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06-30-2023, 12:21 PM | #1 |
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Help me read my tire wear
4th track day (2 SOW 2 BW CW13) on 225/45/17 Cup2s drivers side front rotated after every track day. Car is stock except top hats, camber bolts and alignment. I don't remember what the camber on the front is but I think it is under 2 degrees.
Usually all my 200-240tw tires wear this way. First I wear out the center strip, than the outside half of the tire with the inside basically brand new. So what are the issues here? 1) Not enough camber? If so can I get more by adding a second set of camber bolts (upper hole, opposite side) or gotta have coil overs now? 2) Am I losing the center strip first due to over inflation? 3) I drive pretty aggressively, maybe I am causing too much understeer due to steering angle? |
06-30-2023, 12:36 PM | #2 |
1. yes more camber needed.
2. possibly. what pressures are you running? 3. hard to say from here! are you fighting understeer a lot? also are you on stock wheels? a tire pyrometer might help you a lot. - Andrew |
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06-30-2023, 12:56 PM | #3 | |
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What's your tire pressure? Sounds like you're running too high pressure? |
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06-30-2023, 01:03 PM | #4 | |
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I don't fight understeer a lot, I actually fight oversteer most of the corner. I guess corner entry I div in pretty hard and the car pushes but mid corner and corner exit is always a battle against oversteer. I am on stock wheels. Tire pyrometer seems like too much over head. I need to do hot laps then come to hot pits get out, check tire temps and record right? |
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06-30-2023, 01:18 PM | #5 |
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06-30-2023, 01:19 PM | #6 | |
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Either way, yes I think more camber would help. How do your rear tires look? More front roll resistance could also help. - Andrew |
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06-30-2023, 01:25 PM | #7 |
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Looks over driven with too much steering input more than anything else. I bet decreasing pressures helps the first time you try it and then you get comfy pound on them again and the problem persists. More camber will be better but won’t solve what you’re seeing here.
Are those GT radial sx2 or Michelin? Edit: either way back down the speeds in corners, tires shouldn’t be screaming, ideally they whisper. You can make them scream for a lap but after that you get the wear you see above. |
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06-30-2023, 07:40 PM | #8 | |
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Edit: I think I don't know how to drive fast without abusing my fronts... my laptimes are not even that competitive, running 2:10 at buttowillow with this setup, should be 2:06 ish to be considered reasonably fast. |
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06-30-2023, 07:46 PM | #9 |
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The Following User Says Thank You to andyk5 For This Useful Post: | strat61caster (06-30-2023) |
07-01-2023, 11:11 AM | #10 |
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The cost of a pyrometer is half that of one new tire. So, before ruining another set…
I bought mine on eBay.
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The Following User Says Thank You to Muskoka800 For This Useful Post: | Racecomp Engineering (07-01-2023) |
07-01-2023, 02:13 PM | #11 |
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07-01-2023, 02:18 PM | #12 |
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07-01-2023, 05:36 PM | #13 | |
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a hammer is used to nail wood together that can build a house, just as a pyrometer can be used to tell temperature across the width of the tread. it's how the tool is used, and the information it provides is used that determines the tools functionality. how does a fancy temperature probe tell camber or pressure issues over a bad wheel bearing or terrible driving? i'm not saying that it's not part of the solution, but it's not THE solution. even worse, is if the OP were to get one, and then it sits on the shelf.
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Last edited by soundman98; 07-01-2023 at 09:09 PM. |
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The Following User Says Thank You to soundman98 For This Useful Post: | strat61caster (07-01-2023) |
07-01-2023, 07:19 PM | #14 |
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The Following User Says Thank You to andyk5 For This Useful Post: | soundman98 (07-01-2023) |
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