Proper torque for ARP 1/2" screw in studs?

[badazz81z28]

Looks like my 12mm corvette/DSE studs are 100ftlbs, but many old post say 85ftlbs. Which is right? I just don't want them to loosen or bust a stud off

[andrewb70]

I go to 100 on my 1/2" ARP studs.

Andrew

[TheJDMan]

Technically, anything between 80lbs to 100lbs is acceptable. Personally, I go to 85 on my 1/2" ARP wheel studs.

[Nine Ball]

I go 100 ft-lbs.

[icemanrd19]

I want to run the same wheel studs on the front and rear of my car. Both are DSE setups. Rear i think are 1/2 x20 wheel studs and the front dse subframe is 12 x 1.5. I would like to switch the front to 1/2 studs so i can run longer studs on the front and the same longest.

Anyone know the front stud knurl diameter? Im showing .5011 on napas website for a stock c6 hub

I was looking at arp 100-7722 which .549 knurl. Any advice on making sure i open the hole up perfect to pull the stud in or is the size difference too great?

[iadr]

that is too great a difference to pull in for sure!

[Build-It-Break-It]

I used .625 knurl arp 1/2-20 wheel studs and 39/64 drill bit to install my front arp wheel studs into my c5 hubs.

[parsonsj]

It depends on lube. 85 - 90 for lubed threads, 100 dry.

[MonzaRacer]

It depends on lube. 85 - 90 for lubed threads, 100 dry.

This will depend on the type of lubricant. If you use silver nickel based anti seize torque to 100, light motor oil I would do the same. I am not sure about any other "approved" lubrication.
I prefer the anti seize as that was what we were taught in tech school and a few years back one of the tire dealer trade publications did some testing on lubing and types and the overwhelmingly approved to NOT cause over torquing was the silver nickel based anti seize.
The main reason was the test proved it caused LESS than 5% change in bolt stretch,,, and I have found that after having to repair/touchup stud damage for numerous reasons it also helps things work together without total carnage/failure.
I have also found regular 30w motor oil and wheel bearing grease to NOT cause loosening issues.
I have recommended to many drag racers and SCCA participants to recheck wheel lug torque during said types of driving.
Remember torque is the way to properly STRETCH any said fastener so as to provide the proper preload.
Over stretch and you get breakage and wheels working loose.

[parsonsj]

I have recommended to many drag racers and SCCA participants to recheck wheel lug torque during said types of driving.

Yes, it's important to re-check your lug nuts through out the weekend. Just make sure you do it cold. Checking lug nut torques with a hot car will lead to over-torqued lugs -- those settings are designed for ordinary temperatures, not the elevated temps you get when you first come off the track. Check your temps when you come off the track, and your torques once the car has cooled down.