340 or 408?

Again....

For anything that's gonna see street duty or any application other than straight line drag racing, the area under the curve will reign supreme.

Think of it this way. with these "apples to apples" comparisons where they only change displacement. What are they *really changing*?

The answer to that is the mass flow rate of air flow --- and in turn the amount of fuel burned --- and in turn the amount of energy output --- for a given cycle is going up as the displacement goes up.

These power curve overlays are really just illustrating the airflow limitations of the combo. Hence they all make about the same peak horsepower.

What they are also showing --- and this is crucial --- is that the larger combinations are taking greater advantage of the flow processing capabilities of the engine, over a much larger rpm sweep.