Notices
993 Forum 1995-1998
Sponsored by:
Sponsored by:

Car feels unstable

Thread Tools
 
Search this Thread
 
Old 09-05-2006, 08:33 PM
  #16  
TomF
RL Community Team
Rennlist Member
 
TomF's Avatar
 
Join Date: Apr 2002
Location: Seattle
Posts: 3,740
Received 151 Likes on 130 Posts
Default

Nice car! Welcome to Renlist.

Unfortunately, one cannot compare the steering on the 74-89 cars to the 993's- totally different animals. The steering on my 87 cab was crisp and precise, while the 993 has less feel and is a bit vague.

Check your alignment. An agressive alignment can be a handful on bad roads. BTW, the tire pressure suggestion is an excellent one.
Old 09-05-2006, 11:21 PM
  #17  
Stephen Fisher
Instructor
 
Stephen Fisher's Avatar
 
Join Date: Jun 2004
Posts: 156
Likes: 0
Received 0 Likes on 0 Posts
Default

I saw that car listed on e-bay when it was for sale. That sounds like an awsome car. Peter is amazing and setting up cars for the track and your car was certainly set up for the track.

A good track allignment and suspension will feel twitchy on the street, especially over bumps (spring rates are too stiff for bumpy roads). If you are not a track enthusiest, you should probably look into less agressive suspension options (at a minimum, you should get the car alligned with less camber in front).

Good luck and nice car.

SF
Old 09-06-2006, 11:50 AM
  #18  
993c2cab
Rennlist Member
 
993c2cab's Avatar
 
Join Date: Feb 2006
Location: brighton Michigan
Posts: 1,610
Received 1 Like on 1 Post
Default

Maybe you need to put the engine cover tray back on.
Old 09-06-2006, 11:54 AM
  #19  
John H
Addict
Rennlist Member

 
John H's Avatar
 
Join Date: Jun 2001
Location: Portsmouth, Ohio
Posts: 5,119
Received 68 Likes on 48 Posts
Default

Check your tires for wear and the correct pressures. My car does the same thing when the rear tires get too worn, like they are right now.
Old 09-06-2006, 01:49 PM
  #20  
rkass
Racer
 
rkass's Avatar
 
Join Date: Sep 2004
Location: RI
Posts: 287
Likes: 0
Received 0 Likes on 0 Posts
Default

also look at power steering fluid (assume no leaks in rack). Solved a darty feeling only at speed that way as mine was low.
Old 09-06-2006, 02:31 PM
  #21  
911addict
Three Wheelin'
 
911addict's Avatar
 
Join Date: Apr 2006
Location: London, England
Posts: 1,977
Likes: 0
Received 0 Likes on 0 Posts
Default

Very helpful thread.
My 965 has never felt stable, whereas my 3.2 carrera was rock solid. Alignment check, here I come.
Old 09-06-2006, 04:18 PM
  #22  
911CabSteve
Rennlist Member
 
911CabSteve's Avatar
 
Join Date: Apr 2002
Location: Laguna Niguel, CA
Posts: 325
Likes: 0
Received 0 Likes on 0 Posts
Default

Lowering can have a dramatic affect in the "bump-steer" or Kinematic toe handling characteristics of the car. Does the car get twitchy transitioning over bumps or when the suspension is compressed/unweighted? This would indicate a needed Kinematic toe adjustment..

As others have suggested, I would reccommend going to a specialty Porsche alignment shop and have the alignment, including Kinematic toe checked and adjusted properly for your ride height.. Note that a lot of shops do not know how to adjust the Kinematic toe properly.. It is not easy to do.. This suspension adjustment disappeared when the 996 was introduced, so some dealers don't even have wrenches that still know how to do it..
Old 09-06-2006, 08:23 PM
  #23  
AndyT
Three Wheelin'
 
AndyT's Avatar
 
Join Date: Aug 2004
Location: NJ
Posts: 1,427
Likes: 0
Received 1 Like on 1 Post
Default

95 cars had different geometry than any other year. if you think about tracking the car read up on the differences that porsche made and kind of kept quiet. check the pca.org technicals



Quick Reply: Car feels unstable



All times are GMT -3. The time now is 08:05 AM.