* The first is to look at the camshaft's duration. This is the measurement of how long the camshaft holds the valve open. The duration is measured in degrees of crankshaft rotation. A camshaft with a longer duration will open the valve for a longer period of time, which allows more air and fuel to flow into the engine. This can increase the engine's power.
* The second is to look at the camshaft's lift. This is the measurement of how high the camshaft lifts the valve. The lift is measured in millimeters. A camshaft with a higher lift will open the valve further, which allows even more air and fuel to flow into the engine. This can also increase the engine's power.
* The third is to look at the camshaft's lobe separation angle. This is the measurement of the angle between the two lobes on the camshaft. The lobe separation angle is measured in degrees. A camshaft with a wider lobe separation angle will have a smoother idle and will produce more low-end torque. A camshaft with a narrower lobe separation angle will have a more aggressive idle and will produce more high-end power.
By considering the duration, lift, and lobe separation angle, you can get a good idea of how big a camshaft is and how it will affect your engine's performance.
