On a few of the current topics:
- The question of comparing the SLR to the Z06 was done by myself to prove a point to Poverty a few months ago, and the numbers were nearly identical. The only major advantage had by the SLR was in straight-line speed, as around most tracks the cars were neck-and-neck. Certainly however, the SLR will outrun then Z06 in top-speed (207 versus 198 MPH, although I've heard of Z06s going well-north of 200 MPH), and the breaking distances are a bit split, but that comes down to the use of carbon and the big flap versus the more 'regular-grade' brakes on the Vette.
- Acceleration times, at least from what I have read most often are right around 3.6 seconds with a mid-range clutch-dump and full-runs to redline. Most 'average' folks who don't have a lot of experience with the T-56 or much less a small-block Chevy in general probably can expect times a few ticks higher, but even then, the differences between them and the SLR really are not that vast. Depends on the weather, the elevation, etc as to who would win there, IMO.
- Track times may be a bit different these days given the updated suspension that was placed under the Z06 this year. I believe damping rates were improved to better ride quality and to quash the 'twitchy' nature of handling at-the-limit, noted in the most-recent test of the Z06 by Car and Driver. One more time, its probably going to come down to the driver, the track, and what the weather is like...
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Either way, I'm not sure why there is anything to argue about here. Adding another 150 BHP to the Z06 is certainly going to spell trouble for the hyper-exotics out there, particularly when the car will still be available for half the price of an F430, a sixth of the price of a 722.
...Shooting for the Carrera GT, at least in my opinion, is a worthy benchmark. The good thing about the CGT was that Porsche had the balls to build a supercar the way they were meant to be: Derrived from race-spec performance pieces, enough luxury to keep most people happy, and best of all it did without a lot of the unnecessary crap found on other exotics...
Without the Ford GT on-sale in the US, we're pretty much without a full-production supercar of sorts. Granted, there is always the Saleen S7 and Mosler MT900S, but they aren't serviceable at several hundred dealers across the US, much like this Vette will be...