Mean piston speeds

UPDATE: OK Shaun, I get it... Mr Truth hahaha.... let's edit this post to better reflect what was meant. :)

Continuing from the last entry, let's say 25 m/s is the maximum permissible mean piston speed for any 4-stroke engine to be reliable.

Generally speaking, for the vast majority of street production engines, redline begins when mean piston speeds are about 20 m/s. In practice it is possible for certain engines to have mean piston speeds go beyond 25 m/s, with peak piston speeds far higher.

Whether it is desirable to do so or not due to possible additional gains in horsepower, is not the focus of this post. Instead, this is a general observation of what constitutes manufacturer-imposed rev limits on production engines. Obviously access to logs, experimental data and even experience would yield a better picture of what is a "safe" rev limit, but the difficulty is compounded by the definition of "safe". Does "safe" mean an engine of a certain configuration can last 1000 miles? 10K? 100K? However it is undisputed that revving an engine to high speeds will directly contribute to increased wear and mechanical loads being placed upon it.

With that out of the way... perhaps we can get into some observations.

For a stroke of 88mm as found on a stock Evo, 25 m/s is reached at 8500 RPM. Redline on the car begins at 7000 RPM, where mean piston speeds are 20.5 m/s.

For a stroke of 94mm as is commonly found on 2.2L engines, 25 m/s is reached at 8000 RPM.

For a stroke of 100mm (e.g. 2.4L engines), 25 m/s is reached at 7500 RPM.

For a stroke of 39.4mm, M.P.S. of 25 m/s is 19000 RPM. Sound familiar? It should.... because that's the rev limit of current 2.4L V8 Formula One engines. This is definitely not coincidence. Rules aside, is there a reason why they do not rev higher?