S2000 Talk Discussions related to the S2000, its ownership and enthusiasm for it.

Another discussion of launching

Thread Tools
 
Old 01-10-2007, 06:54 AM
  #1  
Registered User

Thread Starter
 
chino101's Avatar
 
Join Date: Dec 2006
Location: Bethesda, MD
Posts: 818
Likes: 0
Received 0 Likes on 0 Posts
Default Another discussion of launching

Having recently purchased my S2000, I have been doing a lot of research on this forum about the joys of owning it. One suggestion that I see over and over again, is that when performing a hard launch, it is best to keep the wheel spinning so that a) you don't kill the clutch since the tires are burning and not the clutch , and b) so there is less impact loading or "shock" transmitted to the drive train, especially the rear differential. I'm most interested in "b)", so here is my question.

Since the rear tires of the car still has to overcome the forces of static friction to achieve wheel spin, isn't there the still the same amount of impact load being applied to the rear differential with or without spinning the tires? Anything else that I'm not seeing here?
Old 01-10-2007, 08:11 AM
  #2  
Registered User

 
SIIK2NR's Avatar
 
Join Date: Jul 2004
Location: San Diego, Wess-Side!!
Posts: 8,796
Likes: 0
Received 2 Likes on 2 Posts
Default

Originally Posted by chino101,Jan 10 2007, 07:54 AM
isn't there the still the same amount of impact load being applied to the rear differential with or without spinning the tires?
Until you understand why this statement is wrong.... please stop launching your car.


JMO

Old 01-10-2007, 08:33 AM
  #3  
Registered User

 
chuhsi's Avatar
 
Join Date: Jan 2006
Location: San Francisco
Posts: 6,412
Likes: 0
Received 4 Likes on 4 Posts
Default

Wow.

I guess you could say the same amount of force is going to your rear diff whether you spin the tires or not. That's not the problem. The problem is where that force goes. It'll either hit your diff or be spun out through your tires. You want the second option.
Old 01-10-2007, 09:42 AM
  #4  
Registered User

 
shotiable's Avatar
 
Join Date: Apr 2006
Location: sunny suisun
Posts: 5,539
Likes: 0
Received 3 Likes on 3 Posts
Default

i thought CDV stopped us from doing fun stuff like great launches....
Old 01-10-2007, 10:09 AM
  #5  
Registered User
 
neveronlines2k's Avatar
 
Join Date: Nov 2005
Location: Orange County CA
Posts: 5,749
Likes: 0
Received 0 Likes on 0 Posts
Default

Thats why we remove it
Old 01-10-2007, 10:24 AM
  #6  

 
KnowledgeIsPower's Avatar
 
Join Date: Jul 2006
Posts: 2,096
Likes: 0
Received 0 Likes on 0 Posts
Default

or just have an AP1

step one: rev to 6k
step two: smile
step three: side step clutch
step four:
Old 01-10-2007, 12:00 PM
  #7  
Registered User

Thread Starter
 
chino101's Avatar
 
Join Date: Dec 2006
Location: Bethesda, MD
Posts: 818
Likes: 0
Received 0 Likes on 0 Posts
Default

Originally Posted by SIIK2NR,Jan 10 2007, 09:11 AM
Until you understand why this statement is wrong.... please stop launching your car.


JMO
Have yet to do a hard launch in my car, which is my daily driver, and don't plan to. My train of though was that enough force still has to be applied to the rear tires to exceed the static friction force to cause them to spin. Once the tires are spinning it takes less force to keep them spinning; transition from static to kinetic friction.

Although I can start to see that the difference here is that an impact load that is applied to the wheels such that a spin is impending has a longer duration, verses one that cause the wheel to spin almost instantaneously.
Old 01-10-2007, 01:57 PM
  #8  
Registered User

 
03S2kStud's Avatar
 
Join Date: Aug 2005
Location: Jacksonville, FL
Posts: 318
Likes: 0
Received 0 Likes on 0 Posts
Default

KnowledgeIsPower, nice!!! =)

Shotiable, CDV only applies to AP2's, as previously stated!
Old 01-10-2007, 04:51 PM
  #9  
Registered User
 
s2k_jay's Avatar
 
Join Date: Jun 2006
Posts: 242
Likes: 0
Received 0 Likes on 0 Posts
Default

you can still kinda drop the clutch on an ap2..put just gotta ride it for a sec..and let off real fast..boom there u go..no need to remove the cdv
Old 01-10-2007, 07:06 PM
  #10  
Registered User

 
afwfjustin's Avatar
 
Join Date: Mar 2005
Location: Seattle, WA
Posts: 5,423
Likes: 0
Received 1 Like on 1 Post
Default

Why don't AP2 drivers convert to the AP1 clutch delay valve? Everyone in my local club does it. If I had an ap2 it'd be the first thing I did


Quick Reply: Another discussion of launching



All times are GMT -8. The time now is 12:17 AM.