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A comment on Porsche found a way to 3D-print lightweight pistons that add more horsepower. Parent comment

Re:Porsche found a way to 3D-print lightweight pistons that ... by thrwy_01 on Monday July 13, 2020 @10:07PM (#23827794)
Powdered metal camshaft lobes have been in wide use in production vehicles for several decades.
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Re:Porsche found a way to 3D-print lightweight pistons that ... by culturestate on Monday July 13, 2020 @11:01PM (#23828028)
Powdered metal parts are everywhere today, but it's not really an additive process - you pour a bunch of powder into a mold, compact it, and then bake it.

PM parts are also porous and fairly weak (in some dimensions) relative to machined counterparts, so you don't typically see them in critical applications.

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Re:Porsche found a way to 3D-print lightweight pistons that ... by ip26 on Tuesday July 14, 2020 @12:38AM (#23828574)
Yeah, now that you mention it, camshafts have quite a reputation for fragility. I always wondered how a rod of solid steel could fracture like that.
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