Leonidae
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- GTP_Leonidae_MFT
(from racingflix.com, by Nuke61)The PistonHeads article gives what appears to be a direct quote. The so-called "update" is just an article -- notice that Mizuno was not quoted. What he was *quoted* as having said is very clear, 'We used cut slick tyres'. What you posted is NOT a quote of Mizuno, other than he said "real world" -- everything else in the sentence is what the *writer* wrote as an interpretation. If the article quoted Mizuno as saying, "we did not use cut-slicks, because that is not real world" that would be one thing, but to only quote "real world" isn't much proof.
In any case, I think it's possible that with the OEM tires the GTR could have run that time, because tires can make a huge difference in track times. What I've never seen anyone talk about so far is the actual tires used, so I looked up the specs of the GTR tires and compared them to other tires.
The Z06 OEM tires are Goodyear Eagle F1 Supercar EMT tires that have a treadwear rating of 220.
As far as I can tell, the RE070A's that will be OEM on the GTR are just the regular RE070's with a different tire size, although it's possible that they will be even softer than the RE070's. How soft are the RE070's? They have a treadwear rating of 140.
As a point of reference, Nitto NT555RII's tires have a treadwear rating of 100. So if I'm correct, the GTR tires will be close to being as soft/sticky as the NT555RII's -- with a very short tread life compared to the Goodyears.
As another point of reference, the Pilot Sport Cup tires have a treadwear rating of 80, and as 'Ring times show, the cars that have used them have much better times than when using "normal" OEM tires.
So it's possible that the RE070A's have a treadwear rating even lower than the 140 that the RE070's have. Even if they don't, the RE070's are very sticky tires with tire life that you would expect of sticky tires -- shorter than for most other tires. I think I may have found the real explanation for why it's possible for the GTR to have run that time in production trim, right down to the tires. Keep in mind that the tires could have been shaved, heat cycled and siped, but in my opinion, that's still production and OEM.
Thus, we could say that these new tyres, that have been designed specifically for GT-R only, have better grip than your average runflats. I'm not sure if his speculation is even near the mark, but he knows his stuff usually.