It is vital to choose the best kind of camshaft for your car’s engine build before ordering any other parts. Meanwhile, the engine application is a significant factor to consider in choosing the best camshaft for your engine. Cams that have durations between 195 and 210 degrees measured at a .050” cam lift is considered the best kind of camshaft for stock engines that are unmodified and those with computerized engine controls. If you go above 210 degrees to 220 degrees, the intake vacuum will start dropping. It is also important to note that a bad camshaft can affect the engine valves and produce a clicking engine sound.