TSE says factory spec on these brackets(36-51 ft/lb), they are using std 3/8 hardware and the bracket doesn't have a steel insert.

Assuming they are 6061-T6 I am finding the suggested torque with .500" of thread engagement to be 24 ft/lb with a max torque of 32ft/lb.

What are you guys torquing your bracket bolts to? You guys using loctite on the bolts?

Calculator is here:FUTEK Bolt Torque Calculator | Bolt Torque Calculators

 

My 11.75" brackets have steel inserts....

 

News to me - our brackets don't.

I've never stripped one of the threaded holes in our brackets, nor have I ever heard of anyone else stripping the threads out. I would stick with the factory torque spec.

 

lol. ok, then it's the m-tuned brackets that have the inserts....
sigh.

 

I got to be honest sav. I was a bit disappointed when I got my kit to see threaded alum. without inserts. Where I work it's pretty standard to use inserts in aluminum just in case for anything larger than 1/4-20 (depending on application). Something like a brake kit, I think it would be great piece of mind with little added cost.

That being said, I run your kit and am by no means worried...it just would be a nice little extra.

 

I see your machine shop experience and raise you my own. Where we did no such thing.

If the threads might fail, the insert might fail. Might as well make the whole thing steel!

/dumb

 

You realize an insert would increase the thread torque rating right(larger ID on the alum would increase the surface area)?
I am just saying I don't to lay down 50ft/lb on the bracket and rip out the alum threads.

I was hoping to get some, "I run 275 hoosiers and XP20's, torque to 50ft lb, car weighs 2500, had my BBK for 2 yrs, had the brackets off 8 times, and no issues" type responses.

 

Threaded insert is no panacea. I've stripped the insert out of one of my Goodwin Racing brackets just torquing it to 40 ft-lbs.

 

I ran the original proto 11" brackets on Theseus for a year and a half, and I've been using the same 11.75" brackets for at least that much time. I can't remember how many times the caliper's been off - way more than 8 for sure. Never had even the slightest inkling of an issue with the threads in the brackets.