That's over reving to you? this is a rotary engine, which means it will take MUCH higher revs than that. This engine will actually take 13000+, but the transmission can't handle it.
I love the high rev sound of these engines but its just horrible for the size of these engines how much gas they use. Theirs cars with twice the power that get better mileage. Hell 600HP viper gets 20+ highway.