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Engine

Camshaft

A shaft with lobes that open and close intake and exhaust valves at precise timing intervals.

Definition

Cam profile determines how long valves stay open and how high they lift, directly affecting airflow and power band.

Aftermarket cams are matched to compression, induction, and intended rpm range.

Related terms

  • PistonA cylindrical component that moves up and down inside the cylinder, transferring
  • CrankshaftThe main rotating shaft that converts reciprocating piston motion into rotationa
  • Cylinder HeadThe top section of the engine housing valves, ports, and often the combustion ch
  • Engine BlockThe main structural casting that houses cylinders, crankshaft bearings, and ofte
  • ValvetrainThe assembly of valves, springs, retainers, rockers, and camshaft that controls
  • Timing BeltA toothed belt synchronizing crankshaft and camshaft rotation in many overhead-c

Category: Engine · Updated August 31, 2026