Rennolazine

tgavem

Summer tires and winter/all-season tires have much different compounds. Summer tires should not be used below 40-45deg. Summer tires compound get harder with decreasing temperature and could reach its glass transition temperature around 35-40deg. Ie, rubber changes so when temperature increases again, it wont soften and tire is ruined. One reason you see people in the south slide all over the place when temperature drops below 32, like Bambi on ice.

Winter tires gets softer with decreasing temperature and has wider grooves for better traction. If you plan to drive in cold temperature, best thing to have a another set of tires.
It is hard in Houston because we only drop below freezing about 10 times per year and only for a few hours. Not a reason too buy winter tires, so those days keep car in garage and wait for warmer temps.
tire rack has a good write up on this

BlackOptic

GT Silver on the outside.... T interior

Copperhead37

Ukkid74

Wing Commander

Copperhead37

Ukkid74

AlpineR

Apollo Falcon

Hey T peeps,

Wanted to shoot this back out there and see if you had any experience driving the different settings of PSM (the little "traction off" looking button on center console):

PSM Off (hold button for 2 seconds)
PSM Sport (restricted) (press button quickly)
PSM On

I get that "normal" driving you want PSM to give you full stability, like if I'm going to work on my commute. I get that PSM fully off is good for sliding around on a course (and drifting?). When and where would all of you use PSM Sport (restricted)? Again, I'm new to Porsche and the 911. I've either had no stability in a sports car or the option to fully turn it off. I don't understand this restricted approach. Any experienced drivers out there who drive around all day in PSM Sport?

Thanks!

alex_c

You can use PSM Sport to allow up to 15 degrees of drift before PSM intervenes to correct the course. This is a great mode for track use without going all-out with PSM off, which has no safety net. If you rear is already sliding 15 degrees, you better hope you left PSM Sport ON.

Ukkid74

Apollo Falcon

Awesome! Thanks for the response. That helps and makes sense. I guess thats why the engineers have you hold the button for 2 seconds to completely turn it off instead of the tap. Seems like you should know what the F you are doing with PSM off. I feel like I should really get some hands on education for 911 specific aggressive driving before I push her too hard.

Know of any 911 specific courses/instructors that can teach me how to push my T? I live in Texas so I'm quite far from a Porsche Experience center.

Thanks everyone this is turning into a nice little community here.

My wife thinks I spend more time with the T than with her...she might be right

tgavem

mpwww