[ddeflyer]

Originally Posted by CSG Mike

Any videos of the noise?

Stock suspension? Stock sways? Tires? Rims?

Suspension is completely stock (including alignment). Rims are Enkei PF01 18x8.5 +48mm with 225/45/R18 Yokohama Advan AD08R. I might have video of it but I filled up the memory card on my in car camera in the last or second to last session so I don't know if I actually got any of it (I haven't looked at the data from the camera yet). I would generally describe the sound as similar to clogs of rubber being picked up and chucked by the tires except that it happened as I enter and exit high G corners. Also it happened too much to be just track crap being picked up and tossed; not to mention I was on the normal line so there shouldn't have been much there.
This was the ninth track day I've done in this car and was doing about 2:21-2:22 at Thunderhill (which I think is low to middle intermediate level).

The brake judder was pretty rough which is why I gravitate towards it being the source of the issue. It is embarrassing, but I think I did a really, really, really small amount of bend on the disk by trying to lever it (just by hand) against the pads to push the pistons back into the calipers when swapping pads (as in, super small amount). I think this time was the first time I REALLY got the pads hot enough to get substantial bedding-in done but then not enough to overcome the reduced heat on the other half of the rotor. From a quick inspection it looked like the rotor has one half of the outer face nice and greyish while the other half is silvery. I will know more when I pull the rotor off later this week though.