| Re: Primary pipe length formula
So here is the plot of horsepower for these engines.
It is important to point out that this is the indicated power from the engine, neglecting friction due to rotating components and sliding pistons. The amount of friction will also increase with displacement at a given RPM.
The power is increasing throughout the RPM range with increasing displacement. It is beginning to become constant at about 575HP at 7000 RPM for the 402 CI engine. This is indicating the limit of our heads, induction, and exhaust. If we wanted more peak power than this, we would have to go back to the drawing board.
If we continued to increase displacement with this combination, the peak power would not go up, but the lower RPM range would continue to increase. Adding displacement will not necessarily increase max power, but it will almost always increase the area under the curve. |