"Lovell Factor" Inlet Valve Mean Gas Speed
Understanding some of the math involving an engine's breathing, or pumping capacity, is vital to predicting the ultimate potential of that engine. A well understood measure is a simple formula to calculate "mean gas speed of the inlet valves". This is called the "Lovell Factor".
For example, to show the progress in modern racing engines, first take a look at an earlier Formula1 engine, the Cosworth DFV four valve V8: With a bore of 90 mm, a stroke of 58.94 mm, 36.5 mm inlet valves, and an rpm limit of 11,000 RPM, these specifications yield a "Lovell Factor" of 65.7 meters /second. This was the final variant of the venerable Cosworth V8.
The modern V10's, and now the mandated V8's in Formula 1, have RPMs in the 19,000 to 20,000 RPM range, and the "Lovell Factors" are in the regions around 70 to 77 meters per second, mean inlet valve gas speeds. This is necessary to produce the insane amounts of power they produce. Pneumatic valves, variable length inlet trumpets, exotic coatings and lightweight components are required to keep the engines alive and to make this much power, which is around 300 horsepower per liter.
Compare this with your engine. You may see that your inlet mean gas speeds are going very high in some cases which could indicate your valve area is insufficient for the speeds.
Your Inlet Valve mean gas speed is defined by five variables which are defined as:
"Lovell Factor" Calculator