The power curve is actually very nice. Horsepower just keeps climbing throughout the entire rev range is a fairly linear fashion. There is just gobs of torque everywhere and the torque curve does not fall off a cliff.
SeriousHP in Houston plans to tune this car on E85 and we have already seen some of their E85 results. We will see how far they take this car but on ethanol with more boost we should see some massive bolt on numbers.
Oh, and the Hellcat is putting out over 100 wheel horsepower more than the Viper. Maybe time for that car to get some boost as well?