GeoJoe

Ran at Barber this past weekend with temps in the 20s and 30s all weekend. I try to level off around 27psi hot, but started in the 30s to try to avoid any issues. Ended up with a personal best lap time but also noticed these cracks on Pirelli DHs late in the day. Looks like this is the only one of the four. I'm guessing this one is done. Anyone else with this experience?




4k video here if your bandwidth can handle it. Turn it up!



Attachment 1351818

Veloce Raptor

Wayyyy too cold for those tires

Frank 993 C4S

They are all done! You were really chancing it on those tires at those temperatures plus you got very lucky. Don't run them under 40 deg F.

GeoJoe

Thanks guys.... noob move it seems. Now I know.

Frank 993 C4S

It's all good. Thanks for posting your experience. FWIW - Pirelli also warns about not letting tires freeze during transport.

Gofishracing

Lucky GeoJoe

KOAN

Tough this time of year. I did the same 3 years ago at VIR in late October. Those cracks can look nasty. This year, I brought the tires to the track ( 12 hr drive) in the back seat of my truck, and kept the trailer heated overnight with 2 small electric heaters. Mounted them in the morning, and I was good to go. But...what a PITA!

GeoJoe

Yeah, I guess so. I've been tracking for 5 yrs+, but this is my first year on slicks.

Sounds like a dedicated track guy here with a plan. I knew to keep an eye on them, which is how I noticed after the last session. Next time I'll take the set up to the warm hotel room with me.

disden

Were many people out driving? I was supposed to be there in my RS last weekend too, but a snow storm hit up here in Southern Indiana on Friday morning, The roads were awful, I couldn't get my trailer safely out. Just curious if many people showed up. The entry list was pretty full!

GeoJoe

A good crowd still showed up...prob half to 2/3 full. It was biting cold on Sat with the wind...better on Sunday. Here's a few laps chasing a Radical through traffic with tricky sun late in the day.

hughp3

consolidated

How do you like Pirelli DH's? Any thoughts compared to Hoosier R7 or Michelin Cup 2. I'm going to try take off DH's this year.

GeoJoe

Big thanks for the research here and I really appreciate the invite to AMP! I'm not a member (yet) and unfortunately my schedule is packed this weekend. Funny, we had a low of 15 degrees last weekend, got an inch of snow in Atlanta and this Sat it will be sunny and 61! Time to take out the boat.

I gave these slicks plenty of laps to warm up and checked PSI often. After a session I'd come into the paddock and then wait for another hour or so for my next session to start. During this time the tires would cool down considerably and I'd drive into the next session with what seemed like flat spots on all four. This would fade after a lap, but I'm wondering if this is when the crack developed on that one.

He also wondered why we need to run in this cold weather anyhow - did you tell him that we were all track-addicted and will do whatever it takes to go fast?

I really like the DH's, but only getting about 15 sessions on a set before they get loose... so that's about 3 track days. I don't have much experience comparing them to the Hoosiers, but the MC2 is so expensive for a new set that I'm going to beat up on the track. Although take-offs are so much cheaper, it seems harder to find a consistent source with the right sizes.

CosmosMpower

DH are better than R7, and WAYYY better than Cup 2's. They don't last long especially as takeoffs. They are really sticky for the first 3-4 HC's then start to fall off. I usually get about 15 sessions before they are dead. They break away more abruptly than DOT track tires but they have a lot more lateral and longitudinal traction.

consolidated

Thanks guys! I'd be very happy with 15 HCs.