rear wheel stud question - Team Camaro Tech
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post #1 of 14 (permalink) Old Aug 1st, 11, 07:08 PM Thread Starter
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david
 
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rear wheel stud question

I just bought a set of ar hopster wheels for my 68,went to install and I am only getting about 5.5 turns on my lugs.Im guessing that im getting only 3/8 of a inch of thread.From what i have read you need at least a 1/2 inch.They are 7/16 studs probly original to the car.Dont know if 5.5 turns is safe or should I get new studs.Thank you for any answers.
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post #2 of 14 (permalink) Old Aug 1st, 11, 07:15 PM
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Re: rear wheel stud question

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Originally Posted by white68 View Post
I just bought a set of ar hopster wheels for my 68,went to install and I am only getting about 5.5 turns on my lugs.Im guessing that im getting only 3/8 of a inch of thread.From what i have read you need at least a 1/2 inch.They are 7/16 studs probly original to the car.Dont know if 5.5 turns is safe or should I get new studs.Thank you for any answers.
Get the tire shop you got your wheels from to give you an un-capped lug so you can see how far the lugs thread on.

...Dennis

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post #3 of 14 (permalink) Old Aug 1st, 11, 07:22 PM Thread Starter
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Re: rear wheel stud question

I have one off of my rally wheels I will try it out.
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post #4 of 14 (permalink) Old Aug 1st, 11, 07:26 PM
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Steiner
 
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Re: rear wheel stud question

Yep, you're not even close. 7/16-20 studs means 20 turns per inch. You need at least as much engagement as the diameter of the stud.
7/16 = 0.4375" = 8-3/4 turns
5.5 turns = 0.275"

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post #5 of 14 (permalink) Old Aug 1st, 11, 07:37 PM Thread Starter
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david
 
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Re: rear wheel stud question

So in that case how much longer should my stud be.Thanks
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post #6 of 14 (permalink) Old Aug 1st, 11, 07:45 PM Thread Starter
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david
 
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Re: rear wheel stud question

So in that case how much longer should the studs be.I am thinking about a 1/4inch,but I am not the best at math.thanks
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post #7 of 14 (permalink) Old Aug 1st, 11, 07:46 PM
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Re: rear wheel stud question

Yes, a quarter inch longer at the minimum with 7/16 studs.

'69 Camaro
Dart 400-AFR 195-224/224 HR-Powerjection III TB with F.A.S.T. Sportsman XFI
TKO 600-Moser 3.42-Detroit Truetrac
500hp/538lbft

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post #8 of 14 (permalink) Old Aug 1st, 11, 07:53 PM Thread Starter
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david
 
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Re: rear wheel stud question

Thank you very much for the info.I will see if nappa has what I need.I havent even tried out my fronts,but i am guessing it will be the same situation nothing is ever easy.
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post #9 of 14 (permalink) Old Aug 1st, 11, 09:25 PM
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Re: rear wheel stud question

I just had to swap out all my wheel studs when I went to a vintage set of AR 200S wheels. Had to buy 2 1/2" studs and shortned to 1 7/8". Did it in my garage. Put a lug nut on stud flush with stud end and drive them out with a BFH. Pulled new ones in with a stack of 7/16 washers and lug nut.

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post #10 of 14 (permalink) Old Aug 2nd, 11, 02:22 AM
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Re: rear wheel stud question

Go to your local parts store and ask to see their Dorman wheel stud box.
I went to 2" due to same problem (forget PN )

68 Camaro~LSx ~all motor
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post #11 of 14 (permalink) Old Aug 2nd, 11, 07:57 AM
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Re: rear wheel stud question

You might also consider a set of conical lug nuts instead of longer wheel studs. They have a longer shank that grabs about 1/4" more of the threads than a standard lug nut. http://www.jegs.com/i/Billet+Special...99970/10002/-1

Good info on wheel stud part numbers etc. here: https://www.camaros.net/forums/showthread.php?t=108269


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post #12 of 14 (permalink) Old Aug 2nd, 11, 08:25 AM
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Re: rear wheel stud question

I would try the conicals first like BPOS suggests, may save you some trouble.
If you have stock length studs, you probably need to refresh anyway with 1.5" new studs if you have drums.

I replaced my studs with 2 1/8" (seems to be a standard size, NAPA) , disc brake upgrade, Rushforth Livewires, and when using new conicals I bought with the Rushforths, the conicals botomed out before torquing correctly. I had to go back to standard centric type lugs as I wasn't about to shave the new studs down.

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post #13 of 14 (permalink) Old Aug 2nd, 11, 08:55 AM
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Re: rear wheel stud question

Most lugs are conical, the ones Al is suggesting have a shank on them and are refered to as ET style. The question is are the AR Hopster wheels drilled to accept the shank on ET style lugs?

Without any math involved, a couple threads showing past the nut using a standard conical non-capped hex nut will pass most dragstrip tech inspections at a street legal fun night.

...Dennis

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post #14 of 14 (permalink) Old Aug 2nd, 11, 01:20 PM
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Re: rear wheel stud question

Quote:
Originally Posted by DjD View Post
Without any math involved, a couple threads showing past the nut using a standard conical non-capped hex nut will pass most dragstrip tech inspections at a street legal fun night.
Most like to see a few threads out of the nut (unless closed style) but I think if it was a sanctioned race they'll require at least the length of the diameter of the stud. (1/2" studs = 1/2" of threads showing) and once you hit 9.99 (I think it is, or a certain MPH ?) you'll need longer studs for the front also.

But.... for the street I would think at least a full nut would be ok. (even 3"s of stud showing isn't gonna make it tighter; just if it came loose it would take longer to lose the nut )

68 Camaro~LSx ~all motor
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