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Help Reading Tires
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Air-Cooled Goodness
 
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Help Reading Tires - October 28, 2013, 05:44 PM

There hasn't been a suspension tech present at the track to consult so I'm looking for ideas. From what I've read it looks like maybe hot or cold tear? Pressure was set a 22-23psi and its from yesterday at Shenandoah so temps were around 58.
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October 28, 2013, 05:57 PM

Looks kind of like what I was getting. I think the consensus on mine was that it was just cold outside and you were going to get cold tearing once you get that late in the season. That seems to have played out so far as I never changed anything and my tire wear was fine once it warmed back up.

Last edited by big_sur; October 28, 2013 at 05:59 PM..
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October 28, 2013, 06:22 PM

Did you use tire Warmers? It is cold tear. The tire does need to get up to temp.


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October 28, 2013, 08:52 PM

This time of year you will get that due to the weather. Even with warmers your tire will cool down dramatically on the track and will not be in the optimal heat range and will tear. Learned that last year at the end of the season on Shenny as well.


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October 28, 2013, 08:58 PM

Yes, I ran warmers. I was assuming cold tear since it was cold out, but I had similar tear at shenny a month ago on a 70 degree day. Would it be wise to drop below 22psi or just call it quits for the year?


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October 28, 2013, 09:16 PM

Find out what the recommended hot pressure is for those tires, set tire cold a couple of psi over hot temp psi, check your tire warmers to ensure they are hot enough, leave tire warmers on for at least an hour, once you know the tires and rim are at optimal temperature release the extra pressure to recommended hot pressure. This way you're not adding in cold air either. Then pray that it works


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October 28, 2013, 09:31 PM

Shenandoah is not a good track during cold weather as far as tire wear is concerned. When CCS raced there years ago, even in the summer tires would never really get a lot of heat in them. But traction wasn't an issue because the pavement was new and grippy.


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October 29, 2013, 08:26 AM

2 weeks ago we raced at Jersey with a high of 60 degrees. Most with the GPAs ran them at 19/20 psi off the warmers. I would drop it a few degrees since Shenny won't heat them up as much


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October 29, 2013, 09:20 AM

Just a thought, since it looks like most of the tearing is on the left. Maybe try to re-check the wheel alignment?
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October 29, 2013, 11:01 AM

Thanks for the tips guys. For some reason I was worried about going lower than 22psi since the pressure sheet that they gave me with the tires recommended 30psi hot, which never seemed right to me. The front was wearing beautifully.

Brian, the reason the tear is mostly on the left is because its a left-hand track.


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November 1, 2013, 12:57 PM

Quote:
Originally Posted by BrianRacerboy View Post
Just a thought, since it looks like most of the tearing is on the left. Maybe try to re-check the wheel alignment?
Nah - that's just Shenny.

It's up to 22 turns if they are running the full course with only 4/5 being rights and those aren't hard on the tires turns. One you're practically coasting.



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November 1, 2013, 06:28 PM

Ive seen that alot with Dunlop even in warm temps.Not much so with the slicks.Thats a hard tire to use for cooler temps.


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November 3, 2013, 04:16 PM

Try 20 on the rear.

Last edited by Umayr; November 3, 2013 at 04:40 PM..
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November 3, 2013, 05:53 PM

Sorry I needed to add that you should try 20 on the rear, hot off the warmers. Im guessing those are the gpa's not the q2/q3's . dunlops tires have a much stiffer carcus so yeah you can drop the pressure down more than like lets say a set of michelins. and i say 20 because of the temps being around 58 outside. thats a cold track. you need more heat in those tires so i would recommend 20. watch the pressure throughout the day too. I dont know your pace, but 1 psi can make a big difference.
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November 4, 2013, 08:31 AM

Yep all these guys nailed it spot on. I am really liking all the new Dunlops but they are VERY particular about temp and pressure.


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