising rpm.
nonsensez9 is offline  
Reply Like
Old 08-23-2008, 12:33 AM
  #26  
Achilles
Registered User
 
Achilles's Avatar
 
Join Date: Feb 2008
Posts: 754
Likes: 0
Received 0 Likes on 0 Posts
Originally Posted by nonsensez9
but does it have the same final drive ratio? That can make significant differences to cruising rpm.
Good point, guess we will not know till next month........
Achilles is offline  
Reply Like
Old 08-23-2008, 12:44 PM
  #27  
sjava
Registered User
 
sjava's Avatar
 
Join Date: Aug 2008
Posts: 7
Likes: 0
Received 0 Likes on 0 Posts
7sp in FX
FX35 with 7sp gained 1mpg in city and highway while the engine gains 28hp. FX50 with 7sp gained 1mpg in city and 3mpg in highway over FX45 while the engine gains 70hp. So the 7sp helps V8 in FX50 more even with more powerful engine.

They won't change the engine for 2009 G37 coupe. I'm hoping the 7sp will help gain about 2mpg. I'm guessing 19 in city and 26 in highway. That will put G37 over 335, IS350 and TL SH-AWD in terms of efficiency. What do you guys think?
sjava is offline  
Reply Like
Old 08-23-2008, 02:17 PM
  #28  
Achilles
Registered User
 
Achilles's Avatar
 
Join Date: Feb 2008
Posts: 754
Likes: 0
Received 0 Likes on 0 Posts
Originally Posted by sjava
FX35 with 7sp gained 1mpg in city and highway while the engine gains 28hp. FX50 with 7sp gained 1mpg in city and 3mpg in highway over FX45 while the engine gains 70hp. So the 7sp helps V8 in FX50 more even with more powerful engine.

They won't change the engine for 2009 G37 coupe. I'm hoping the 7sp will help gain about 2mpg. I'm guessing 19 in city and 26 in highway. That will put G37 over 335, IS350 and TL SH-AWD in terms of efficiency. What do you guys think?
It's possible........... 2mpg is probably the most it will gain... And that's fine with me,,,,,,, I'll take it!!!!!!
Achilles is offline  
Reply Like
Old 08-24-2008, 12:10 AM
  #29  
LudwigB
Registered User
 
LudwigB's Avatar
 
Join Date: Nov 2006
Location: Orange County
Posts: 188
Likes: 0
Received 0 Likes on 0 Posts
Originally Posted by Achilles
Again, don't think that is correct. The FX cruises 60mph @ 1960rpm...... Same 7AT the coupe will have.....
I was just doing a simple math.

60pmh at 1960rpm or 32.66rpm per 1mph. So at 80mph it comes to around 2610rpm. I guess I was rounding up to 2700rpm
LudwigB is offline  
Reply Like
Old 08-24-2008, 03:33 PM
  #30  
Achilles
Registered User
 
Achilles's Avatar
 
Join Date: Feb 2008
Posts: 754
Likes: 0
Received 0 Likes on 0 Posts
Originally Posted by LudwigB
I was just doing a simple math.

60pmh at 1960rpm or 32.66rpm per 1mph. So at 80mph it comes to around 2610rpm. I guess I was rounding up to 2700rpm
It's all good!

Can't wait for next month to hit so that we can know for sure!!!!
Achilles is offline  
Reply Like



Advanced Search
Quick Reply: 5at Vs 7at


Reply Closed Thread Share
Forum Jump

All times are GMT -4. The time now is 05:33 AM.