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Rollarizing your engine

I came across this video showing a company that uses rollers instead of ball bearings on an engine. Supposedly it does something like reduces drag and heat to increase HP. Just wondering if anyone has ever considered doing this to a Porsche engine.

Watch "Rollerized Engines" Video at Engineering Videos - Engineering TV

Quote:

Originally Posted by Kaliv (Post 6671607)

Porsche used roller rod bearings in the early Carrera 4-cam engines (Hirth crankshafts) until the failures became an issue. Switching to plain tri-metal bearings restored durability and reduced maintenance costs.

F1 engines don't even use roller bearings for the crank and rods, only in accessory drives and camshafts.

Most use of roller engine bearing are still found in motorcycle engines.