[pharmd]

When your comparing you also need to realize where and when those times were achieved...a car that ran in late november at ATCO wont run the same times in GA in August...DA is your friend.

I would agree with LSxJunkie the GTO is a nice comparision as it the G8...unfortunately the GTO doesn't have the advantage of the LS3 and the G8 actually weighs more and no M6. Your gonna have to make rough estimates.

One thing about comparing 4th gens to 5th gens...Sure the weight will be more...there will be a host of launching issues d/t a new platform (suspension, wheels, tires etc), but although 5th gens are handicapped with more weight, you also have an LS3 and not an LS1. 500 rwhp cam only on a M6 LS3 is possible...no so on a LS1 and you've got 100hp more stock (if the old 10rwhp = 0.1) then the LS3 more than offsets the weight disadvantage of the 5th gen...not saying it has the capability of being a faster NA stock short block ride, but something to think about.