The more RPM's your turning the more movement your engine and it's internals are enduring. One hour at 4000 RPM twice as much movement as one hour at 2000 RPM. Like saying driving an hour at 70MPH as opposed to an hour at 35MPH. Your tires traveled twice as far and therefor will have twice the wear. High RPM get much worse nearing max RPM. Max RPM is the limit that the engine can take before severe damage. Running at or near max RPM for extended periods will drastically reduce engine life. Engines are usually more efficient at lower RPM
just saying at 50 percent ballast operating honestly i think actual frequency is not right so its not working properly