18 michelin slicks and PSC18 on 997 GT2
11-25-2009, 02:54 PM
#16
Three Wheelin'
Definitely the MPSC is the fastest track tire that can be driven to and from the track. Keep in mind that they still make 265/345 with the full race compound, and they fit the wide body 997 with minor fender work.
Kumho V710, Hoosier R6/A6 and BFG R1 are DOT legal slicks, that should not be driven on public streets, although some people do.
The Toyo R888 cannot produce the same g forces I have produced with the MPSC.
emmo, you should not mix Cup slicks with non-Cup slicks. There is plenty of information about this in the GT3 Cup forum. I ran 265/345 MPSC and 240/270 GT3 Cup (blue) slicks on the 997 RS, same track same day, there was almost 5 seconds difference per lap.
I just tested fairly fresh (40 laps old) Hoosier A6 this past weekend at the same track, and fairly fresh Toyo R888. The R888 proved lower g forces than the MPSC, while the A6 gave me the best g-forces of all the tires I have tested, except the Michelin Blue Cup slicks.
The Michelin Cup Blue slicks offer a much greater level of grip, improve acceleration out of turns, turn speed and braking by a huge margin.
Kumho V710, Hoosier R6/A6 and BFG R1 are DOT legal slicks, that should not be driven on public streets, although some people do.
The Toyo R888 cannot produce the same g forces I have produced with the MPSC.
emmo, you should not mix Cup slicks with non-Cup slicks. There is plenty of information about this in the GT3 Cup forum. I ran 265/345 MPSC and 240/270 GT3 Cup (blue) slicks on the 997 RS, same track same day, there was almost 5 seconds difference per lap.
I just tested fairly fresh (40 laps old) Hoosier A6 this past weekend at the same track, and fairly fresh Toyo R888. The R888 proved lower g forces than the MPSC, while the A6 gave me the best g-forces of all the tires I have tested, except the Michelin Blue Cup slicks.
The Michelin Cup Blue slicks offer a much greater level of grip, improve acceleration out of turns, turn speed and braking by a huge margin.
and have you tried slicks on the new car?
11-25-2009, 04:20 PM
#17
Addict
Rennlist Member
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Turn 5 (hard left sweeper)
1.596 G 2007 GT3 RS on michelin slicks Blue 270/68R18
1.543 G 2009 430 Scuderia on 4 HC Hoosier A6 345/30R19 (11/2009)
1.516 G 2007 GT3 RS on michelin Sport Cups 345/30R19
1.433 G 2004 GT3 on Toyo RA-1 335/30R18
1.421 G 2009 430 Scuderia on 4 HC Toyo R888 295/30R19 (11/2009)
1.409 G 2009 430 Scuderia on old Hoosier A6 345/30R19 (8/2009)
Hairpin (tight hard right)
1.862 G 2007 GT3 RS on michelin slicks 270/68R18
1.605 G 2007 GT3 RS on michelin Sport Cups 345/30R19 (same day as the slicks, dropped 5 secs per lap switching tires)
1.352 G 2009 430 Scuderia on 4 HC Hoosier A6 345/30R19 (11/2009)
1.283 G 2009 430 Scuderia on old Hoosier A6 345/30R19
1.266 G 2009 430 Scuderia on 4 HC Toyo R888 295/30R19 (11/2009)
1.236 G 2004 GT3 on Toyo RA-1 335/30R18
Lap times:
1:47.132 secs - 2009 430 Scuderia on 4 HC Hoosier A6 345/30R19 (11/2009). This would have been a 1:46.457 but I caught traffic in the infield straight, preventing me to reach 136-138mph I was getting in that section, instead reaching just 119.9 mph.
1:47.830 secs - 2007 GT3 RS on michelin slicks 270/68R18
1:50.402 secs - 2009 430 Scuderia on 4 HC Toyo R888 295/30R19 (11/2009)
1:50.692 secs - 2009 430 Scuderia on old Hoosier A6 345/30R19
1:52.787 secs - 2007 GT3 RS on michelin Sport Cups 345/30R19 (5.1 secs slower than slicks, tested the same day)
1:53.173 secs - 2004 GT3 on Toyo RA-1 335/30R18
The Michelin GT3 Cup slicks have better grip than the Hoosier A6. When I compared the GT3 Cup slicks vs. MPSC, then A6 vs. MPSC on the GT3 RS, the Michelin GT3 Cup slick was close to 1 second faster on a 60 secs lap against the A6.
I have not run the Scuderia on slicks, as the car cannot use 18" wheels. Michelin is going to release 19" slicks next year for the GT3 and GT4 FIA classes, including a size that will be compatible with the Audi R8, GT3 Cup and F430.
05-16-2012, 04:57 AM
#18
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hi everybody, I finally made the test with the Michelin Slick on the 997 GT2. I got 24/64x18 in 282G compound, (Porsche Cup tire) and a 30/68 S8A in the rear.
Now the front was a huge step forward in braking and grip from the MPSC, but the era was not good on this car.
In my opinion, the 30/68 is an almost unused tire by racers or track day people, and it may lack development.
My only other choice at this point would be the rear Porsche Cup tire, 27/68 x18 in 331C compound.
Which was the worls Supercup Porsche tire and and is now also given to national carrera cup racer.
That is: the best tire Michelin has made for Porsche up to now.
The Michelin people I spoke to say it's not a matter of compound 7 - 8 or 9, it's just that this 331C tire has been developed for Porsche.
How this will go on a 997 GT2 with 250 Kilos and 150 HP more it's another story...
Anyway I'll wait for the France Michelin guy that is now in Brasil and almost surely I will then order the rear 27/68 in Porsche Cup compound.
Now the front was a huge step forward in braking and grip from the MPSC, but the era was not good on this car.
In my opinion, the 30/68 is an almost unused tire by racers or track day people, and it may lack development.
My only other choice at this point would be the rear Porsche Cup tire, 27/68 x18 in 331C compound.
Which was the worls Supercup Porsche tire and and is now also given to national carrera cup racer.
That is: the best tire Michelin has made for Porsche up to now.
The Michelin people I spoke to say it's not a matter of compound 7 - 8 or 9, it's just that this 331C tire has been developed for Porsche.
How this will go on a 997 GT2 with 250 Kilos and 150 HP more it's another story...
Anyway I'll wait for the France Michelin guy that is now in Brasil and almost surely I will then order the rear 27/68 in Porsche Cup compound.
Also does michelin provide slicks in 19" fitment ? because im stil undecided whether to go 19's or 18's.
thanks
