So I was at Watkins Glen 5/1 and 5/2. On day two, 3rd session, I started getting a very noticeable vibration coming through the chassis. I only had one dry session on Monday, on the long 3.45 mile course. No issues Monday other than me being in a new car, and temps below 50. On day two, the first two sessions on the short NASCAR circuit were going well, temps almost hit 50, track was dry.
On the 3rd session, after T1 RH corner, exiting around 70 to 75 and accelerating to T2 also RH entering the Esses, I feel this alarming vibration in the chassis. I was entering T2, RH between 90 and 100 mph, as those were my entry speeds in my C7.
Initially, I figure it's just the track surface, or pick up or something on my tires. Vibration mostly disappears after cresting the hill T3 LH at 110 and I don't feel it the rest of the way around. Next lap same vibration same spot on course, between T1 & T3 ??? I am like what's going on. Do I have a tire going down... Is the pavement torn up which is uncharacteristic for WGI
As I know it's my last session of the day, I keep driving, try a different line, vibration isn't going away.....
Obviously made it through the 20 minute session, a little worn out from worrying. I go cool and the car down, go the gas station, pack up and drive home 400 miles. I have checked the rear left axle shaft 32 mm nut, marked it, and turned the torque wrench up to 250 pounds, it wouldn't budge. Lug nuts were all fine as a torqued them twice daily. After driving all the way home, the only thing I could find that might even begin to maybe cause this was a ribbon of melted rubber about 1/4 to 3/8" wide all the way around the circumference of the tire approaching the edge of the first rain groove in the Cup 2. I am suspecting that ribbon was larger and more pronounced when I was on track last session, as it survived a 400 mile journey home.
Anyone have any thoughts about what might have been happening, and more importantly what I need to be checking out ??? Thanks
On the 3rd session, after T1 RH corner, exiting around 70 to 75 and accelerating to T2 also RH entering the Esses, I feel this alarming vibration in the chassis. I was entering T2, RH between 90 and 100 mph, as those were my entry speeds in my C7.
Initially, I figure it's just the track surface, or pick up or something on my tires. Vibration mostly disappears after cresting the hill T3 LH at 110 and I don't feel it the rest of the way around. Next lap same vibration same spot on course, between T1 & T3 ??? I am like what's going on. Do I have a tire going down... Is the pavement torn up which is uncharacteristic for WGI
As I know it's my last session of the day, I keep driving, try a different line, vibration isn't going away.....
Obviously made it through the 20 minute session, a little worn out from worrying. I go cool and the car down, go the gas station, pack up and drive home 400 miles. I have checked the rear left axle shaft 32 mm nut, marked it, and turned the torque wrench up to 250 pounds, it wouldn't budge. Lug nuts were all fine as a torqued them twice daily. After driving all the way home, the only thing I could find that might even begin to maybe cause this was a ribbon of melted rubber about 1/4 to 3/8" wide all the way around the circumference of the tire approaching the edge of the first rain groove in the Cup 2. I am suspecting that ribbon was larger and more pronounced when I was on track last session, as it survived a 400 mile journey home.
Anyone have any thoughts about what might have been happening, and more importantly what I need to be checking out ??? Thanks