Expected Tire Wear, but not like this?

[WItoTX]

Track time, plus lots of miles, plus toe out problems. I am surprised you got 6k out of them.

Camber has zero to do with it.

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[ShadesOfBloo]

When I replaced my front tires, they were showing cord on the inside edge from 28,000 miles of street driving.

I can see 2 track days doing exactly that.


Now, my static alignment had -1.2* of camber and zero toe. I think it matters more that you're going around curves fast in a nose-heavy car, with just enough front tire.

...I do have Vorshlag C&C plates and a track alignment, but it looks like the entire car had been driving on the innermost 1/2" of tire.

Well, think about it: When you're making a hard right turn, and the car leans to the left, it changes all your tires' camber relative to the road.
The right front tire really might be driving on the innermost 1/2" for the duration of that turn.

 

[agmattocks]

got to make more left hand turns...

 

[GTP]

...

View attachment 897058

So ... no one has any comment regarding the drywall screw in the inner shoulder?

 

[agmattocks]

nope because if you acknowledge it, it will show up in your tire later.... nope I don't see it lmao

 

[ShadesOfBloo]

got to make more left hand turns...

But those cloverleaf entrance ramps all curve right.

 

[agmattocks]

i know sets us up for failure lmao

 

[ShadesOfBloo]

So ... no one has any comment regarding the drywall screw in the inner shoulder?

I thought that might be an improvised plug.
Whether it was or not, I trusted the OP to know his tire better than me.

 

[agmattocks]

he said he tried to plug it and it only held 10 psi..... so this IS his improvised plug

 

[GTP]

That's definitely a toe out + negative camber issue. I always move my alignment (camber) back to a street friendly setting after a track day. In fact I do it at the track before leaving. Zero toe isn't the optimal toe setting on track, but it is for tire wear, and with Cup2's at $2900/set its zero toe and -1.2 camber for the win on the street.

Same here. I switch between -3.5 track and -1.5 street. But keep in mind that the toe also changes by -0.6deg! I wrote up the method I use for conveniently going back and forth - part of my DIY alignment series of posts.

My alignment says total toe is -0.10°. Is that aggressive toe out?
Camber is -3°

Not at all IMO. OP are you running a constant alignment or are you switching back and forth? I take it you don't track your car but are running a track alignment.

 

[agmattocks]

plus if you lower your car and don't adjust for the camber change in these cars your tires will wear abnormally.

 

[GTP]

Here is one of my Cup 2s after 8 track days. I over pressured them and so the center wore out first. I cut into the tread and saw about 1/2mm rubber left there. Will run lower pressures on my next set.

I run square setup and rotate them every event.

I could use even more camber, both front and rear. I also am willing to put on track pads and these tires at home and then drive 200 miles to an event, on the track alignment. I'd rather not put street miles on my summer tires, and save it from my track tires, since they get replaced so often !

 

[JT1]

So ... no one has any comment regarding the drywall screw in the inner shoulder?

Lol, as other's have pointed out, that's the plug. One of the C8 Vette guys at the C&C had it.

I do track the car, I had the Vorshlags installed and the track alignment done right before SAAC-49, then I did another event the following weekend. I maybe drove a thousand miles on the street after that.

I didn't switch back to the street alignment even though the supposed ease of doing that so was one of the reasons I sprung extra for the Vorshlags , based on other reports that changing the camber (obviously) also changes the toe. I wish I had seen your thread on that to see if it was a predictable amount of toe change.

 

[GTP]

I figure that driving my track tires and track alignment to/from the event is more wear on the inner half of the tire which is fine with me. As long as toe is near zero I think the highway miles are nothing compared to track time wear.

Did you find my alignment series in the DIY section?

 

[JT1]

I figure that driving my track tires and track alignment to/from the event is more wear on the inner half of the tire which is fine with me. As long as toe is near zero I think the highway miles are nothing compared to track time wear.

Did you find my alignment series in the DIY section?

I did find them, need to study up.

Right now I'm trying to figure out how to order the non CFTP GT500 bespoke Pilot Sport 4S tires. Michelin website is giving me unclear results which are the bespoke ones.

For the front, the website suggests MSPN 06890, but the tire with the FOR suffix is listed as MSPN 73134.

For the rear, website suggests MSPN 20432, but the one noted as "acoustic FOR" (whatever that means is MSPN 60304.

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