thanks for posting, what were the actual numbers for each?
6.94 - 12C
6.94 - 488
6.64 - 650S
we've VBox'd approx 150 individual cars over the last couple of years, all following the exact same protocol and location. It's become a small tradition of sorts. Quite nice when guys from different clubs, or even sometimes different tuners will come out, curious to run their cars and see where they stand in our little database.
We try to be as scientific as possible, but of course you can't avoid variance due to temps-- a car run in January will have an obvious advantage over a car run in April (height of our summer). But many people will "re-take" when conditions are ideal, so there's multiple attempts, also after a round of mods.
I wish I had a buck for every time someone shows up with their car after spending sh*tloads of money on mods... only to find very modest gains versus stock. and in some cases, their cars actually being slower! But all in good fun, and people have come to realize that dyno numbers don't always translate as much to real world performance as one would like to believe.
There are some interesting patterns too we've found from doing this so often. Certain makes and models simply do not live up to the performance hype you find in the press. Or at least to how said cars perform elsewhere. Worst offenders are the V10 M5's and 458's. We think it must be our fuel.
The 12C/650/488 are the only stock cars that have broken the 7-second barrier for us so far. Of course the tuned FGT's and GTR's are into the 5's, but we're talking stock cars here.
Interestingly, the Aventador and F12 haven't been able to break thru to the 7's yet... But there's an SV that still being run-in, and if any (stock) Lambo should do it, that should be the one...