Had video issues, so no Glen videos. 
Did get lap data. Ran a wider tire and got to compare CAI (jlt2 tune required) vs stock airbox.
Airbox comparison: No noticable difference in power or lap times. The CAI is noticably louder, but that is about it.
Tires: I actually went a tic slower with a wider tire. I found that strange as the laps felt really good, I was driving my ass off and had a blast. Got to run about 350 track miles in ten 25 minute sessions. At Summit point main, I figured out why I was off last years pace.
This is what I have concluded from the lap data: The new tires were also taller by a considerable amount making the gearing taller. I lost laptimes due to the gearing. The slicks I ran my best laps are a little over 25" tall, 245 width. The new 285s are 26.7" tall. I had to completely change where I was shifting on track. Used 3rd a lot more at both tracks. I actually pulled a tic higher lateral Gs with the smaller tires, and used 4th more with them.
I was 2 seconds off my best lap at the Glen, and 1 second off at Summit.
Lesson learned, a bigger tire is not always better.
And I now know to stick closer to a 26" tire, that works best on my combo.
No plans to return to an event at this time.
Need to edit the Summit videos.
Did get lap data. Ran a wider tire and got to compare CAI (jlt2 tune required) vs stock airbox. Airbox comparison: No noticable difference in power or lap times. The CAI is noticably louder, but that is about it.
Tires: I actually went a tic slower with a wider tire. I found that strange as the laps felt really good, I was driving my ass off and had a blast. Got to run about 350 track miles in ten 25 minute sessions. At Summit point main, I figured out why I was off last years pace.
This is what I have concluded from the lap data: The new tires were also taller by a considerable amount making the gearing taller. I lost laptimes due to the gearing. The slicks I ran my best laps are a little over 25" tall, 245 width. The new 285s are 26.7" tall. I had to completely change where I was shifting on track. Used 3rd a lot more at both tracks. I actually pulled a tic higher lateral Gs with the smaller tires, and used 4th more with them.
I was 2 seconds off my best lap at the Glen, and 1 second off at Summit.
Lesson learned, a bigger tire is not always better.
And I now know to stick closer to a 26" tire, that works best on my combo.
No plans to return to an event at this time.
Need to edit the Summit videos.
