991 GT3 vs: 997 GT3 Cup car - VIDEO
02-01-2015, 12:27 AM
#76
Nordschleife Master
When you guys say 'slicks', are you talking about real racing slicks like on the cup car, or are you talking about semi-slick tires like the R6? I don't know what the time difference is between a real racing slick vs the R6, but I can put out some objective numbers on tires that I do have data on and let people come to their own conclusions
1) On a boxster spyder, NT01 tires will start to break away at 1.3 Gs
2) on a boxster spyder, hankook Z214 tires (semi slick) will start to break away at 1.45Gs
3) on a 991 GT3, MPSC2 will start to break away at 1.35Gs
The data shows that the MPSC2 is a touch better than the NT01, but not at semi slick level grip. The confounding variable here is that data from a boxster spyder isn't apples to apples with a 991 GT3. Can one assume that a GT3 can inherently hold slightly more Gs than a spyder? If MPSC2 last longer than NT01, it's a big win.
1) On a boxster spyder, NT01 tires will start to break away at 1.3 Gs
2) on a boxster spyder, hankook Z214 tires (semi slick) will start to break away at 1.45Gs
3) on a 991 GT3, MPSC2 will start to break away at 1.35Gs
The data shows that the MPSC2 is a touch better than the NT01, but not at semi slick level grip. The confounding variable here is that data from a boxster spyder isn't apples to apples with a 991 GT3. Can one assume that a GT3 can inherently hold slightly more Gs than a spyder? If MPSC2 last longer than NT01, it's a big win.
02-01-2015, 12:56 AM
#77
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On my 997.2 RS I went down the slippery slope from the street tires to Pirelli Trofeos to Hoosier R6 to Yokohama race slicks. I have a good understanding of the times each will provide.
02-01-2015, 10:20 AM
#79
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When you guys say 'slicks', are you talking about real racing slicks like on the cup car, or are you talking about semi-slick tires like the R6? I don't know what the time difference is between a real racing slick vs the R6, but I can put out some objective numbers on tires that I do have data on and let people come to their own conclusions
1) On a boxster spyder, NT01 tires will start to break away at 1.3 Gs
2) on a boxster spyder, hankook Z214 tires (semi slick) will start to break away at 1.45Gs
3) on a 991 GT3, MPSC2 will start to break away at 1.35Gs
The data shows that the MPSC2 is a touch better than the NT01, but not at semi slick level grip. The confounding variable here is that data from a boxster spyder isn't apples to apples with a 991 GT3. Can one assume that a GT3 can inherently hold slightly more Gs than a spyder? If MPSC2 last longer than NT01, it's a big win.
1) On a boxster spyder, NT01 tires will start to break away at 1.3 Gs
2) on a boxster spyder, hankook Z214 tires (semi slick) will start to break away at 1.45Gs
3) on a 991 GT3, MPSC2 will start to break away at 1.35Gs
The data shows that the MPSC2 is a touch better than the NT01, but not at semi slick level grip. The confounding variable here is that data from a boxster spyder isn't apples to apples with a 991 GT3. Can one assume that a GT3 can inherently hold slightly more Gs than a spyder? If MPSC2 last longer than NT01, it's a big win.
On equal tires, I'd expect the GT3 to have somewhat more grip than the Spyder, based on what appears to be a superior suspension and superior aero, along with PTV+, though the Spyder does have a weight advantage. There's also the debate about mid-engine vs rear-engine, and I suspect that mid-engine has a (small?) edge there.
Would be interesting and telling to see what your lap time is on that track in the Spyder with SC2 tires, though as noted, the lap time is affected by track conditions (and many other variables).