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Originally Posted by 300EVIL
H2O2,
Here’s a pic of the mod I'm doing to the connecting rods. The sides of each rod will be ground flat and polished. This process will knock off a little weight (about .05 ounces) as well as strengthen the rod by removing pits and edges that can become stress risers.
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........................WARNING !........ WARNING !.... WARNING ...............
Leaving the rods polished is going to WEAKEN the rods. They need shot peened now before use to increase the surface strength you have removed by polishing off the cast/forged finish.
A draw back to rod polishing is the possible removal of any case hardening or other surface treatments that would have to be put back into the part once all the other process have been completed....
By polishing you are trying to remove any crack or pit that is potentially a stress riser.
This is not a cosmetic exersise. Shot peening with lead shot will restore the case hardening again.
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