Another noobie question here. I noticed that when I'm at or near a full stop and turn the wheel to near the stopping point in either direction (i.e. to do a U-turn or coming out of a tight parking space) and then give it a little gas, there is a gentle skid I feel through the steering wheel that feels like the front tires are skidding forward rather than rolling. It only happens at slow speeds (1-3 mph). On hairpin turns on twisty canyon roads, for example, turning the wheel almost the same amount going 10-15mph is okay. Is this normal? Wheels are the factory S wheels with the original P-zero tires with about 10/32nds left.

 

It's normal. Do a search for "acorns" and you will find plenty of posts on this.

 

Thanks Brad! Apparently it's called the Ackerman effect for anyone that had no clue (including myself) and does appear to be normal (though still disconcerting).

 

https://rennlist.com/forums/991/8949...om-lexvan.html


https://rennlist.com/forums/991/7861...reverse-2.html

 

Just learned this myself!

 

Porsche should probably instruct all of their sales folks to bring this up with all prospective customers (actually any vehicle with wide low profile tires) since it is very disconcerting the first time you experience it.....

 

It did it on my 997s, too, but it is even more pronounced on my 991s.

Even worse on the Cayman race car, especially on cold mornings.

 

I've noticed it the past few weeks as our Central California temperatures have dipped down into the 30's. Not so much when the tires are warmer.

 

Our C4s is our third Porsxhe in 20 months. The Boxster S and the C2s both exhibited the Ackerman effect but in the C4s it seems to be much more pronounced. (With both the BS and C2s the effect was lessened when I switched to Michelin Pilot Super Sports.)

Does anyone else have experience with both 991 models and if so did you make the same observation that the C4s was "worse"?