Quote:
Originally Posted by dogbone
It just depends on the tire and the situation.
If a person drives their car to the track, runs on Pilot Super Sports and it's 70ºF in the AM, then the brakes are already warm from the drive to the track and PSS don't need any warm up. Even if that person ran a more performance oriented tire that needs some warm up, the brakes would already be warmed up so they could mostly concentrate on the tires. The brakes would just need a couple solid presses.
If a person trailers their car, runs on an R1S or a hard compound slick and it's 48ºF at the start.....different situation. Better warm all that stuff up.
Later in the day, once the car has been run on track, I don't need two laps of warm up. Even after long rest periods, the brakes come up to temp very quickly, so I concentrate on getting some heat into those tires and I'm good to go after one lap.
Also, with 15-30 other cars on track with you, you can't just be dragging your brakes and over-slowing before a turn or jamming your brakes suddenly on the middle of a straight with no warning while trying to warm things up. You'll cause havoc out there. So, it's better to be patient, and at least for that first session of the day, get two laps in.
Anyway, I'm only saying all this so that people don't just jump on the gas with a tire like an R1S or a Michelin slick when it's cold because I can tell you from firsthand experience what happens. The rear of the car steps out, and you ain't getting it back. Spin City. And at a track like Buttonwillow, aero won't help save you because the final turn onto the straight is around 60mph, so the aero isn't doing much.
Once those R1S's warm up though-----life is good. 
I would love to get a taste of some East Coast tracks (and COTA). But I want to do stuff like that in my car, so-----do I smell ROAD TRIP?!! |
After some reading about these tires it does look like they are very sensitive to ambient temp., ground temp, tire pressure, ect.
Here are some observations from another forum race team member about BFG R1 S:
"There are several factors to consider. Er have not used Hoosiers on our car but can give a lot of feedback on the bfg. Here are the things to be aware of when using the Bfg r1s
1. They love heat and it is very difficult to over heat them.
2. They are optimal with ambient temps above 65-70 degrees with hot ground temps
3. They have no grip in colder temps as we found out in new jersey at the pro. Ambient temps were 50-58 degrees on Saturday and 37-45 degrees on Sunday.
4. They must be scrubbed in before they come to life. They have absolutely no grip when new/sticker. Either put a couple runs on them in a test course and let them heat cycle or take them for a drive and get them up to temp and let them heat cycle
5. They rarely overheat or require cooling.
Since we switched we have rarely used our sprayer and that is in south Florida weather typically 80-100 degrees with two drivers and usually about 5-6 runs each driver on a 40-65 sec course
This is on a bsp s2000 using 275/35/18 on 18x11 wheels"
I know,different car, much lighter, but r-compound characteristics should be the same I think.