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The Mercedes GT R and I believe the GT2RS and the .2 GT3RS have also some special sauce MPSC2 N2 tire..
All the wear ratings are the same, but even the SAME spec tires wear different part numbers.
What do we know, besides load rating in terms of how the tires are faster?
Is it that there is more of the faster rubber across the tire?
So the more durable compound inside of the tire is narrower and the faster compound on the outer edge is wider on N2 spec tires or the?
Maybe on the qualifying, Ring special tire its all the same, faster compound rubber?
Or perhaps the ratio of the different rubber across the width of the tire is the same but the compounds are formulated differently?
2014 and 2018 GT3 come with 245/35/20 Front and 305/30/20 Rear.
Both come with 1 spec. But yet, we know the .2 GT3 tire is much faster? Was it an N2 spec tire or was it the secret sauce tire?
We know that there are faster super duper secret sauce spec MPSC2 tires that I cant find any info on, but they are sold as an option on the Mercedes GT R, or according to some articles anyway.
I can't find any info on the Michelin website, or the Mercedes or Porsche websites about this quali / Ring wonder lap timer that beats the Pirelli Trofeo.
Curious to know if anyone here might have some insight into these tires because setup begins from the tire up.
No point in trying to setup a GT3RS and not make a change to the setup swapping to the N2 spec or the secret sauce tires.
These secret sauce tires could, for example explain the big camber on the Manthey car when after 18 sets of trial and error on MPSC2 N1 spec, I could not find any grip improvement between -2 Camber and -3.5 Camber.
Actually the more camber, the slower. I am not saying that it was the reason the car is so much faster because suspension was also changed and with that, tires work differently.
It’s no “secret sauce” tyre, but I’ve just tested the new Dunlop Race 2 against the Michelin N1 (new v new) on my RS at a GP track in my Tarmac Rally car.
I believe it’s quicker. Not by a lot, but it was quicker. It was also running between 10 and 15 degrees C hotter for the same lap stints which leads us to believe it is a softer compound and may in fact be a lot better in the wet.
I will be running the Dunlop in our next Targa Rally, so will be able to confirm in a few weeks, but I do like it.
Im going to call it early, but I think Dunlop may have pulled one out of the bag with this tyre - very different shoulder shape than we are used to seeing.
I forget who posted it, but recently it was said that '18 GT3 N1 compound was the same as N2....but since it's on the GT3, they just called it N1 (since previous was N0). For the GT2/3-RS, it's now called N2, but the compound is supposedly the same as N1 on '18 GT3. Then the special quali-compound will be available for GT2/3-RS.....hopefully also in 245/305 size for GT3 guys.
I remember seeing an article about the GTR having the option to get a special Cup 2 that was designed for the Z06. It was supposedly designed for just dry use. Can't remember where I saw it.
The Standard AMG GT-R sizes are 10mm less front and rear. But they used the larger and sticker corvette compound for the track cars.
I've not driven on a .1 spec cup 2 tire, but the .2 spec cup 2 tire is still nothing close to the corvette spec cup 2 tire. The tread depth alone is a significant difference.
As to the Dunlop comments, when I was in Germany at Leipzig, the factory Porsche driver said the Dunlop can be quicker then the Michelin, mostly course dependant, but the Michelin will take more abuse and still come back, where the Dunlop will fall off.
Ultimately, he said the fattest 20" tie at this time for our cars is the Pirelli Trofeo R's.
Best Regards,
Dave
A couple interesting tid bits from tirerack:
Corvette spec: 5.7 mm tread depth
GT3 spec: 7.2 mm tread depth
Images of Porsche version and then Corvette/GT-R version:
Trofeo's are fast but fall a part quickly and drop off after two track days. pretty toast and pricey given the performance. For cheaper I would rather run R7's because wear is the same but much better grip. The Michelin is the longest lasting track tire I have experience with IMO. I am going to go out to my garage what is on my 18 GT3.
The Z06 tires are Cup 2 run flats. I bet if they offer a different or more track worthy tire it is not a run flat and may be entirely different. I personally would call Michelin Motorsports to get an answer. I have have had good luck talking with these guys in the past. In the mean time I will ask one of my contacts the question.
Trofeo's are fast but fall a part quickly and drop off after two track days. pretty toast and pricey given the performance. For cheaper I would rather run R7's because wear is the same but much better grip. The Michelin is the longest lasting track tire I have experience with IMO. I am going to go out to my garage what is on my 18 GT3.
My thinking is the new Dunlop Race 2 is somewhere between the Cup 2 and Tropheo R.
Could be a great compromise on grip and longevity. Laterals were definitely up over the Cup2’s on our test day.
PRESS INFORMATION / Tuesday 6th March 2018 MICHELIN Pilot Sport Cup 2 tyres for the New Ferrari 488 Pista All the new Ferrari 488 Pista supercars which roll off the production line will be fitted with specially developed MICHELIN Pilot Sport Cup 2 K2 ultra-high-performance tyres; 245/35 ZR20 front and 305/30 ZR20 rear. Specifically designed for the Ferrari 488 Pista, the MICHELIN Pilot Sport Cup 2 K2 is the latest generation of Michelin’s road-legal track tyres. Compared to the MICHELIN Pilot Sport Cup 2 K1-marked tyre designed for the Ferrari 458 Speciale, it offers improved lap times by providing more grip and more sporty handling. It also provides drivers with a unique balance between safety and driving enjoyment making it suitable for everyday road use, as well as the demanding conditions on the racetrack. The co-development of these tyres took 14 months, and during this time the tyres were developed and fine-tuned in dynamic simulation sessions with Ferrari, to ensure the tyres achieved the characteristics demanded by Ferrari engineers for the new 488 Pista. The result was new tyres offering very high grip levels, consistent performance and excellent balance between front and rear. This extensive development process led to the production and testing of more than 1100 prototype tyres and included intensive track testing, with 1800km driven at Michelin’s Ladoux test centre in France and Fiorano and Nardo tracks in Italy. An innovative range of new technologies developed from motorsport are used in the tyres, including multi-compound technology where different rubber compounds are used on the inner and outer sections of the tread. Of these one “special grip” compound, ensures high and consistent grip levels in a variety of weather conditions. The MICHELIN Pilot Sport Cup 2 features two innovations: - An adapted tread design, with increased sidewall stiffness - to absorb transverse forces and allow faster cornering, - A bespoke aramid belt - optimising the ease of control. Pierre Chaput, tyre Designer for the Ferrari 488 Pista, declared: "Ferrari's ambitions pushed us to develop very high-tech tyres for the 488 Pista, where the grip limits are significantly increased compared to the 458 Speciale. The goal of improving lap times was all the more challenging as the Pilot Sport Cup 2 needed to remain easy to control so the 488 Pista driver could fully enjoy driving pleasure, whatever his skill level. With the help of simulation tools, widely used on this project, we have been able to develop a tyre whose contact patch is maximised under all circumstances, while guaranteeing safety performance, such as aquaplaning". Ends… Michelin Press Office: +33 145 66 22 22 Michelin, the leading tire company, is dedicated to enhancing its clients’ mobility, sustainably; designing and distributing the most suitable tires, services and solutions for its clients’ needs; providing digital services, maps and guides to help enrich trips and travels and make them unique experiences; and developing high-technology materials that serve the mobility industry. Headquartered in Clermont-Ferrand, France, Michelin is present in 170 countries, has 111,700 employees and operates 68 production facilities in 17 countries which together produced 187 million tires in 2016 (www.michelin.com
Interesting that the Pista shares the same size with GT3. Who is gonna try them first?? I know Porsche strenuously recommends only N-rated rubber for its cars, but maybe the K2 would work?? Or maybe the K2 has same compound as N1 without the specific 911 tuning?
Cup2 ZP (special road registration needed for MB GT R and Z06)
Cup2 R (the new best Cup2 tire - which was mounted on the GT2RS in Hockenheim (and i THINK also on the NOS car. but whoopsy is well informned and the .2GT3RS doing "just" 10sek slower... mhh. maybe 6.47 where really Cup2 N2...)
a dedicated Cup2 for the Pista (maybe the R) is also in development.
did i get something wrong? please correct in case.
03-19-2018, 05:17 PM
Michelin Pilot Sport Cup 2 N0 N1 N2 + secret sauce quali spec
