Chevy Camshafts - Got Lobes?
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Flat-tappet cams work well in many applications, but they create much more friction than their roller brethren. And as shown here, flattappet profiles can only be so aggressive before reaching their limits. This diagram also illustrates why flat-tappet lifters can't be reused when installing a new cam, since the two mate during break-in. Roller cams create much less friction and can reach higher velocities, allowing for more aggressive profiles that can achieve higher lift levels within a given duration. View Related Article
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