Notices
Brakes & Suspension 350Z stoppers, coils, shocks/dampers

understeer

Thread Tools
 
Search this Thread
 
Old 12-26-2007, 11:28 AM
  #1  
Z33_kid
Registered User
Thread Starter
iTrader: (1)
 
Z33_kid's Avatar
 
Join Date: Jun 2007
Location: ATL
Posts: 882
Likes: 0
Received 0 Likes on 0 Posts
Default understeer

well its happend to me about twice mainly rainy situations on turns the car has a ton of understeer/ wants to drift lol and my traction control is on what seems to be the case of this ? is it normal ? if i would drop it on coils n have control arms would it happen more ?
Old 12-26-2007, 11:33 AM
  #2  
r_seng
Registered User
iTrader: (9)
 
r_seng's Avatar
 
Join Date: Apr 2007
Location: SoCal 626
Posts: 2,818
Likes: 0
Received 0 Likes on 0 Posts
Default

rain is rain, only thing you can do is too drive carefully.

slow down or you'll be making a "i crashed my Z" thread.
Old 12-26-2007, 11:58 AM
  #3  
dkmura
General & DIY Moderator
MY350Z.COM
Premier MemberSuper Moderator
iTrader: (64)
 
dkmura's Avatar
 
Join Date: May 2002
Location: Aurora, Colorado
Posts: 8,450
Received 1,311 Likes on 910 Posts
Default

Particularly if you're trying to drive fast in the rain, understeer will show when you've met- or exceeded- the traction limit. Nissan engineered it that way to give Z owners a chance to recover control. Think of it this way- if the car oversteered the same way, you'd be back-asswards off the road when you exceeded the limits!
Old 12-26-2007, 12:40 PM
  #4  
davidv
Registered User
iTrader: (2)
 
davidv's Avatar
 
Join Date: Jun 2004
Location: Tucson, AZ
Posts: 42,754
Likes: 0
Received 11 Likes on 11 Posts
Default

Originally Posted by dkmura
Particularly if you're trying to drive fast in the rain, understeer will show when you've met- or exceeded- the traction limit. Nissan engineered it that way to give Z owners a chance to recover control. Think of it this way- if the car oversteered the same way, you'd be back-asswards off the road when you exceeded the limits!
Agree. Essentially this is a racing question. Rain just exaggerates understeer.

You can make alterations, tires for example, or alter your technique. Understeer occurs when the front end is weighted (usually the result of braking) and the front tires are turned past their friction point. You are “plowing” and the direction of the front tires make little difference. The car wants to continue straight.

Avoid understeer by braking early and maintaining mimimum throttle.
Old 12-26-2007, 04:28 PM
  #5  
capnstabn
Registered User
iTrader: (1)
 
capnstabn's Avatar
 
Join Date: Jun 2007
Location: Texas
Posts: 202
Likes: 0
Received 0 Likes on 0 Posts
Default

Its simple. Once you feel the understeer try not to over correct and once the car is sliding straight, hold the clutch down, rev to 5500, drop clutch, scare the **** outa your gf.
Old 12-27-2007, 02:56 PM
  #6  
terrasmak
Super Moderator
MY350Z.COM
Premier MemberSuper Moderator
iTrader: (8)
 
terrasmak's Avatar
 
Join Date: Jan 2007
Location: Sin City
Posts: 28,779
Received 2,333 Likes on 1,681 Posts
Default

Originally Posted by capnstabn
Its simple. Once you feel the understeer try not to over correct and once the car is sliding straight, hold the clutch down, rev to 5500, drop clutch, scare the **** outa your gf.
Then play with oversteer.
Old 12-27-2007, 02:59 PM
  #7  
kspec
Registered User
 
kspec's Avatar
 
Join Date: Nov 2007
Location: OK
Posts: 1,169
Likes: 0
Received 0 Likes on 0 Posts
Default

drive slower. you might be pushing the car too hard

(then do suspension upgrades probably since your driving is too maximum for the Z)
Old 12-30-2007, 05:19 PM
  #8  
Z1 Performance
Former Sponsor
iTrader: (564)
 
Z1 Performance's Avatar
 
Join Date: Feb 2003
Location: Long Island, New York
Posts: 19,266
Likes: 0
Received 5 Likes on 5 Posts
Default

Originally Posted by Z33_kid
well its happend to me about twice mainly rainy situations on turns the car has a ton of understeer/ wants to drift lol and my traction control is on what seems to be the case of this ? is it normal ? if i would drop it on coils n have control arms would it happen more ?
so does it understeer or try to drift? you are describing two things that are 180 degrees apart from one another

the simple answer...make sure your tires are in good shape and just slow down (alot), at least till you can tell the difference between over and understeer
Old 01-01-2008, 05:52 AM
  #9  
Ziggyrama
Registered User
iTrader: (15)
 
Ziggyrama's Avatar
 
Join Date: Apr 2007
Location: Northboro, MA
Posts: 1,069
Likes: 0
Received 1 Like on 1 Post
Default

Originally Posted by Z1 Performance
so does it understeer or try to drift? you are describing two things that are 180 degrees apart from one another

the simple answer...make sure your tires are in good shape and just slow down (alot), at least till you can tell the difference between over and understeer
I was just going to say the same thing

I see lots of people say understeer and describe rear end slide-out which is really closer to oversteer. Understeer happens when the front tires start to loose traction and the car starts to plow through the turn, towards the outside. This is how 99.9% of stock cars handle from factory since it's safe and very predictable for most drivers. I am yet to be able to get the Z to do this. I have never understeered in a Z. As I push the car to the limit through the turn, I found that the Z always looses traction in the rear first and the rear starts to slide out which is closer to what happens when you get oversteer. Sounds like you're starting to drift with the rear end coming to it's traction threshold and that can easily be done in rain. I'd say you need to slow down or improve your traction.

Last edited by Ziggyrama; 01-01-2008 at 05:55 AM.
Old 01-02-2008, 08:42 AM
  #10  
Q45tech
Registered User
 
Q45tech's Avatar
 
Join Date: Oct 2003
Location: Marietta, Georgia
Posts: 984
Likes: 0
Received 0 Likes on 0 Posts
Default

Over/understeer is described as number of excess degrees the steering wheel is turned under a specific speed and [G and body roll - lateral forces].
Under/over doesn't usually occur until the lateral forces exceed 0.6 G's

http://en.wikipedia.org/wiki/Understeer
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
all_bark
Wheels & Tires
6
06-07-2003 07:24 PM
SunsetZ
2003-2009 Nissan 350Z
2
05-30-2003 02:59 PM
Brad4rdHay
Brakes & Suspension
17
03-27-2003 06:57 AM
AndyB
Engine & Drivetrain
5
03-09-2003 07:35 PM
moab355
Engine & Drivetrain
20
01-03-2003 03:30 PM



Quick Reply: understeer



All times are GMT -8. The time now is 01:36 PM.