S2000 Under The Hood S2000 Technical and Mechanical discussions.

How does the LSD work?

Old Feb 15, 2003 | 03:05 PM
  #1  
Silvery2k2s2k's Avatar
Thread Starter
Registered User
 
Joined: Jan 2003
Posts: 12
Likes: 0
From: NY
Default

This is the reason im asking.

last night my car was stuck in snow. didnt seem to be a lot of snow but yet enough to make me spin.

to try to get out as normally I let out the clutch in first and slightly rev it. my Rpms must've climbed to maybe about 3500 a few times. so then I decided to open my door and noticed that my drivers rear tire wasnt spinning but the passenger rear was. So then I stopped. This time I decided to watch as I let out the clutch, and I saw at first that my drivers rear would start spinning at first as I let out the clutch but then it would stop while the passenger rear still spinning.

Can somebody clarify how the LSD unit work? Or is there something wrong w/ my rear.

I have an 02 and 20,000 miles as a daily driver.

thanks
Reply
Old Feb 15, 2003 | 04:55 PM
  #2  
ntphan's Avatar
Registered User
 
Joined: Jul 2002
Posts: 261
Likes: 0
From: Southern California
Default

I don't know what's going on with your diff. Here is just some info about differential. There are other stuffs you can learn from that website too.

http://auto.howstuffworks.com/differential.htm

Here for LSD (Torsen)
http://auto.howstuffworks.com/differential8.htm
Reply
Old Feb 15, 2003 | 07:23 PM
  #3  
KennyS2K's Avatar
Registered User
 
Joined: Oct 2002
Posts: 186
Likes: 0
From: Cortlandt Manor, New York
Default

your rear sounds fine.

it is a LIMITED slip dif (LSD), not non slip. it is not like locking hubs on a true all wheel drive. it must still have slippage so that you can turn (outside wheel covers more distance).
Reply
Old Feb 15, 2003 | 07:37 PM
  #4  
Silvery2k2s2k's Avatar
Thread Starter
Registered User
 
Joined: Jan 2003
Posts: 12
Likes: 0
From: NY
Default

Originally posted by Kenny'S2K
your rear sounds fine.

it is a LIMITED slip dif (LSD), not non slip. it is not like locking hubs on a true all wheel drive. it must still have slippage so that you can turn (outside wheel covers more distance).
yeah but it wasnt like I was turning, I was at a standstill just basically lighting up my tires on the snow. is that still true for that situation?
Reply
Old Feb 15, 2003 | 08:11 PM
  #5  
xviper's Avatar
 
Joined: Mar 2001
Posts: 37,305
Likes: 18
Default

Do you have snow tires? If not, then it doesn't matter what you do. With neither tire having any traction, your drive wheels can't decide which side to put the power to. If you have snow tires, then there might be something funny with your LSD.
The first winter I had the car, I did an experiment (and I have snow tires). I planted one tire on the dry tire track of the street and the inside tire near the gutter where the snow and ice was still present. I then took off briskly to see if the car would go and indeed it did. Then I turned around and planted the opposite tire on dry and did the same and the car also took off. The LSD worked perfectly as it should.
With snow tires, when you take off in snow, both tires should spin and dig into the snow and propel the car forward. If you go to "Prairie Redliners" forum and find the threads where we had our snow drag races, you'll see in the vids just how effective snow tires are in snow and I think one of the 4 vids (4 separate threads) will even show you the twin "rooster tails" shooting out the back ends of the cars.
Reply
Old Feb 15, 2003 | 09:15 PM
  #6  
sfphinkterMC's Avatar
Registered User
 
Joined: Nov 2001
Posts: 1,557
Likes: 0
From: Hollywood
Default

get a Mugen 2way diff problem solved
Reply
Old Feb 15, 2003 | 09:29 PM
  #7  
imsport's Avatar
Registered User
 
Joined: Dec 2002
Posts: 22
Likes: 0
From: Rosemead
Default

very normal. LSD is for off the corner accel. More understanding if explain in person.
Reply
Old Feb 16, 2003 | 12:25 AM
  #8  
PedalFaster's Avatar
20 Year Member
 
Joined: Mar 2002
Posts: 6,014
Likes: 1
From: Seattle, WA
Default

Torsens don't behave well when one wheel is on an extremely low traction surface -- they effectively act as an open differential in those scenarios. This might have been what happened in your case. Take a look at the left side of the following chart:

http://www.torsen.com/images/Split_coeffic...cient_chart.jpg

Steve
Reply
Old Feb 16, 2003 | 01:19 AM
  #9  
Silvery2k2s2k's Avatar
Thread Starter
Registered User
 
Joined: Jan 2003
Posts: 12
Likes: 0
From: NY
Default

Actually I dont have snow tires, i got the tires that came with the car.

Ok so i see that according to your answers this is normal.

so what happens for example when you do a burn out on dry road.(not that I necessarily wanna destroy my Diff like that) Do both wheels spin?

thanks for all your replies.
Reply
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
newnan-s2k
S2000 Modifications and Parts
6
Dec 1, 2008 08:04 PM
billiardboy904
S2000 Under The Hood
4
May 17, 2008 07:14 AM
s2kride
S2000 Under The Hood
18
May 2, 2007 01:39 PM
guardiase
S2000 Under The Hood
2
Aug 7, 2006 08:22 AM
BerlinaS2K
S2000 Racing and Competition
5
Mar 16, 2003 01:59 PM



All times are GMT -8. The time now is 11:57 PM.