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Old 03-01-2009, 07:36 PM
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chicane chicane is offline
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Originally Posted by chevyIIpost View Post
Speaking of studs, I want to change the stock metric ones to 1/2" anyone done this and can share the details?
Yup... and it all depends on the knurl daimeter that you use.

Option one:

The standard ARP 1/2x20x3" that are used are a 0.6250" knurl... but there is no drill on the planet that you can easily use that will make the right interfearance fit... that they require. So... they will have to be machined.

Or find another knurl that will require less attention.


Option two:

You can use the 1/2x20x3" screw in studs. This will require a 29/64ths drill... but it is also more difficult... as there isnt very much room to get the actual stud pass the three bolt flange to screw the stud into the flange.


And an FYI...

The BCA bearing should only be used for a cruiser... as, it is the most affordable... it is also, the lowest quality of the bearings available. Be very wary and careful of components just because they are cheap. This is a component that you SHOULD NOT skimp out on. It can be the difference in you just replacing a wheel bearing... or... replacing a car from failure of a single component that was used beyond it useful limitations.

Last edited by chicane; 03-01-2009 at 07:44 PM.
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Old 03-01-2009, 08:32 PM
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Steve1968LS2 Steve1968LS2 is offline
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By the way.. instead of changing my front studs to 1/2 inch I changed my rear studs to 12mm.

I was easier since they are screw in. I had to special order them since nobody carried 12mm x 60mm (to be a bit longer).

I have extras since I had to buy 100 of them. lol
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Old 03-01-2009, 08:51 PM
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Originally Posted by Steve1968LS2 View Post
By the way.. instead of changing my front studs to 1/2 inch I changed my rear studs to 12mm.

I was easier since they are screw in. I had to special order them since nobody carried 12mm x 60mm (to be a bit longer).

I have extras since I had to buy 100 of them. lol
A 100 thats a heck of a deal. Well at least you have spares.
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Old 03-01-2009, 10:03 PM
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Steve1968LS2 Steve1968LS2 is offline
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A 100 thats a heck of a deal. Well at least you have spares.

Actutally I sold most of them.. made back my money (might of made a dollar profit)..

I still have a couple sets left. I'm saving one set "just in case".. lol
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Old 03-02-2009, 06:43 AM
Silver69Camaro Silver69Camaro is offline
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Just to add some more information:

Up until Timken started making hub assemblies, there was one manufacturer at a time making these hubs out of three. Quality and appearance is almost exactly the same for each. Normally I would agree that BCA bearings are "moderate" quality, but theirs was just a reboxed hub from one of three manufacturers.

I talked to the design engineer at SKF about the new ZR1 hubs. These things are amazing and should be considered for anybody who puts any REAL abuse on their car. If your car is 90% street, I wouldn't bother with them.

We looked at redrilling the C6 hubs for 1/2" studs, but there are very few studs out there that have the correct knurl. Common 1/2" studs require too large of a hole to be drilled and significantly compomises the strength because it leaves little material between it and the outer hub diameter.
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Old 03-02-2009, 09:18 PM
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Default thanks for all the info guys

thanks for all the info everyone. this is a great site. steve i am interested in a set of studs if you want to sell one. and what color is bad penny? do you think it would look good on a 67 firebird convertable?
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Old 03-02-2009, 09:34 PM
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Originally Posted by sun6fish View Post
thanks for all the info everyone. this is a great site. steve i am interested in a set of studs if you want to sell one. and what color is bad penny? do you think it would look good on a 67 firebird convertable?
Sure deal.. Let me go check my stock to make sure I have enough... Would suck if I really only had 9.. lol

Penny is '02 Prowler Orange. I prefer OEM colors since they are much easier to repair if damaged.

What colors do you prefer? Blues, Reds, Metal tones?
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Old 03-03-2009, 02:54 PM
ElkyZO6 ElkyZO6 is offline
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I'am a parts manager at a gm dealer and I can hook anyone up on c5/c6 hubs for 325.00.
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