Toyo R888 vs. MPSC
10-06-2011, 05:43 PM
#16
Rennlist Member
Hankook RS-3 is an insanely fast "street" tire for the track. Better than the Star Specs, which is saying something. Too bad they don't make any rear sizes in 18" for us....
10-06-2011, 06:01 PM
#17
I just put a set of R888s on the GT3. In a morning starting out at 60 degrees they were fantastic. I beat my best lap time by a second. By the 4th session when it was 96 they were just greasy and I slowed 4 seconds a lap from the morning. They were also feathered badly when they got hot.
Last edited by 10 GT3; 10-07-2011 at 01:38 AM.
10-07-2011, 12:21 AM
#19
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Join Date: Jan 2011
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Personal experience shows the MPSCups work best HOT at 32 to 34 psi front and 36 psi rear. At 38psi rear you get loose. This is also in keeping with guidelines from Michelin. As others comment, forget using them in the rain or in cold temp's. Generally, IMO, the N spec 19" tires do not work as well on track as the 18" I ran on my '04 996 chassis. Too bad Michelin doesn't make 18" fitments for the 997 GT cars. Also, alignment and sway bar setting make a big difference in how they feel and wear. That's true of any tire, but especially on track in the GT cars. I have no presonal experience with the R888, buit based on others input, they are not as fast. The R888 is, however, cheaper.
Unfortunately, runing Hoosier R80/R100 slicks makes anything else second best. After all, the MPSCs and other R comp' DOT tires are really street tires.
Unfortunately, runing Hoosier R80/R100 slicks makes anything else second best. After all, the MPSCs and other R comp' DOT tires are really street tires.
10-07-2011, 01:34 AM
#20
Yes. I readjusted them every session. BTW, I noticed the hotter it got that I would slide with the tires colder/earlier in the session when they are at lower pressures. In the morning the car was really sticking with the fronts at 34 psi and the rears at 36 psi hot. Later afternoon when the rears were at 34 psi they were already sliding around. Quite simply, the compound just doesn't like heat. When it is cool, they are hard to beat. They also did not start feathering until the afternoon when they were noticeably overheating.
10-07-2011, 07:06 AM
#21
Rennlist Member
Yes. I readjusted them every session. BTW, I noticed the hotter it got that I would slide with the tires colder/earlier in the session when they are at lower pressures. In the morning the car was really sticking with the fronts at 34 psi and the rears at 36 psi hot. Later afternoon when the rears were at 34 psi they were already sliding around. Quite simply, the compound just doesn't like heat. When it is cool, they are hard to beat. They also did not start feathering until the afternoon when they were noticeably overheating.
What I do to adjust tires is sacrifice the first session and before the checkered flag come in hot and adjust. What most people do is adjust only after 2-3 laps, which toward the end of the session tires keeps building up heat and get slippery.
