GT500 Titanium Lug Nut Solution

[kilobravo]

I went with ARP lube and #120, no issues..yet.

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[Tomster]

I went with ARP lube and #120, no issues..yet.

Right. But I was curious if anyone has any tech data for the correct torque. I'm guessing just like everyone else it seems. It is very important to set the proper torque to achieve the correct preload on the stud. Too much or too little is bad.

 

[marklboris]

I went with ARP lube and #120, no issues..yet.

KB, what made you choose 120#? By the way, like your Avatar

 

[Snoopy49]

From the 2020 GT500 Owners Manual Supplement.
This is for the stock lug nuts, no lube.

 

[kilobravo]

KB, what made you choose 120#? By the way, like your Avatar

As I recall Mark, Tom and I and a few others I think, had this discussion awhile back. #120 was what I took from the conversation, I don't have any inside dope. It's a bit of a strain for this old bastid just to go that high, I think I might need a youngster if it were #150. :-) But I think the main point, if my my memory is correct, was that lubed studs need some amount less than the un-lubed torque spec.

Roger on the avatar, <smile> some like it, some don't. <chuckling> But, like all the others, it won't last long.

 

[Tomster]

120 is what I recommended and what I use, but it is not based upon any real data. It was based upon the 150 recommended setting minus a 20% torque reduction due to the decrease in friction from the thread lube. A while back, I called ARP and spoke to an engineer. They refused to give me any kind of torque reduction for use with their lubes (I suspect due to product liability). The manufacturer of these lug nuts is yet to give a specific torque value that is based upon anything more than this is what most people are using..... Even though they are sold by one company, I believe they are also sold and manufactured by ZL1 addons. The packaging looks exactly the same, the nuts are the same, they just seem to have a different specification for the length for the particular application. Maybe ZL1 addons did the necessary testing??? I doubt it.

I recently went to the Ford GT manual for 2020 and saw that they use the same torque spec, 150 ft/lb. The reason I did was because it is my understanding that Ford offers a Ti lug option. They use the same type of lug and making the assumption that the studs are the same (which is a big if) could lead us to a data driven and proven torque setting. Now, if someone would like to do a little leg work and find out what the Ti lug nut torque setting is for the GT, and the associated thread lubricant, we may have something more than just a WAG (wild ass guess).

There are a lot of ifs. However I feel its better than here's your lug nuts, no torque, no nothing, go figure out your torque setting.

If you are going to use these lugs for anything other than easy peasy street cruising, the torque value should be verified through a properly equipped facility staffed with a trained individual to determine the torque for a specific thread lube and nut to achieve the correct preload on the stud.

 

[marklboris]

As I recall Mark, Tom and I and a few others I think, had this discussion awhile back. #120 was what I took from the conversation, I don't have any inside dope. It's a bit of a strain for this old bastid just to go that high, I think I might need a youngster if it were #150. :-) But I think the main point, if my my memory is correct, was that lubed studs need some amount less than the un-lubed torque spec.

Roger on the avatar, <smile> some like it, some don't. <chuckling> But, like all the others, it won't last long.

I have been going with 130-135# but I can just as well go with 120#. Not like I am tracking the car or anything and I do use the same ARP lube everyone else is using.

I mentioned your avatar because it looks like one of the photos of my car was used.....

 

[Tomster]

I have been going with 130-135# but I can just as well go with 120#. Not like I am tracking the car or anything and I do use the same ARP lube everyone else is using.

I mentioned your avatar because it looks like one of the photos of my car was used.....

And that's the whole problem Mark. Nobody really knows what the correct torque value is.

You will probably be fine. But for a track setting, I use proven lugs and torque values determined on data from the OEM.

 

[Snoopy49]

Here is an interesting read, it is a little dated.

Fastener Design Criteria

 

[gfcobra04]

Here is an interesting read, it is a little dated.

Fastener Design Criteria

Can you help us out and tell us which pages out of the 100 we should read?
Thanks

 

[marklboris]

And that's the whole problem Mark. Nobody really knows what the correct torque value is.

You will probably be fine. But for a track setting, I use proven lugs and torque values determined on data from the OEM.

Thanks Tom, I think I will go with your suggestion and use 120#

 

[Tomster]

Thanks Tom, I think I will go with your suggestion and use 120#

Thats using ARP assembly lube.

 

[marklboris]

Yes that’s what I have been using.

 

[kilobravo]

..it looks like one of the photos of my car was used....

And you'd be correct, Mark. Your photos make it easy. :-)

 

[50 Deep]

I went with ARP lube and #120, no issues..yet.

I have been going with 130-135# but I can just as well go with 120#. Not like I am tracking the car or anything and I do use the same ARP lube everyone else is using.

I mentioned your avatar because it looks like one of the photos of my car was used.....

That all sounds about right. Most have been using 135 ft/lbs with ARP assembly lubricant. Wildly successful on all of our street, track and truck builds for years.

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