Performance Cams

It is the cam shaft that governs the amount of lift that a valve has, as below. The greater the valve lift, then the greater the lift rate will be. With a performance cam (or high lift cam) this lift is increased allowing more fuel air mixture into the combustion chamber. This results in greater torque and power at higher revs for the more aggressive cams. When the engine is pulling low revs the modified cam would result in a slight decrease in torque. The benefits to be gained by increasing the lift rate and valve lift are generally greater on a larger engine than a smaller one.

For more information on Performance Cams talk to Amac Engineering