With the new 600-horsepower 2008 Dodge Vipers starting to hit the streets, it was only a matter of time before someone put one on a dyno to see what kind of juice the snakes are sending to the rear wheels.

That someone, in this case, is longtime Viper tuner Hennessey, and their new car made 546 horses and 516 lb-ft of torque in stock trim.

According to DragTimes, if you factor in a 13% drivetrain loss, the new Viper is actually making around 615 horses.

Not shabby, to say the least. Hennessey dynoed the car a second time after making some exhaust mods and was able to raise those numbers to 574.95 rwhp and 537 lb-ft.

Head over to DragTimes to see the graph. We’ll take one in green, please.

Thanks for the tip, Fiske!

[Source: DragTimes]