Orthojoe's track build journal
02-22-2015, 07:32 PM
#466
Yes for sure. Happened on all of my 3 cars. My mechanic was convinced I was over driving the cars and only time showed it's a 991 thing.
-3.0 all around. The insides of the fronts will still wear more than the outside, from braking.
I agree 100%. I am currently not street driving the car at all except to/from track, as I try and see how the Trofeo-Rs heat cycle. Still on first set.
02-22-2015, 07:38 PM
#467
Nordschleife Master
Thread Starter
02-22-2015, 07:48 PM
#468
I will. I have 9 track heat cycles on them as of now but also have around 700 miles of street driving (6 trips total, not sure if they count as heat cycles or not but probably so, especially the two 200 mile legs to/from COTA). I should still be able to compare them to the PSC2.
02-22-2015, 07:50 PM
#469
Burning Brakes
02-22-2015, 07:52 PM
#470
Three Wheelin'
I will. I have 9 track heat cycles on them as of now but also have around 700 miles of street driving (6 trips total, not sure if they count as heat cycles or not but probably so, especially the two 200 mile legs to/from COTA). I should still be able to compare them to the PSC2.
02-22-2015, 07:56 PM
#471
I posted that on a different thread. They are FASTER no doubt. Two full seconds at COTA and close to a second at the local 1.7 mile track (MSR).
I hope that is correct because I may be necessarily depriving myself of street driving but I'll sit tight with this set and then drive much more with the next set and compare (although the weather will be warmer to make good conclusions; ugh, I can't win).
I hope that is correct because I may be necessarily depriving myself of street driving but I'll sit tight with this set and then drive much more with the next set and compare (although the weather will be warmer to make good conclusions; ugh, I can't win).
02-22-2015, 08:01 PM
#472
Rennlist Member
Good point on heat cycled rears with fresh fronts.
02-22-2015, 10:00 PM
#473
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02-22-2015, 10:12 PM
#474
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The guys at Big O monitored tire temps when we were at Sonoma earlier this month. Temps were good/even across. Ben noticed that the car wanted to pull to the right under heavy braking, and the left front rotor was noted to be hotter than the right. I couldn't replicate the problem, though. It could be a driving style issue.
On the pulling check the pads are wearing even and no sticky piston, do a quick bleed on all 4 corners.
02-23-2015, 01:25 AM
#475
Nordschleife Master
Thread Starter
Interesting. Might be interesting pickup some caliper temp stickers and rotor paint (Brembo makes). Calipers should be around 285f max. Rotors int he 550c range in the hot pits w/o cool down. The red paint shouldn't be turning white on the vanes, if so, too hot. On face is Ok. PFC pads right? I think these pads are pretty hot.
On the pulling check the pads are wearing even and no sticky piston, do a quick bleed on all 4 corners.
On the pulling check the pads are wearing even and no sticky piston, do a quick bleed on all 4 corners.
02-23-2015, 09:29 PM
#476
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The guys at Big O monitored tire temps when we were at Sonoma earlier this month. Temps were good/even across. Ben noticed that the car wanted to pull to the right under heavy braking, and the left front rotor was noted to be hotter than the right. I couldn't replicate the problem, though. It could be a driving style issue.
Interesting. Might be interesting pickup some caliper temp stickers and rotor paint (Brembo makes). Calipers should be around 285f max. Rotors int he 550c range in the hot pits w/o cool down. The red paint shouldn't be turning white on the vanes, if so, too hot. On face is Ok. PFC pads right? I think these pads are pretty hot.
On the pulling check the pads are wearing even and no sticky piston, do a quick bleed on all 4 corners.
On the pulling check the pads are wearing even and no sticky piston, do a quick bleed on all 4 corners.
02-23-2015, 09:49 PM
#477
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Now this is interesting. Why would the temp difference be so significant? If it's not a mechanical issue or track configuration, it may be a case for turning stability control off. I remember on e90 M3s, stability control compensated for oversteer by braking outside front wheel, which caused caliper temp differentials similar to this one. This was detected when someone logged brake pressure per wheel, which M3 allows via canbus. Would be interesting to do something similar with GT3 - maybe stability control is more involved than we think.
02-24-2015, 01:54 AM
#478
Nordschleife Master
Thread Starter
Now this is interesting. Why would the temp difference be so significant? If it's not a mechanical issue or track configuration, it may be a case for turning stability control off. I remember on e90 M3s, stability control compensated for oversteer by braking outside front wheel, which caused caliper temp differentials similar to this one. This was detected when someone logged brake pressure per wheel, which M3 allows via canbus. Would be interesting to do something similar with GT3 - maybe stability control is more involved than we think.
02-24-2015, 07:00 AM
#480
Like you I'm pretty track-oriented (32-37 days per year) but still not selling the Spyder (love it too much)! But when I buy another Porsche it will be a GT3 or GT4 for sure... not a 981 Spyder.
Speaking of rotor and caliper temps, I've measured as high as 590-ish on rotors and 430-ish on calipers. No, I didn't boil any fluids (Motul 600) but 987 rotors and calipers are still too small.