Interesting marks on tires from Autocross...
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Interesting marks on tires from Autocross...
Guys,
My first time to autocross. Up til now, my car has not been trustworthy, and maybe wouldn't pass tech. I roadraced motorcycles some years ago, I've always wanted to autocross. Things got in the way.
I AX'd on plain jane street tires (Bridgestone Potenzas), and it was my first time, and I was the 6th fastest car!
This one section had a (relatively) high speed left, followed by a hairpin left. On these tires, this whole left turn area was a complete slide-fest. This one particular time through there I sort of plowed sideways into the hairpin area. Not like a drift, but more like a snow plow. Neglecting which way is the fastest way through a corner (I don't need a lesson), the right rear had a vibration through it that I've never experienced in a car before. See the attached pictures to see what the result of this vibration was.
The course was mostly left turns, and this is the only tire that this happened to. I think these marks will wash / wear off. I don't care about these marks, the car is not a daily driver.
I'm just curious if anyone has had this happen to them, or seen this before. If the tire is damaged internally, I don't want to AX it anymore, I'd hate to blow it and damage a rim.
Thanks.
BTW. The grip of the tires was not good, but I'm not intending on trying to be the king of the hill autocrossing. I'm just having a bit of fun, so if I kill the tires, I don't care.
My first time to autocross. Up til now, my car has not been trustworthy, and maybe wouldn't pass tech. I roadraced motorcycles some years ago, I've always wanted to autocross. Things got in the way.
I AX'd on plain jane street tires (Bridgestone Potenzas), and it was my first time, and I was the 6th fastest car!
This one section had a (relatively) high speed left, followed by a hairpin left. On these tires, this whole left turn area was a complete slide-fest. This one particular time through there I sort of plowed sideways into the hairpin area. Not like a drift, but more like a snow plow. Neglecting which way is the fastest way through a corner (I don't need a lesson), the right rear had a vibration through it that I've never experienced in a car before. See the attached pictures to see what the result of this vibration was.
The course was mostly left turns, and this is the only tire that this happened to. I think these marks will wash / wear off. I don't care about these marks, the car is not a daily driver.
I'm just curious if anyone has had this happen to them, or seen this before. If the tire is damaged internally, I don't want to AX it anymore, I'd hate to blow it and damage a rim.
Thanks.
BTW. The grip of the tires was not good, but I'm not intending on trying to be the king of the hill autocrossing. I'm just having a bit of fun, so if I kill the tires, I don't care.
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OK, I'll try that next time. I just got through reading about chalking the tires and adjusting the air pressures based on how much chalk wears off.
But the marks are very curious ... I think I could wash the tires and that stuff would come off. It comes off with my fingernail. Which would tell me that the tires are not damaged internally. At least that would be my opinion. But wanted to see if you guys knew otherwise.
I haven't washed the tires because I just put the car away and took the pictures when I got home.
But the marks are very curious ... I think I could wash the tires and that stuff would come off. It comes off with my fingernail. Which would tell me that the tires are not damaged internally. At least that would be my opinion. But wanted to see if you guys knew otherwise.
I haven't washed the tires because I just put the car away and took the pictures when I got home.
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The car had a lot more left. If I could have figured out the meaning of the cones, and had confidence from gate to gate (to not get lost), I could have broke into the 60's I think. That would've put me about 4th. That's darn good. If there were any problems with the bushing or sway bars, I don't think I would've done so good.