This is true. However, horsepower does not equal speed or torque. My old BMW M-5, inline 6 dohc with the standard Bosch injection is pumping a healthy 315hp without a turbo, tops 180mph, actually takes 20 mph corners at 90 mph thanks to TRX tires, Bilstein competiton shocks and shaved down 7 series ball joints. The Dinan chip replacement and 7 series turbo will adjust those numbers a bit upward.
600hp is useless if you only use 300. Now, as with the new Corvette, you are absolutely right, except the chip limits the car to 155 mph. Makes you want to cry.
The only Vette with a speed limiter is the base car. The Z06 and ZR1 do not have limiters. The reason is insurance costs and the tires.
By the way, it takes about 60 seconds to remove the limiter on a standard C6 if you have a programming tool.
Bleah, TRX tires. Gah. Go fit some later wheels already, you have no idea of all the traction you’re missing out on.
Oh, and NO, that Viper is a hell of a lot faster than 155mph. I haven’t tracked him for a while, but if memory serves when last I looked at his stats, he’s one of the members of the 200mph Viper Club.