3 inch wheel stud question - Team Camaro Tech
 
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post #1 of 5 (permalink) Old Aug 10th, 10, 01:46 AM Thread Starter
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Greg
 
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3 inch wheel stud question

So I'm switching from a set of 15x15 Centerline Autodrags to a set of 15x15 Weld Prostars. The prostars require longer studs, so I got these
http://www.summitracing.com/parts/MOR-46180/

The old stock style studs mic'd .610 at the knurl and the new studs are .615....should be just fine.

I pulled the axles and had the new studs pressed in. They looked good, but when I tried to bolt the Prostars on, the studs don't seem to be perfectly centered in the holes of the Prostars. I tried putting the long shank style lug nuts in anyway and they won't go. Being a long shank style, the stud needs to be perfectly centered in the hole and they're not.

What the hell? The old wheels are 5 on 4 1/2" as are the new Prostars. The studs seem to be fully seated in the axle. What could be causing this? I haven't tried bolting the old wheels back up to see if they line up, but I will tomorrow. The rear is a 9" by the way.

1968 Prostreet Camaro - 540ci Big M, Dart Heads, 200-4R, narrowed 9"

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post #2 of 5 (permalink) Old Aug 10th, 10, 02:40 AM
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Re: 3 inch wheel stud question

Either they flexed the flange pressing the studs in/out or they're not seated properly ?
I had the same issue until I got them on once and torqued. Yes it's a PITA

To see whats going on try to use a small square to find what one/s are the problem child.

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post #3 of 5 (permalink) Old Aug 10th, 10, 03:59 AM
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Re: 3 inch wheel stud question

X2 with Doug. There could be a burr from the knurl under the head cocking the stud.

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post #4 of 5 (permalink) Old Aug 10th, 10, 08:55 AM
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Al
 
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Re: 3 inch wheel stud question

Quote:
Originally Posted by SS14PSI View Post

What the hell? The old wheels are 5 on 4 1/2" as are the new Prostars.
The standard Chev passenger car lug pattern was 5 on 4 3/4. Could that be your problem, or just a typo?

edit - ooops - Furd rear.


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Last edited by BPOS; Aug 10th, 10 at 09:17 AM.
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post #5 of 5 (permalink) Old Aug 10th, 10, 11:00 AM Thread Starter
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Greg
 
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Re: 3 inch wheel stud question

I just spoke with the machinist who pressed the studs in and has the new studs and axles for round 2. He said it looks like the axle flange may not be perfectly flat. He's going to square it up and bring it by this afternoon. I'll keep you guys updated.

Any other suggestions are welcome as well.

1968 Prostreet Camaro - 540ci Big M, Dart Heads, 200-4R, narrowed 9"

2002 Hayabusa - 1464cc Muzzy's Big Block, low and slow
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