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Message: [QUOTE="KCTurbos, post: 907206, member: 13852"] I will try not to rebuttal every post you made (that gets very long) Considering your background I know you know this info but I am just posting it for clarification. The main confusion we seem to have is that tensile strength and clamping force are not the same thing but closely related. Tensile strength refers the the property of the metal and how much stress it can handle before yielding. Clamping force is how hard you clamped down. If you were to just hand tighten the nut on the stud then you would have almost 0 clamping force but the stud could still hand 220,000 psi tensile strength. Theoretically once you have completely torqued the stud down you have reached the near maximum tensile strength of the stud and maximum clamping force(eliminating all other variables that cannot be controlled). That is why i said that with less tq on the h11 stud you are reaching 20,000psi more of tensile strength (without yielding the stud) which will equate to more clamping force with less stretching of the stud. Now I agree with you that the arp 625 exibit weird properties you have to stretch/tq them down even more to reach the higher clamping force/psi tensile yield point. [/QUOTE]

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