Me?
The 102y tire in driver front position (did not even rotate and driver front takes by far most punishment on track!) made it to mid 8th track day before very slight chording on the far outside (despite -2.9 camber which had been chording the 98y tires more frequently on the inside and middle). I bet it would easily avoid chording 10 days if rotated fronts after 5 days, but not sure about heat cycle issues past 8 days. Grip was great and this is just a way more robust tire in my experience as I continue to chord my back supply of 98y fronts in 4 days even with rotating after 2.
- Just finished my 4th track day (7 thirty min sessions today!) on the Porsche spec 102y fronts. I’m totally blown away how well it held up to the 98y. Compare this to my prior pic after only 3 days on 98y. Usually the 98y will chord for me after 4, and one time after 3 long days. I am confident the 102y will last 7 days to fully heat cycle out Without chording and without need to rotate! Maybe it’s not technically as fast with the larger grooves, and it is more $$, but It sure does hold up better.
- on a related note, this was my 7th day on the rear tires and they are now heat cycled out and quite greasy with a loose rear end.
Did you notice any handling differences between the 98Y and 102Y?The 102y tire in driver front position (did not even rotate and driver front takes by far most punishment on track!) made it to mid 8th track day before very slight chording on the far outside (despite -2.9 camber which had been chording the 98y tires more frequently on the inside and middle). I bet it would easily avoid chording 10 days if rotated fronts after 5 days, but not sure about heat cycle issues past 8 days. Grip was great and this is just a way more robust tire in my experience as I continue to chord my back supply of 98y fronts in 4 days even with rotating after 2.
I really didn’t. And if there was any difference it’s way less than the difference in grip after 4 track day’s on the tires anyway, so don’t expect like new tire handling after 5 days on tires regardless.
That is sort of what I was getting at. If the 102Y's last longer, that's great from an economy perspective. However, if there is a significant drop off after 5+ sessions, I'm wondering if the longevity is worth it. I guess that is sort of difficult to quantify though. You ran the tires for 8 sessions without any internal red flags so I'm assuming they were "good enough" as far as grip goes for sessions 5-8.
Have to draw a line on performance vs $ somewhere, or we wouldn’t even be taking about Cup 2 and would be running Hoosiers for 1-2 days and then replacing with new. The 102y are more expensive though, so you need to do more sessions to get your $ out also
The 102y tire in driver front position (did not even rotate and driver front takes by far most punishment on track!) made it to mid 8th track day before very slight chording on the far outside (despite -2.9 camber which had been chording the 98y tires more frequently on the inside and middle). I bet it would easily avoid chording 10 days if rotated fronts after 5 days, but not sure about heat cycle issues past 8 days. Grip was great and this is just a way more robust tire in my experience as I continue to chord my back supply of 98y fronts in 4 days even with rotating after 2.
GT350s and Mustangs in general do tend to understeer - just like every other car on the road. I would assume it would understeer a little more with bigger rear tires. Some road race guys swear by square setups for Mustangs. I don't mind some understeer. I think it's safe and I like safety, especially if I'm on a faster track.
