Road Atlanta Review
06-09-2011, 11:37 AM
#16
Thanks for the answers
Just a point of clarification, in your above comment, are you referring to the 19" OE MPSC+ tires or are you referring to real 18" MPSCs?
If you were running with the 2 cars that you mentioned and were able to keep up in the corners, then that is a pretty good endorsement.
Your turn-in and highway driving comments, combined with by own 5 minute drive home on these tires after getting them mounted experience, I think has me convinced that basically the tire's sidewall is not as stiff (in addition to the extra tread depth) as the OE Cup+ tires (thus the comfort factor / turn-in feel) and yet the outer tread compound, once set, seems to hold at least as well as the OE Cup+ tires but does not have the stick of the real MPSC (which would be expected).
I will experiment with different psi settings front and rear to see if I can improve the 'feel' thing. It maybe that a slightly higher front hot psi (maybe not) will improve turn-in - or it may just be a tire with a softer sidewall but with good grip once you get there - if this is the case, higher front camber settings will likely help a lot.
What is your front and rear camber settings?
Great feedback - thanks.
Paul
Last edited by 997gt3north; 06-09-2011 at 01:17 PM.
06-09-2011, 11:47 AM
#17
Intermediate
Thanks for the answers
Just a point of clarification, in your above comment, are you referring to the 19" OE MPSC+ tires or are you referring to real 18" MPSCs?
If you very running with the 2 cars that you mentioned and were able to keep up in the corners, then that is a pretty good endorsement.
Your turn-in and highway driving comments, combined with by own 5 minute drive home on these tires after getting them mounted experience, I think has me convinced that basically the tire's sideway is not as stiff (in addition to the extra tread depth) as the OE Cup+ tires (thus the comfort factor / turn-in feel) and yet the outer tread compound, once set, seems to hold at least as well as the OE Cup+ tires but not at the stick of the real MPSC (which would be expected).
I will experiment with different psi settings front and rear to see if I can improve the 'feel' thing. It maybe that a slightly higher front temp (maybe not) will improve turn-in - or it may just be a tire with a softer sidewall but with good grip once you get there - if this is the case, higher front camber settings will likely help a lot.
What is your front and rear camber settings?
Great feedback - thanks.
Paul
Just a point of clarification, in your above comment, are you referring to the 19" OE MPSC+ tires or are you referring to real 18" MPSCs?
If you very running with the 2 cars that you mentioned and were able to keep up in the corners, then that is a pretty good endorsement.
Your turn-in and highway driving comments, combined with by own 5 minute drive home on these tires after getting them mounted experience, I think has me convinced that basically the tire's sideway is not as stiff (in addition to the extra tread depth) as the OE Cup+ tires (thus the comfort factor / turn-in feel) and yet the outer tread compound, once set, seems to hold at least as well as the OE Cup+ tires but not at the stick of the real MPSC (which would be expected).
I will experiment with different psi settings front and rear to see if I can improve the 'feel' thing. It maybe that a slightly higher front temp (maybe not) will improve turn-in - or it may just be a tire with a softer sidewall but with good grip once you get there - if this is the case, higher front camber settings will likely help a lot.
What is your front and rear camber settings?
Great feedback - thanks.
Paul
No problem, Paul!
I was comparing to the OEM 19" MPSC+.
My camber settings are 2.1 Front and 1.8 Rear. I told the shop to set it up for 60% track 40% street use. Great idea - maybe I will experiment with more negative next time.
Definitely let us know your feedback on these tires too as you experiment!
- Steven
06-09-2011, 12:03 PM
#18
Rennlist Member
Thread Starter
Steven's comments are consistent with what I "think" I experienced at the track. I'm the guy who was running the MPSC's. My set-up is essentially identical to Steven's (we both had the alignment done at Goldcrest) and the car's were relatively equal in performance over the weekend. My fastest time over the weekend was 1:40 and without traffic, could turn pretty consistent times in that range. As it got hotter and the tires a little more greasy, I lost about 1.5-2 sec a lap.
I have a set of SuperSports, but, haven't really tried them out yet. They are on my OEM wheels and I don't really drive on the street, so, haven't gotten too much feel for them yet.
I have a set of SuperSports, but, haven't really tried them out yet. They are on my OEM wheels and I don't really drive on the street, so, haven't gotten too much feel for them yet.
06-09-2011, 12:32 PM
#19
No problem, Paul!
I was comparing to the OEM 19" MPSC+.
My camber settings are 2.1 Front and 1.8 Rear. I told the shop to set it up for 60% track 40% street use. Great idea - maybe I will experiment with more negative next time.
Definitely let us know your feedback on these tires too as you experiment!
- Steven
I was comparing to the OEM 19" MPSC+.
My camber settings are 2.1 Front and 1.8 Rear. I told the shop to set it up for 60% track 40% street use. Great idea - maybe I will experiment with more negative next time.
Definitely let us know your feedback on these tires too as you experiment!
- Steven
I also meant to add that I thought your shop stiffening the front bar was a good setup idea while your speed grows - some of the fastest drivers set the car up that way as it really inspires confidence about getting hard on the throttle during trackout.
My setup is -2.7f, -2.3r with upgraded GT2 bar on soft in rear and front bar 1 from stiff. I may even dial it back to -2.5f, -2.1r for better temps across the rear of the tire (even on R6s)
06-09-2011, 02:24 PM
#20
Intermediate
That's a good setup for your needs from my experience. You may want to try just increasing the front camber as it is the rears that really wear the inside edges. The front of the car is so light in comparison that more negative camber is almost 'free' as it doesn't really increase wear at all in the front.
I also meant to add that I thought your shop stiffening the front bar was a good setup idea while your speed grows - some of the fastest drivers set the car up that way as it really inspires confidence about getting hard on the throttle during trackout.
My setup is -2.7f, -2.3r with upgraded GT2 bar on soft in rear and front bar 1 from stiff. I may even dial it back to -2.5f, -2.1r for better temps across the rear of the tire (even on R6s)
I also meant to add that I thought your shop stiffening the front bar was a good setup idea while your speed grows - some of the fastest drivers set the car up that way as it really inspires confidence about getting hard on the throttle during trackout.
My setup is -2.7f, -2.3r with upgraded GT2 bar on soft in rear and front bar 1 from stiff. I may even dial it back to -2.5f, -2.1r for better temps across the rear of the tire (even on R6s)
Great info, thanks!!
06-09-2011, 05:39 PM
#21
Drifting
Join Date: Jul 2009
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Don't have the capability yet. My "list" of upgrades in order are:
1. Toe links/bump steer - will be installed next Tuesday at Goldcrest
2. GT2 seats, roll bar, harness and HANS (July/August)
3. Traqmate and video (Christmas, if my wife hasn't thrown me out of the house)
4. Buy RS and start over
1. Toe links/bump steer - will be installed next Tuesday at Goldcrest
2. GT2 seats, roll bar, harness and HANS (July/August)
3. Traqmate and video (Christmas, if my wife hasn't thrown me out of the house)
4. Buy RS and start over
06-10-2011, 10:24 AM
#25
Race Director
SNIP- I'm convinced that the R888 is a compromise tire for the GT3. After running the Sport Cups this weekend and the R888's my previous 2 DE's, I can say that there is a noticeable difference in grip and performance. The price difference is worth it IMHO. Kudos to Michelin...
Just so I am not misunderstanding you.....since you have experience with both R888 and MPSC on the same car, same wheels and same track.....you are finding that the MPSC N spec tires are better in grip and longevity than the R888? Although the MPSC cost a few hundred more than the R888 you say the cost is justified?
thanks so much for the feedback!
06-10-2011, 03:38 PM
#26
Rennlist Member
Thread Starter
Mike, as much as I hate to admit it, IMHO, there is a signinficant difference in grip and longevity between the R888 and MPSC on the GT3. And believe me, I really didn't want to believe it as that makes Peter, Randy, et al. right 
So, while I can't speak for the other P-car models, I will say that on my car, the difference is noticeable and the MPSC's are worth the difference in price. Luckily, I've been trolling on a couple of other forums and have found used tires that are holding up admirably.
Hope that helps...
ldj
So, while I can't speak for the other P-car models, I will say that on my car, the difference is noticeable and the MPSC's are worth the difference in price. Luckily, I've been trolling on a couple of other forums and have found used tires that are holding up admirably.
Hope that helps...
ldj
06-10-2011, 04:14 PM
#27
Race Director
Mike, as much as I hate to admit it, IMHO, there is a signinficant difference in grip and longevity between the R888 and MPSC on the GT3. And believe me, I really didn't want to believe it as that makes Peter, Randy, et al. right
So, while I can't speak for the other P-car models, I will say that on my car, the difference is noticeable and the MPSC's are worth the difference in price. Luckily, I've been trolling on a couple of other forums and have found used tires that are holding up admirably.
Hope that helps...
ldj
So, while I can't speak for the other P-car models, I will say that on my car, the difference is noticeable and the MPSC's are worth the difference in price. Luckily, I've been trolling on a couple of other forums and have found used tires that are holding up admirably.
Hope that helps...
ldj
