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Modifications in conrod, serations in the bottom end?

1.bottom end bering housing and rod are made in three piece or two piece,so lower end of con rod has a wide angled(45) wedge form.rather than a flat end after considering various experiments.this gave a stiffer
bearing housing and reduced stress raisers and reduced fatigue failure.it also help in easy overhauling procedure of piston
2. V slotted serrations with the slots being radius-ed.the serrations are better at taking shear loads and prevent it transferring to the keep bolts. they reduce fretting of mating surfaces
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