It is a measure, in thousandths, of how far the cam lobe lifts the valve open, off of the seat.
look on the internet you fool.
A camshaft with higher lift, longer duration and most importantly, more overlap
That is called the lift
if you raise the lift and duration, you will raise the horsepower.
No, the rough idle is the result of a high lift cam.
remove the valve cover,remove timing belt , lossing all caps that hold camshaft,then remove the caps, lift out the shaft.
Service manuals can be found at library or auto parts store
With Old fashion guages that measure the normal size of the run and then the rise of the lobe.
the valve oerlop increase
To remove the camshaft from a 2.2L Cavalier, first disconnect the negative battery cable and drain the engine oil. Then, remove the intake manifold and valve cover to access the camshaft. Next, unbolt the timing chain or belt, followed by the camshaft bearing caps, and carefully lift the camshaft out of the engine block. Ensure to follow the manufacturer's specifications for torque and sequence when reassembling.
Rotate the crankshaft clockwise after TDC. Rotate the camshaft until the gauge reads that it is at full lift. Then rotate the crankshaft until the inlet valve of number one cylinder is just off full lift position, and record the number on the timing disk. Continue to rotate the crank clockwise until the valve has opened and then closed again, and record this number. Add these numbers together and divide by two to find the number that is the full lift position. This will time your camshaft.
there should be a number stamped on the front of the camshaft. provided you know the manufactorer, go to their website, type the number in and you will see whats called a Cam Spec Card with all duration, lift, and lobe seperation.