If you’re building late-model dual overhead cam (DOHC) engines, you’ve probably noticed that a chain rather than a belt drives the camshaft. But why is this the case when chains are more expensive to produce?
In 2005, Ford introduced a three-valve (3V) SOHC version of the 4.6L for the newly restyled retro-look Mustang. Major changes included the use of two intake valves and one exhaust valve per cylinder to increase air velocity, torque and power, variable cam timing and a weight-saving aluminum cylinder block. Ford’s overhead cam 4.6L V8 engine has been