Fact Vs. Fiction On Hydraulic-Roller Cams
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It’s obvious from the shape of a hydraulic-roller cam lobe compared to a flat-tappet that the roller offers more duration at the higher lift. The flat-tappet cam lobe is more pointed while the roller cam nose is more blunt, which means the roller is holding the valve open at higher lift longer. That’s a good thing. View Related Article
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