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M3 Track: Racing and DE Best mod for speed is learning to get the most out of what you currently have. Tracks and DE's is the place to start!


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Old Wed, Aug-14-2019, 05:13:03 PM   #1
AXDB
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Default M14 Stud Conversion

Something I haven't seen beat to death yet that I am considering converting over is to M14 studs. It looks like rogue sells a tool to do the conversion. I fully understand that over tightening wheels and usage will result in the need for new studs.

Any real world usage examples out there where track rats are seeing increased longevity vs the m12 stud?

https://www.rogueengineering.com/Rog...Jig_p_265.html
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Old Wed, Aug-14-2019, 06:13:09 PM   #2
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Default Re: M14 Stud Conversion

That's a really good question. IMO, it's not the repeated tightening that stresses these studs (unless one over tightens), it's the heat cycling. And I'm not sure a 14mm bolt that's been made brittle from heat cycling is significantly stronger than a 12mm bolt that's been made brittle from heat cycling??

I'd personally be scared to drill and tap the rears while on the car. It'd be a super PIA to F those up and have to replace them.
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Old Sat, Aug-17-2019, 01:39:47 AM   #3
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Default Re: M14 Stud Conversion

Yeah, I'd just stay with M12 and get the MSI NASCAR studs if you want something a little stronger. Turner sells them.
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Old Thu, Aug-22-2019, 03:14:48 AM   #4
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Default Re: M14 Stud Conversion

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Originally Posted by MaynardZed View Post
Yeah, I'd just stay with M12 and get the MSI NASCAR studs if you want something a little stronger. Turner sells them.
Thats what I run. No complaints.

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Old Sat, Aug-24-2019, 03:05:20 PM   #5
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Default Re: M14 Stud Conversion

I don't think its a terrible idea but it takes some skill and experience to do that.

There's more clamping force with an M14 stud. I haven't seen a wheel hub from a new car with M14 studs...wonder if the hub face is thicker? It would be a waste if the hub isn't thick enough to handle the increased torque. For example, when you upgrade a fastener from a grade 5 to grade 8...that means you upgrade the bolt, nut, washers, lock washers, etc.

If Rogue is saying the studs provide 30% more strength...can the wheel hubs support 30% more strength?
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Old Sat, Aug-24-2019, 05:15:17 PM   #6
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Default Re: M14 Stud Conversion

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Originally Posted by bigjae1976 View Post
I don't think its a terrible idea but it takes some skill and experience to do that.

There's more clamping force with an M14 stud. I haven't seen a wheel hub from a new car with M14 studs...wonder if the hub face is thicker? It would be a waste if the hub isn't thick enough to handle the increased torque. For example, when you upgrade a fastener from a grade 5 to grade 8...that means you upgrade the bolt, nut, washers, lock washers, etc.

If Rogue is saying the studs provide 30% more strength...can the wheel hubs support 30% more strength?


Strength of hub isnít needing to change. Wheel clamping force is the same. Iím trying to avoid changing studs every 2 years and move to every 3-4 or something of the sort.
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Old Sat, Aug-24-2019, 11:29:26 PM   #7
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Default Re: M14 Stud Conversion

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Originally Posted by AXDB View Post
Strength of hub isnít needing to change. Wheel clamping force is the same. Iím trying to avoid changing studs every 2 years and move to every 3-4 or something of the sort.

The reason why you torque the wheels is to develop tension on the nut to prevent it from backing off. If you increase the size and strength of the fastener, you need to torque the lug nut to a higher ft/lb spec to develop some stretch on the fastener to prevent the lug nut from backing off.


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Old Mon, Aug-26-2019, 02:33:06 AM   #8
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Default Re: M14 Stud Conversion

It's an expensive option but I went with these

https://www.core4motorsports.com/pro...hub-conversion
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Old Mon, Aug-26-2019, 02:57:15 AM   #9
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Default Re: M14 Stud Conversion

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Originally Posted by Nugs View Post
It's an expensive option but I went with these

https://www.core4motorsports.com/pro...hub-conversion
That's what I have as well, front and rear.
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Old Wed, Aug-28-2019, 04:26:56 PM   #10
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Default Re: M14 Stud Conversion

That dude that was at Road America with us did it to his m3 and hasnt had an issue in many years...

where as I snapped one right after I punctured a slick, then had to drill out the broken stuf lol.... gooood times
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Discussing M14 Stud Conversion in the M3 Track: Racing and DE Forum - Best mod for speed is learning to get the most out of what you currently have. Tracks and DE's is the place to start! at BMW M3 Forum.com (E30 M3 | E36 M3 | E46 M3 | E92 M3 | F80/X)