The most high performance Cobra I know of that is running today is Bruce Cambern's # 3170. He spoke of the challenge of driving it in this thread:
Click here. See comment #56 to read how he had to modify his throttle to make it possible for the driver to handle his 600+ HP. ... My point is that "enough power" is not an absolute quantity. It depends on the driver, the environment and all the components that must work together in the car.