Battle of the Lifters: Flat Tappet vs Roller, Solid vs ...
2019-11-14u2002·u2002One reason is that roller lifters have less friction on the camshaft, which makes it easier for the cam to spin. Additionally, lobe profiles can be much more aggressive. The cam can open and shut the valves much faster, which means they can keep the valve at full lift longer as well. This is because of the rollers on the bottom of the lifter ...
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