TRAKCAR

40 track days is about 80 hours, or about 6000/7000 track miles give or take.
Savyboy probably has double that.

krisa9977

He is positive on this, but without official documents it doesn't mean anything. Once I have more information I inform you

krisa9977

thank you, that is very important information for me.

savyboy

That would be about exactly correct. 14,000 miles with 11,000 of that being track use.

I nut and bolt my car myself after every event to catch the little things before they become big things. My dealer did the the CL exam and new nut swap. Everything looked/looks fine to the eye.

Unless that threaded hub has metallurgical issues, I am so far good to go.

If the CL mechanism times out with track use WE NEED TO KNOW ABOUT IT PORSCHE

9972RS

do you guys remember that horrific crash in China of the white rs? the doors were ripped off in that crash. I can't find the original post but remember there was an issue with the centerlocks.

my main question is what event or events led Porsche to issue the centerlock recall?

krisa9977

It looks like it is not only CL problem that supposed to be replaced with recall, but also hub problem. If you go over 500nm and hub has more then 3000 miles of track use, it might be broken due to metal fatigue... This is my understanding of this problem.

mdrums

Just perfect Porsche...thanks a lot! So the metal in the hub can't take the torque of the center locks? Porsche this is making your company look very very bad!

The 5 lug wheels torque is 96 ft/lbs per lug nut. Does this add up to 480 ft/lbs of torque on the 5 lug hub?

savyboy

If you have access to the source of this specific information, kindly advise them lives are on the line? This is not an issue to drag out if it is a known problem.

ATL Fahrer

OK, so did I not raise the metallurgy question back in post #33 in this thread? Is this going to take a class action suit to the issue resolved?

There's enough of us here on the forum to get one rolling... (no pun intended )

DJN

It is VERY interesting that the torque for CL nuts is now 444ft.lbs (which also have an additional locking device), while the hubs themselves (CL or 5 lug) are torqued to the stub axles or driveshafts at 340 ft.lbs. This just does not seem right! Thus, 444 ft.lbs must be overkill to make up for sloppy (or more correctly, "potentially" sloppy) owners changing their own wheels.

I had no trouble and a "clean bill of health" at nut recall time, and was torquing by the book to 380 ft.lbs (500 Nm). The trouble began when torquing to 444 ft.lbs (600Nm) when I could barely get the suckers off after a track event (I'm not a weakling! Honest! ).

My 2 cents for the day!

Cheers!
Doug N
2010 GT3 997.2 with 5 lug conversion.......field testing on Sept 1 !!!!

TRAKCAR

Don't you speak to AP every other weekend? He's be a good guy to ask the question, or point out this link of potential metal fatigue nonsense.

Let's leave the lawyers out of it. Nothing good ever comes from that. They will be called into action by next of kin when the wheels start falling off.

9972RS

lawyers? this is all about a cost-benefit analysis. There are so few of us with GT3RS that also track them. So, if they performed a "complete" recall on the centerlocks and fixed it permanently, then it would be way too expensive. They'll take the cost-effective route and deal with the potential lawsuits individually. What's a death here and there? Probably less than it would cost to recall all the centerlock cars, i.e., GT3, GT3RS, GTS, and turbo cars.

mdrums

Trakcar, how many events did you run your CL's at the old torque specs?

My dealer said there is a + or - 10% error for these specs....should you error on the lower or higher side?

Also dealer siad there are new torque specs...higher for 5 lug bolts now....something like 112 ft/lbs and my new GTS owners manual shows higher torque specs for 5 lugs.

TRAKCAR

When did we find out about the new specs?
About 2 days per months starting in May 2010.

911rox

Revised specs for 600nm at track were released mid Sept 2010...