996 wheel bolts / studs
Exactly why I like to use Porsche parts and other proven hardware. Somewhere between German air for tires and Chinesium metal for lugs is fine for coffee & chamois.
Trick question?
I went with the longer ones for ease of use, work fine with stock and gt2 sized wheels. Added bonus is you can swap wheels very quickly, especially using rear jack points.
I went with the longer ones for ease of use, work fine with stock and gt2 sized wheels. Added bonus is you can swap wheels very quickly, especially using rear jack points.
H&R studs part number 1454005 is what you want Steve. Torque the studs at 32 ft.lb into the hub. Use with Porsche OEM steel lug nuts and torque to 118 ft.lb.
Last edited by pwdrhound; Jul 9, 2016 at 09:52 AM.
I've just kept with 96ftlb.
96 is what's in the manual but it's a carryover from the old Porsche days when the cars used press in studs and aluminum lug nuts. As a matter of fact, all 991 cars call for 118 and they have the same sized 14x1.5 lug bolts. For street use 96 is fine but I found that at 96 I would need to retorque my wheels after every track session. At 118 I no longer need to do that. I torque them once and I'm set. I've also never broken a stud at 118 while I have seen and read about guys breaking them at 96. I think what happening is that at 96 the load on the wheel is allowing a certain amount of flex to be transferred to the stud which eventually fatigues and cracks, sort of like a paper clip that fails when flexed back and forth. At 118, flex is minimized if not all but eliminated. We use 118 on all of our race cars which use studs and I recommend 118 even with OEM lug bolts.
Last edited by pwdrhound; Jul 9, 2016 at 09:52 AM.
no legit question. depending on who makes them i have seen at least 3 different lengths of studs. i dont mind seeing the end of the stud but dont want it sticking out of the wheel a 1/2" if not needed
pwdrhound, always making our lives easier with part numbers. Always very much appreciated
BTW, do you have a part number handy for the OEM lug nuts? Also just curious, what Porsche application(s) are they normally from?
Thanks 'hound!!
BTW, do you have a part number handy for the OEM lug nuts? Also just curious, what Porsche application(s) are they normally from?Thanks 'hound!!
http://www.new-part.com/product/pors...FQqoaQodDy8FKA
I'll measure mine Tuesday night before going to the track Wednesday and post pics with stock, OZ and F14s so people can see the look. I chose mine because they were black with bull nose and proven quality.
96 is what's in the manual but it's a carryover from the old Porsche days when the cars used press in studs and aluminum lug nuts. As a matter of fact, all 991 cars call for 118 and they have the same sized 14x1.5 lug bolts. For street use 96 is fine but I found that at 96 I would need to retorque my wheels after every track session. At 118 I no longer need to do that. I torque them once and I'm set. I've also never broken a stud at 118 while I have seen and read about guys breaking them at 96. I think what happening is that at 96 the load on the wheel is allowing a certain amount of flex to be transferred to the stud which eventually fatigues and cracks, sort of like a paper clip that fails when flexed back and forth. At 118, flex is minimized if not all but eliminated. We use 118 on all of our race cars which use studs and I recommend 118 even with OEM lug bolts.
Switching to 118, thanks John
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