My 08 stock TT has a squirrelly feel when I make a sharp turn at moderate speed and I begin to accelerate. This occurs in either normal suspension mode or with the sport setting on. I have a limited slip rear and I do not see any indication in the dash that the PASM has been activated. Any thoughts?

 

What are your tire pressures? Also have your alignment checked, these cars are all over the place from the factory. You can get Porsche to check the alignment and re-adjust as needed within the first 3000 miles for free.

 

First rear engined car? Even with my suspension and alignment upgrades the Porsche feel sure is different from a BMW M car or Evo for example, takes some getting used to i.e. driving event / teaching.

Stock TT suspension is garbage though, replace it or at the very least get a good alignment.

 

I wouldn't make any determinations based on driving in this weather with summer tires.

 

Are you talking about snap oversteer when jumping on the accelerator out of the corner?

 

Yeh, I took out all my track setup cambers for winter and still anything under about 10 deg C is VERY jittery with summer tyres on.

Only now it's climbed above 12 deg C here in the UK am I starting to get a more secure footing.

 

maybe it's the stock rubber bushings? there can be some play there that causes that mushy feeling.

also could be uneven road surface. awd and hard sidewalls make these cars wander a lot imo

 

Stock suspension on the tt horrible. That rear twitch is normal. You will feel it even more if this is your first rear engine car.

You need some coilovers, sways, toe links, good corner weighting, good alignment, and proper rebound/compression settings. That will solve your twitch! Uh oh.. Let the modding begin.

 

I am only an amateur, so these are just my opinions and hope to help:

As already pointed out, all bets are off if road is wet and tires cold.

Squirrelly front or back tires? Entering or exiting corner?

Front: Tire pressure check as already mentioned -- it could be too soft. It's also possible you need more front negative camber if the outside front tire feels like it's rolling on itself, particularly on off-camber corners. BTW, more front negative camber is what a lot of us do and is a no brainer recommendation regardless of whether or not you feel the squirrels .

Rear entering & mid corner: Lift throttle oversteer. This is not fun. Remember slow in fast out always!

Rear exiting corner: (Slightly out of) controlled throttle oversteer. This is fun, but maybe not-so-fast out?

Rear throughout the corner: Welcome to 911 .

 

I love your car, did you go from stock to your existing suspension set up? If so, how does the PASM handle everything?
I am looking to make some changes, but I need to maintain my drivability. I really am not looking for a track set up that gets by on the street. The roads in Chicago aren't exactly what I would call passable for streets

 

This is the suspension setup for my car. It really is a bit more than necessary for street use.

JRZ RS coilovers with Hyper Coil main and helper springs
JRZ adjustable camber plates
TRG drop links
Tarrett toe links
RSS sways front and rear
Coming soon Tarrett dog bones.

Ride quality is stiff, but not too bad. I'm used to stiff rides. The PASM button is not functional. Bilstein PSS10 is the only setup I know of that can retain the PASM functionality.

I think for what you are looking for, the PSS10 with new sways would be a good choice. New drop links and toe links really help out as well. If you are willing to live without the PASM function, I think the KW V3 is a great choice as well.

Just keep in mind, the quality of the install, corner balance, and alignment are just as important. Make sure you have a shop with extensive suspension do your setup. It made a huge difference for me.

 

Actually this is my third rear drive porsche. First was a 930 that I did work on and spent a lot of time with track events. Also took a lot of Skip Barber courses including the advanced Formula Ford courses and lap days etc. Recently had a 993 Turbo, also four wheel drive. My car currently has winter tires on it and they were mounted by a very reputable Porsche Club authorized tire dealer.
I certainly should have the alignment checked. The tire pressure with a manual guage is according to factory specs.
The problem occurs when I am exiting a corner at around 50 mph or greater and begin accelerating. The rear feels initially like it will begin to oversteer with the outside tire compressing then it rebounds and loads the inside tire which compresses and then seems to bounce back onto the outside tire.

 

Maybe it's just the winter tires themselves not 'up to the task' so to speak. I know mine ain't all that good for dry performance driving, let alone a track day.
My car does nothing like that on the track even when my suspension was stock w/ street tires the only variable in your car has got to be the snow tires.
GL, see ya at the track this year!