Quote:
Originally Posted by rbpeirce
I don't know why I didn't think of this forum earlier. Driving a Cayman I went to the Cayman Register first, but this is really a more general track issue and I've found members of this group to be very well informed.
I run PS4S on a Cayman and this year managed to cord the edges (after 13 track days) while I still had a lot of tread in the middle. Attached are photos of the left side pair and the right side pair. I try to run at about 35-37# hot which works well.
I'm not sure why. Pushing too hard is one possibility. Someone suggested I needed more sidewall stiffness but I always though the PS4S were fairly stiff; maybe I'm wrong. If so, I could use suggestions. A third possibility is this is just normal; tires and pads are consumables  . Anyhow, I am looking for comments, ideas, suggestions. |
It's hard to tell for sure from the tiny pics you posted, but it looks like you trashed the outside edges of your tires. On that assumption:
As pointed out earlier, this is primarily due to a lack of sufficient negative camber. However, putting in enough camber to prevent this will make the car far less pleasant to drive on the street and could be rather $$$ by the time you buy & install all the parts needed to get that camber.
A way to mitigate the wear you experienced is to upgrade your sway bars. IMO, upgrading sway bars is the most cost-effective suspension improvement you can make to a 987 (either gen). I did it to both of my past 987s, one of which was an R, and it greatly reduces the outside-edge wear without affecting ride quality too much. I've recommended this to other people as well, and they also saw improvement in outside-edge life.