Quote:
Originally Posted by lucittm
It is a shame that someone would produce such a well-finished bolt and then not mark it with their name.
I have heard that many factors can affect the torque reading: thread friction, material friction under the nut, temperature, bolt twist, phase of the moon, etc. But bolt stretch is the engineered way of determining how "tight" the fastener is. I would not have expected a 20 ft. lb. difference in the two methods. Maybe ARP is adding a safety factor for folks without a stretch gauge or the ability to use it properly by decreasing the torque value read from a torque wrench?
Mark
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I wonder if the rod material has much to do with the differences we're seeing? For example: if they set he standards/testing on CroMo/ Ti rods, would that be the same as forged steel rods?
06-15-2011, 05:51 PM
