Quote:
Originally Posted by bruce.augenstein@comcast.
I read your initial post and followups by you and Swamp with both interest and admiration.
What I am pushing back on is the tendency for Swamp to view this information as somehow important in terms of determining whether Nissan has under-rated the GT-R or not. Previous to this string, he was fairly definitive about it. However, my feeling is that unless you have a significant number of extremely powerful cars in a general weight range, each with very good balance and state of the art awd technology that can separately and specifically apply power to each wheel, you don't have as complete a data base as you need.
The closest thing we have is the Porsche Turbo, which is a sophisticated machine, but has lousy balance as a street car on track. The GT-R narrowly outperforms the Porsche at the 'Ring (458 seconds instead of 460) in spite of having around an eight percent poorer showing in the power to weight department. This is almost certainly due to its superior handling (according to early tests) and superior transmission.
Your numbers show it to be an extreme flyer, but you pretty much don't have enough data in the data base that's comparable enough to actually come to a good conclusion. Capische?
Having said all that, I believe you (and Swamp) have done terrific work.
Bruce
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the 997TT
never ran a 7:40...ever...that was a factory estimate reported by Motortrend...
7:49 Walter
7:54 Horst
both documented and on PSC's
the actual wt of the 997TT (6 speed) when weighed by Excellence was 3377 lbs...almost 500 lbs lighter...and less driveline loss...
it has 16% more torque and the band is 50% wider...
the GTR is
not under-rated, nissan claims 473 sae/428 lb ft...
they have said it will need tweeked to get 480 sae...
the dyno numbers are bogus...
to get 480 with 20% loss you'ld need 600 HP...no way
there is no way the GTR will outrun the 997TT...
I can't wait for some cars to be sold and independently tested...
7:54 --- 156.456 km/h -- Porsche 997 Turbo, 480 PS/1620 kg (sport auto 06/07)
http://www.supercars.net/PitLane?vie...D=2&tID=126501
http://www.youtube.com/watch?v=EPvBu...e=user&search=
24. Porsche 997 Turbo 7:49.0 Walter Rohrl using Michelin Pilot Sport Cups
http://www.fastestlaps.com/index.php...=458d68820555a