Motorsports / Track Th ultimate forum to discuss motorsports / track related topics for your G37.

Techniques for launching?

Thread Tools
 
Search this Thread
 
Old 07-22-2009, 12:07 PM
  #16  
Alex57r
Registered User
 
Alex57r's Avatar
 
Join Date: Apr 2009
Location: NYC
Posts: 523
Likes: 0
Received 1 Like on 1 Post
Originally Posted by ozzypriest
Thank you there were some actual useful answers form some of you. And yes, that is correct, Alex57r, thank you - if I wanted a 6mt I would have bought a 6mt. Apparently most g37 owners don't spend a lot of time at the dragstrip because if they did, they would know that the fastest cars all have AT's; historically, various and sundry 4-speed ATs populate the 9 and 8 second vehicles. And for the record, the 7AT sedan is faster than the 6MT coupe - go and read C&D, Motor Trend, or any number of other car rags. You can find the articles using the search function.
I don't know if I necessarily beleive the magazines, but when I test drove a manual coupe I thought to myself, if that's all this car has got, I'd rather just have an auto. I live in NYC and even though a stick is much more fun to tdrive, there is always traffic here. To be honest I beleive that a pro can drive a stick faster than even a 7at, but in the real world, this will never happen. I remember when I had a maxima 5MT (2000) it was a whole second faster 0-60 in stick than in automatic, but nowaday, a couple of tenths? eeh, who cares?

One thing for sure, in those videos, launching techniques make a difference on a AWD car. As long as there is no wheelspin, the sooner its in the powerband the faster your time. How much difference? eeh.... Its still a heavy car...
Old 07-22-2009, 12:15 PM
  #17  
G37MA
Registered User
 
G37MA's Avatar
 
Join Date: Aug 2007
Posts: 233
Likes: 0
Received 0 Likes on 0 Posts
I went from a 6MT s to a 7ATX and I can say that the auto does feel faster.
Old 07-22-2009, 12:20 PM
  #18  
Alex57r
Registered User
 
Alex57r's Avatar
 
Join Date: Apr 2009
Location: NYC
Posts: 523
Likes: 0
Received 1 Like on 1 Post
It would be interesting to see a 6MT coupe vs a 7at AWD X sedan race head to head under the same conditions...
Old 07-22-2009, 02:51 PM
  #19  
G37-6MT
Registered User
 
G37-6MT's Avatar
 
Join Date: Jul 2009
Location: Chicago Suburbs
Posts: 66
Likes: 0
Received 0 Likes on 0 Posts
Originally Posted by Alex57r
One thing for sure, in those videos, launching techniques make a difference on a AWD car. As long as there is no wheelspin, the sooner its in the powerband the faster your time. How much difference? eeh.... Its still a heavy car...
Actually, some wheelspin of the line helps the car get into the powerband immediately. When I drag raced my Mustangs, my best 60ft. times came with the perfect blend of wheelspin and riding the clutch. If I just dumped the clutch off the line, the car would bog or have too much wheelspin.

Watch the 1/4 mi launch of the G37 on this clip: http://www.youtube.com/watch?v=uuri5zIqbTw

If wheelspin didn't help, they would avoid it.
Old 07-22-2009, 07:03 PM
  #20  
Mike
Registered User
iTrader: (1)
 
Mike's Avatar
 
Join Date: Feb 2008
Posts: 4,549
Likes: 0
Received 20 Likes on 11 Posts
Wheelspin gets your engine further into its powerband, but you're not putting the power to the ground. It's being wasted in the form of wheelspin.

Remember, Static friction > kinetic friction.

You want to put enough power down, that you're putting more to the ground than the threshold to maintain kinetic friction, but not enough to break static friction.

Ideally, you want to be right under static friction cap.
Old 07-22-2009, 07:41 PM
  #21  
chasemyaccord
Registered User
iTrader: (2)
 
chasemyaccord's Avatar
 
Join Date: May 2005
Location: Irvine, CA
Posts: 2,621
Likes: 0
Received 3 Likes on 3 Posts
Mike = rocket scientist
Old 07-22-2009, 07:52 PM
  #22  
Gamedog
Sam Rothstein
iTrader: (9)
 
Gamedog's Avatar
 
Join Date: Feb 2008
Location: Riverside/San Diego, CA
Posts: 10,435
Likes: 0
Received 8 Likes on 8 Posts
Don't give Mike the credit, I read all that on the back of my box of Cheerios this morning.

Plagiarism FTL.

Old 07-22-2009, 08:00 PM
  #23  
G37Sam
Administrator
 
G37Sam's Avatar
 
Join Date: Aug 2008
Location: Doha, Qatar
Posts: 12,184
Received 243 Likes on 193 Posts
Mike =

Old 07-23-2009, 12:21 AM
  #24  
bunluvsvw
Registered User
iTrader: (1)
 
bunluvsvw's Avatar
 
Join Date: Aug 2008
Location: NE Philly
Posts: 560
Likes: 0
Received 0 Likes on 0 Posts
My 08 G37 coupe with 5at did a 13.6@ 102mph. The best thing to do is to leave it on DS mode and floor it. At the light, I did step on both the brake and the gas and kept the rev at around 1600-1800 rpm. Once the light turned green, I instantly let go of the brake and the car just takes off. Oh I forgot to mention I was running on 20s so I think its not a bad time. I sold the G and got a IsF and took it to the track. My IsF is doing a flat 13.0 @ 111mph so I know im having traction problem with it right now. I just gotta keep working at it till I hit a 12.6 i guess my tires are too new and are not sticky enough yet. Not to mention the stock 255s are kinda thin for a 400+ hp car.
Old 07-23-2009, 12:10 PM
  #25  
Mike
Registered User
iTrader: (1)
 
Mike's Avatar
 
Join Date: Feb 2008
Posts: 4,549
Likes: 0
Received 20 Likes on 11 Posts
None of you fools went to college? Oh wait this is high school physics that everyone sleeps through
Old 07-23-2009, 12:47 PM
  #26  
chasemyaccord
Registered User
iTrader: (2)
 
chasemyaccord's Avatar
 
Join Date: May 2005
Location: Irvine, CA
Posts: 2,621
Likes: 0
Received 3 Likes on 3 Posts
Haha, I loved high school physics. I actually passed the AP test on that one Too bad I don't remember squat anymore....well a few things here and there...centripetal force = (mv^2)/r...hahahaha
Old 07-23-2009, 12:51 PM
  #27  
shumby
Registered User
iTrader: (3)
 
shumby's Avatar
 
Join Date: Sep 2007
Location: With your mom
Posts: 2,668
Likes: 0
Received 5 Likes on 5 Posts
lol i got a 92 on my AP physics exam
Old 07-23-2009, 02:36 PM
  #28  
Alex57r
Registered User
 
Alex57r's Avatar
 
Join Date: Apr 2009
Location: NYC
Posts: 523
Likes: 0
Received 1 Like on 1 Post
I went ... to.... wait, what were we talking about again...?

Oh well..
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Digilog
Engine, Drivetrain & Forced-Induction
4
08-17-2015 03:54 PM
S6MT
Engine, Drivetrain & Forced-Induction
4
01-29-2008 11:14 PM



Quick Reply: Techniques for launching?



All times are GMT -4. The time now is 03:08 AM.