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

Direction drift during sudden throtlle on or off.

Thread Tools
 
Search this Thread
 
Old 04-17-2008, 09:59 AM
  #16  
TrackJunke
Rennlist Member
 
TrackJunke's Avatar
 
Join Date: May 2002
Location: W-S, NC
Posts: 993
Received 41 Likes on 26 Posts
Default

If the tire pressure does not help it could still be the tires. Are they new? I had this problem with a set of michelins. Switch the tires side to side and the direction of pull should be reversed.
Old 04-17-2008, 11:38 AM
  #17  
Edward
Addicted Specialist
Rennlist Member
 
Edward's Avatar
 
Join Date: Jun 2001
Location: So.CA
Posts: 6,117
Received 348 Likes on 196 Posts
Default

Get a good alignment from a shop that KNOWS 993s (warning: since you're new to her, it ain't cheap). Ask them about "Kinematic toe" and that'll tell you whether they have any clue as to how to properly align a 993. What it "sounds" like you're experiencing is the rear end "torquing" when you go on/off the gas. Worn rear suspension bushings (possible, but your mileage/age isn't all that high) and the kinematic toe have much to do with how your rear end behaves as it travels up/down under torque. Given that you've addressed the easy stuff as already mentioned, this is what I'd address.

Edward
Old 04-17-2008, 12:19 PM
  #18  
TAI2
Rennlist Member
 
TAI2's Avatar
 
Join Date: Mar 2004
Location: Chadds Ford, PA
Posts: 1,324
Likes: 0
Received 2 Likes on 2 Posts
Default

No affiliation but two good shops I have experince with are Shade Tree in Morristown and Farnbacher in Danbury Ct. I just had mine done this week at Shade Tree and I could not be happier. Shade Tree has been around for 40 years working on Posches and most anything coming out of Europe. Farnbacher is more expensive and a bit of adrive, but they have the latest Hunter machine which is really slick and great mechanics who really know 911's (they work on every version of 911's and race/sponsor cars - they won the GT2 class in 2006).
Old 04-17-2008, 04:14 PM
  #19  
NoSubEDU
Burning Brakes
 
NoSubEDU's Avatar
 
Join Date: Apr 2005
Location: Raleigh, NC
Posts: 1,015
Received 19 Likes on 7 Posts
Default

I know this is going to sound crazy, but I've noticed the car pull from side to side due to torque on both the GT3 and 993TT. But haven't experienced it with the c2s.
Old 04-19-2008, 12:06 AM
  #20  
Falcondrivr
Race Car
 
Falcondrivr's Avatar
 
Join Date: Apr 2007
Location: Tampa, FL
Posts: 3,930
Received 70 Likes on 36 Posts
Default

Update???? Was it the tires (tyres, for those over there?)
Old 04-19-2008, 11:43 AM
  #21  
Q
Addict
Lifetime Rennlist
Member
 
Q's Avatar
 
Join Date: Jun 2001
Location: Australia. >>> Now in Gibraltar
Posts: 1,398
Likes: 0
Received 2 Likes on 2 Posts
Default

Originally Posted by NoSubEDU
'68 911S | '97 C2S | '97 993TT | '07 GT3
i LOVE your choice of porsches....PERFECT !
Old 04-19-2008, 04:48 PM
  #22  
fnckr
Rennlist Member
Thread Starter
 
fnckr's Avatar
 
Join Date: Feb 2008
Location: Boonton Township, NJ
Posts: 760
Received 199 Likes on 118 Posts
Default

Originally Posted by Falcondrivr
Update???? Was it the tires (tyres, for those over there?)
Yes, three of the tires were at a cold pressure of 30 psi. The driver's rear was at 23 psi.

On the way to the gas station I could still feel the drift. After filling the tire to match the others the car drove beautifully and inspired my post about naming her "Jessica." Herehttps://rennlist.com/forums/993-forum/424528-i-gave-up-motorcycling-for-this-and-now-she-has-a-name.html
Old 04-19-2008, 06:02 PM
  #23  
Falcondrivr
Race Car
 
Falcondrivr's Avatar
 
Join Date: Apr 2007
Location: Tampa, FL
Posts: 3,930
Received 70 Likes on 36 Posts
Default

Ahh! So it was that feeling after you thought; "Oh crap, Jessica is going to cost me a butt-load of time and money after tonight." and the, the next morning you were like; "Woooo! I can't believe I got out of that **** for free!!! man I LOVE her!"
Old 04-20-2008, 12:55 AM
  #24  
Edward
Addicted Specialist
Rennlist Member
 
Edward's Avatar
 
Join Date: Jun 2001
Location: So.CA
Posts: 6,117
Received 348 Likes on 196 Posts
Default

Glad it was the cheap fix

Edward
Old 04-20-2008, 01:11 AM
  #25  
JeremyPutnam
Advanced
 
JeremyPutnam's Avatar
 
Join Date: Dec 2006
Location: Pacific Northwest
Posts: 53
Likes: 0
Received 0 Likes on 0 Posts
Default

Originally Posted by Falcondrivr
Ahh! So it was that feeling after you thought; "Oh crap, Jessica is going to cost me a butt-load of time and money after tonight." and the, the next morning you were like; "Woooo! I can't believe I got out of that **** for free!!! man I LOVE her!"
That's funny. I was thinking something along the lines of "Once I put the hose to her she toed the line..." Sorry, couldn't help myself. I did love the Jessica story, btw.



Quick Reply: Direction drift during sudden throtlle on or off.



All times are GMT -3. The time now is 01:33 AM.