Guessing I need an alignment...?

[mountainman]

I automatically get an alignmet every time I get new tires which works out about yearly. I drive hard on twisty mountain roads about 60 percent of the time and my fronts never get like that. An alignmet may be a good idea.

[Homeboy981]

36psi ALL the way AROUND? Isn't it supposed to be 29 in the fronts? …unless you "squared" your setup on all the same rims and tires.

Again, that is for COLD tires pressure AND regular driving. If you are going on the track or going to drive more aggressively adjust the pressure DOWN - as the tires will heat up alot more more at high speed. Don't know pressures for AX, sorry.

I am getting at least TWICE the mileage out of my fronts and I am in the rear. In fact, I am on my 3rd set for the rear, while the fronts look fine.

[Porsche Chick]

Originally Posted by Homeboy981

36psi ALL the way AROUND? Isn't it supposed to be 29 in the fronts? …unless you "squared" your setup on all the same rims and tires.

Again, that is for COLD tires pressure AND regular driving. If you are going on the track or going to drive more aggressively adjust the pressure DOWN - as the tires will heat up alot more more at high speed. Don't know pressures for AX, sorry.

I am getting at least TWICE the mileage out of my fronts and I am in the rear. In fact, I am on my 3rd set for the rear, while the fronts look fine.

I use about 7 lbs over the regular cold pressure.

In the notes for one of our first AX's it said to go to 40 PSI. That seemed like a big jump from my usual 29/31. I was one of the only Boxsters registered, so that made me suspicious. I looked up 911 pressures and 40 would have put them about 7 lbs over normal. Then I did a little digging (some of those racers' websites are pretty funny) and they were recommending going up 7. Long story short (I know, too late for that now) I'm glad I ignored the notes.

[Flavor 987S]

Originally Posted by Porsche Chick

In the notes for one of our first AX's it said to go to 40 PSI.

Maybe it said 40 hot????

[Porsche Chick]

Originally Posted by Flavor 987S

Maybe it said 40 hot????

No. Cold. I checked, since it sounded like a bit much.

The thing was written for the 911's, which have a much higher pressure. They forgot about the Boxsters.

[BYprodriver]

[QUOTE=Homeboy981;340926]36psi ALL the way AROUND? Isn't it supposed to be 29 in the fronts? …unless you "squared" your setup on all the same rims and tires.

Again, that is for COLD tires pressure AND regular driving. If you are going on the track or going to drive more aggressively adjust the pressure DOWN - as the tires will heat up alot more more at high speed. Don't know pressures for AX, sorry.


Porsche specs lower psi in the front tires because there is less weight on the front tires.
If you install larger tires on the front you should reduce psi because the larger tire has a larger volume of air, thus same psi in a larger tire = more air than you had before supporting the same amount of weight. Temporary spare is a good example, smaller tire needs 60psi to properly support the vehicle.

In all situations too much psi is a minor problem, normally only ride comfort is "impacted". Too little psi is always a problem, as every Ford Explorer driver should know!

[Topless]

I agree with this from another website. Scalloped tires usually mean worn or bent suspension or possibly out of balance tires.

"Tire is scalloped:
when the tire is scalloped or cupped across the tread it is usually caused by bad shocks or struts. This can also be caused by out of balance tires. Jounce the front end to see if it oscillates and test drive the vehicle to see if it floats and leans excessively around corners. Bad struts are the number one cause of cupped tires."