Wheel stud/lug nuts issues: need recommendations - Page 3 - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

stevesnj · 11-01-2017, 10:30 AM

Clean DRY lug nut and stud threads tightened by hand, no impact gun should be used for removal or tightening. Debris, grease, oil, etc. in the lug not and/or the stud WILL affect torque values. The stock rim value is 89 not 90. Could 1ft pound make a difference? Who knows. I use a battery terminal brush and it works fine.

ka-t_240 · 11-01-2017, 10:54 AM

Quote:

Originally Posted by TMF

Thanks for the info man! Glad to hear the Muteki's are still working for you. I think I might try the 949's though since I no longer have a full set of Muteki's and I don't think you can buy singles.

And ARP does have 3 different lengths for studs now. I might just go with the longest ones so I have flexibility to run spacers if needed in the future.

Best make sure the longer studs are SSC legal

TMF · 11-01-2017, 11:28 AM

Quote:

Originally Posted by ka-t_240

Best make sure the longer studs are SSC legal

They are

"Wheel lug studs (e.g., length) and lug nuts may be changed."

TrqlessWonder · 11-01-2017, 12:20 PM

We'll have to disagree, I think, but 200 ft-lbs *is* a hulk smash setting. My 1/2" Dewalt won't drive them to final torque, and that's a good thing in my book. We aren't doing green flag pitstops, so the extra 1 minute that using a breaker bar takes can't be the end of the world.

JohnJuan · 11-01-2017, 01:26 PM

How does anybody feel about using ARP's studs meant for the Evo, since they're 12x1.5 thread instead of 12.1.25? Would they be tougher?

They are super long, though. They're almost 1/2" longer than the long FR-S studs.

Studs: https://www.summitracing.com/parts/arp-100-7717

Specs from the catalog, for comparison:

TMF · 11-01-2017, 01:51 PM

Quote:

Originally Posted by JohnJuan

How does anybody feel about using ARP's studs meant for the Evo, since they're 12x1.5 thread instead of 12.1.25? Would they be tougher?

They are super long, though. They're almost 1/2" longer than the long FR-S studs.

Studs: https://www.summitracing.com/parts/arp-100-7717

Specs from the catalog, for comparison:

They are all rated at 190,000 psi tensile strength, so I'm going to go out on a limb and say, it won't make a bit of difference.

And if they are even longer, that means more threads and more opportunity for you to mess up threads when putting the wheel on.

I'd say stick with the 12x1.25.

dutchman1 · 11-01-2017, 02:05 PM

Quote:

Originally Posted by JohnJuan

How does anybody feel about using ARP's studs meant for the Evo, since they're 12x1.5 thread instead of 12.1.25? Would they be tougher?

Fine thread fasteners are actually stronger than course thread of the same diameter. They can hold more tension without stripping because they have more thread surface area, and they have greater shear strength because the actual diameter of the bolt is larger (the threads are shallower).

JohnJuan · 11-01-2017, 02:20 PM

Quote:

Originally Posted by dutchman1

Fine thread fasteners are actually stronger than course thread of the same diameter. They can hold more tension without stripping because they have more thread surface area, and they have greater shear strength because the actual diameter of the bolt is larger (the threads are shallower).

I thought our issue wasn't that the lugs shear off, but that the threads get worn out or cross-threaded. It seems like the coarser threads would help with that problem.

dutchman1 · 11-01-2017, 02:33 PM

Quote:

Originally Posted by JohnJuan

I thought our issue wasn't that the lugs shear off, but that the threads get worn out or cross-threaded. It seems like the coarser threads would help with that problem.

I suppose coarse thread might help if there was a contamination issue, but you're still less likely to strip or cross thread a lug with fine thread. There are more threads, so each individual thread sees less stress, and they're shallower and thus less likely to roll over.

I know it seems counterintuitive because smaller threads seem more fragile, but that's not the case.

JohnJuan · 11-01-2017, 03:42 PM

Quote:

Originally Posted by dutchman1

I suppose coarse thread might help if there was a contamination issue, but you're still less likely to strip or cross thread a lug with fine thread. There are more threads, so each individual thread sees less stress, and they're shallower and thus less likely to roll over.

I know it seems counterintuitive because smaller threads seem more fragile, but that's not the case.

Thanks!

ka-t_240 · 11-01-2017, 04:11 PM

Quote:

Originally Posted by JohnJuan

I thought our issue wasn't that the lugs shear off, but that the threads get worn out or cross-threaded. It seems like the coarser threads would help with that problem.

Are you buzzing them on with an impact, and not had starting?

What lugs?

Seems to me, cross threading is an install issue vs a parts issue(unless you have shitty parts).

DaWorstPlaya · 11-01-2017, 05:58 PM

I use anti-seize, never snapped a lug after that. Knock on wood.

stevesnj · 11-01-2017, 09:38 PM

Quote:

Originally Posted by DaWorstPlaya

I use anti-seize, never snapped a lug after that. Knock on wood.

Worst thing to use is anti seize.

snoxracer183 · 11-02-2017, 09:31 AM

Quote:

Originally Posted by stevesnj

Worst thing to use is anti seize.

Well it fits his username

JK DaWorst

11-01-2017, 10:30 AM	#29
stevesnj Senior Member Join Date: May 2013 Drives: 2016 FR-S Oceanic Blue Location: Southern NJ Posts: 2,958 Thanks: 2,158 Thanked 1,601 Times in 923 Posts Mentioned: 30 Post(s) Tagged: 2 Thread(s)	Clean DRY lug nut and stud threads tightened by hand, no impact gun should be used for removal or tightening. Debris, grease, oil, etc. in the lug not and/or the stud WILL affect torque values. The stock rim value is 89 not 90. Could 1ft pound make a difference? Who knows. I use a battery terminal brush and it works fine. __________________ My 2016 Build thread TRD Exhaust with custom quad tips, TRD Lowering Springs,TRD Quick shifter,LED;DRL, Projectors, and turn signals. Re-badge, 86 Nanny, WinmaxW2 Pads, K&N Drop In, Antenna delete

11-01-2017, 12:20 PM	#32
TrqlessWonder Senior Member Join Date: Feb 2014 Drives: 2014 FR-S Location: Upstate NY Posts: 287 Thanks: 127 Thanked 148 Times in 93 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	We'll have to disagree, I think, but 200 ft-lbs is a hulk smash setting. My 1/2" Dewalt won't drive them to final torque, and that's a good thing in my book. We aren't doing green flag pitstops, so the extra 1 minute that using a breaker bar takes can't be the end of the world. __________________ -Mike #24 CS/CSR

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