The official dyno numbers are in: The supercharged 6.2-liter V8 in the forthcoming Chevy Corvette ZR1 cranks out 638 horsepower.
That's about 20 hp more than the estimates from General Motors' powertrain gurus when they unveiled the new ZR1 and its monster motor last December.

All that power will push the Corvette ZR1, which goes on sale this summer, to a top speed of more than 200 mph, GM says.
What about the grunt? The official number is 604 lb-ft of torque.

The key to that making all the horsepower and torque is a Roots-type supercharger with four-lobe rotors that sits atop the LS9 engine. A liquid-to-air intercooler is integrated into the supercharger's housing.

http://www.autoweek.com/apps/pbcs.dll/article?AID=/20080425/FREE/411854900/1065

my review of the C6 ZR-1

http://www.corvetteforums.com/news/story/2009-chevrolet-corvette-zr-1-3.html

Nice write-up based on the available information.

Think you'll get some seat time in one?

i dont know. ive been a part of a few "media drives", but it wasnt with general motors...[&o]

I can't wait, took my checkbook to my local dealer and got a blank stare, PG.

Maybe your local dealer is already planning to list his allocation on eBay?

Little bit out of my price range but still "affordable" for those with that kinda cash

so is the new ZR1 sposed to have the new corvette body or the old one