[AKnowles]

One other item that has not been discussed is a very well balanced engine can also have s higher safe RPM range. I don't know enough about the boxster engine but suspect if it is properly balanced and the proper upgrades are made to the valve train you could exceed the current RPMlimits if the DME were reprogrammed. I could be wrong though.

On prior cars and particularly motorcycles though a precision balance has raised horsepower, torque, and RPM. If I were to rebuild my engine I would get it professionally balanced.