Oranges, apples, etc.
Viper's lap record was set on R-comp race tires.
Corvette ZR-1 time was set on street tires.
Equal tires and the ZR-1 crushes the Viper. The Dodge guys of course test it on race tires because that's the way it comes from the factory.... as it is not a "street car" but a race-ready car (i.e. the ACR, which stands for "American Club Racer") available from the factory that happens to be street "legal" even if not really useable.
"Crush"?? Pure hyperbole.
The Viper was running street legal tires; Michelin Pilot Sport Cup tires to be precise, as installed at the factory. These tires are also factory installed on BMW M3s and Porsche GT2s as well as the Viper. The Vette was running Michelin Pilot Sport 2 rubber.
The class rules are simple. Unmodified, street legal, factory sports cars.
The Viper ACR is quite usable for the street. Loud and harsh, but perfectly okay if you don't mind the rough ride.
One fact overlooked is that Dodge Engineers are certain that if they had more time to dial in the Viper that day, they would have shaved at least another 5 seconds off of the lap record.
I'm sure Chevrolet would like the record back... They'll have to step it up though. A set of tires won't be enough to beat the improved and revised (revised gear ratios) 2010 ACR, which is projected to be able to run sub-7:10 laps at the Ring.
If you watch the video of the ACR's hot lap around the ring, you see that in many short stretches and on every long straight, the engine is on the rev limiter. Simply not enough gear... You'll also see the driver is not pushing it quite as hard as he could, lifting at times and missing shifts.
A link to the video is below. Just remember, this is almost a two year-old record... When Dodge goes back in 2010 (scheduled to share the track with Ferrari in May), I expect to see lap times in the 7:07-7:09 range.
http://www.motortrend.com/av/features/112_0811_2009_dodge_viper_acr_nurburgring_record_video/index.htmlMy regards,
Widewing