In vehicle engineering, camming is the practice of upgrading an engine's camshaft to increase driving power.
A cam is a disk or cylinder shape that rotates to transfer power and energy to other elements in an engine, and a camshaft is the rod along which these cams are mounted.
Camming refers to the replacement of this shaft with an upgraded part that can convey more kinetic force. Camshafts can achieve these changes in different ways, including by leveraging different physical connection points, creating different timing with their motion, and facilitating increased flow of air through an engine.
Upgrades like these tend to be more efficient at higher RPMs, so they're more common in performance vehicles than everyday rides.
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