[DeTomaso] lug nut question

boyd casey boyd411 at gmail.com
Fri Aug 20 23:41:10 EDT 2010


Thanks Mike,
I didn't mean to shout. I sent the message from a not so smart phone with
out a qwerty key board and  I hate using them and when I noticed I had typed
caps I didn't have the energy to retype it, sorry for the lapse in web
etiquette.
Boyd
On Fri, Aug 20, 2010 at 10:34 PM, <MikeLDrew at aol.com> wrote:

>
> In a message dated 8/20/10 19 03 1, boyd411 at gmail.com writes:
>
>
> What is the stock size lug nut on a 73 PANTERA. iF YOU ARE INSTALLING OVER
> SIZE WHEELS WHAT LENGTH STUDS SHOULD YOU USE AND HOW MUCH LENGTH SHOULD BE
> COVERED BY THE LUG NUT?? ALSO WHAT IS THE CORRECT TORQUE FOR LUG NUTS AND
> HOW OFTEN SHOULD THEY BE CHECKED?
>
>
> >>>WHAT?  I CAN'T HEAR YOU!  YOU NEED TO TYPE LOUDER!!!!!!!! :>)
>
> Okay.  Stock studs are M12.  As to the length of the stud required, that
> has nothing to do with the diameter of the wheel, but rather the thickness
> of the center.  The standard rule of thumb is that you want as least as much
> thread engagement as the diameter of the fastener; in this case, a 12mm stud
> wants 12mm of thread engagement at least.  If your new wheels aren't any
> thicker than your old ones, you're in great shape.
>
> You don't want to over-torque them, but neither do you want your wheels
> falling off.  75-80 ft/lbs is a good rule of thumb.  You should check them
> every time you install the wheel on the car. :>)
>
> When you torque a fastener, you're actually stretching it.  If you're going
> to compulsively check it, first you must LOOSEN the fastener slightly, then
> bring it back up to the appropriate value.  If you torque it to the right
> value, then just retorque it, then retorque it again, each time you're
> making it tighter and tighter, stretching the fastener more and more, until
> finally it fails.
>
> I remember many years ago, there was a douchebag Ferrari guy at a track
> event at Laguna Seca, prancing around in his Ferrari logo driving shoes and
> Ferrari logo driving pants and Ferrari logo driving shirt and Ferrari logo
> driver's gloves and Ferrari logo hat, and of course his helmet had a bunch
> of Ferrari logos on it as well.  He made a big, big show of re-torquing the
> lug nuts on his late-model Ferrari (348 I seem to recall) before each and
> every venture onto the track--just by applying the wrench and tightening
> them, without loosening them first.  Oh, he was a Fast Guy all right.
>
> We all rolled our eyes at this clown, and it came as no surprise when
> towards the end of the afternoon, one of his wheels went arrowing off into
> the bushes in turn 9, broken studs scattered all over the track....
>
> Mike



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