To say a car is “cammed” indicates that its camshaft has been modified or replaced, typically with one that alters the engine’s valve timing. This modification changes the duration, lift, and overlap of the intake and exhaust valves’ opening and closing. For example, a car with a performance camshaft might experience increased power at higher engine speeds at the expense of low-end torque and idle smoothness.
The adjustment or exchange of the camshaft is significant because it directly impacts engine performance characteristics. The revised valve timing can yield benefits such as enhanced horsepower and torque, particularly in specific RPM ranges. Historically, camshaft modifications have been a staple in performance tuning, dating back to the early days of internal combustion engine development, as enthusiasts sought to extract more power and improve racing capabilities.
