[jm455ho]

Also depends on the type of lube used

[Half-Inch Stud]

Originally Posted by jm455ho

Also depends on the type of lube used

Yes. Let's go through the worst-case example: A fella is told to Torque the 1st 4 Main Studs to 130 ft-lbs using a slippery lube. The Main Saddles would build up a hoop stress that exceeds the Main saddle width, and the hoop cracks early in life. Such a Spec makes me angry.

[Graham355]

I am no expert, can you please explain what you mean by "hoop stress".
Thanks.

Factory bolts have a coarse thread, while studs have a fine thread on the end the nut goes onto. So I guess it would take much less torque to put the same load on the threads in the block. To stretch the studs the correct amount (whatever that is) I guess would take a bit more load than a factory bolt. Overall I would think the torque setting would be lower than for factory bolts but I would follow stud manufacturers specs (as should the machinist IMHO).
Just my thoughts/ideas.