This is a question that is rarely asked before an engine blows, but always asked after the second one is in a basket.
The formula is simple: divide 22,000 by the stroke.Why 22,000 you ask ?Well, the automotive industry came up with this number after decades of engineering research using literally hundreds of stroke lengths - and we believe it's probably correct.Example: The engine we just finished testing had a 3.000" stroke so 22,000 divided by 3 equals 7,333 safe peak power rpm (which we slightly exceeded for our test).
Now that you know - just keep on truckin.