Originally Posted by hirdlej

You can adjust the pulse width of the injectors to compensate for size, but what Bill is referring to is the injectors ability to atomize the fuel. The less pulse width you command, the shorter duration the injector fires and you're atomization isn't as great. Having a huge injector doing a small amount of work (in a small motor) isn't a great idea. This is where your idle quality and low engine speed operation suffer.