Quote:
Originally Posted by Boxstard
Again the point is if the spec was designed for dry or lubed condition. Dry spec can be developed to statistically assure the min clamp force for the application and still under material yield. It is risky to torque with lube when the spec really meant for dry...
I’m sure ARP as a fastener company advocates lube that reduces variations and achieves clamp force intended as consistent as possible for their optimal design without overengineering.
It was just not clear to me if Porsche spec. was based on dry or lubed, as I have not seen factory document specifying to lube.
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And again, the point of any torque spec is getting the correct clamping force between two parts, which is rarely achieved with out proper lubrication of the fastener being torqued.
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