256
1968 Shelby GT350/500/500KR / Re: SHOCK TOWER CAPS
« on: December 16, 2021, 01:15:43 PM »..............it is possible the "copper colored" spots on the OP's caps may be due to a fixture to hold the caps and washers for welding. The contact points for the fixture may have been copper in order to ground the part. The appearance could be influenced (more or less noticeable) due to too high a temperature setting on the welder. Basically, during the welding some of the copper was transferred to the part due to current flow.
Seems a reasonable argument, particularly in the O.P. photos presenting "spots" of copper deposited, but in the second examples (post #17)? In either instance the required welding execution was of the relatively small and limited area of what I would say are tack-welds; these requiring somewhat short duration application of current, and realizing the the potential heat required to heat the steel and melt and flow the copper particularly the sum in the second example..........well, I just don't see the current load in these tack-welds as being sufficient.
Of course in this discussion we have 'assumed' that the discoloration is 'copper', sure looks like it, but............
But if all is so, then it surly was a F.U. execution!
Scott.