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G87 M2 Thunderhill East Bypass 2:06.320 - Jan 12, 2025
JCSpeed
Localização:
United States
Nível:
Amateur
JCSpeed
Data da Volta : 14 Jan, 2025
2min 6.32seg (+3.63s)
Thunderhill (East 3 Mile w/ Bypass)
BMW M2 G87 2024 (JCspeed/PS4S)
Leve
Pneu: 300 Pilot Sport 4S
Tamanho do Pneu: DIANTEIRO: 275/30/19, TRASEIRO: 285/30/20
Publicado em 01 Mar, 2025

Thunderhill East and 6th track day in my new(ish) M2.

I went into the day believing my tires would have one more day before I refreshed with a new set for 2/1 Sonoma weekend, but unfortunately they did not last much past the first session of the day. My fastest lap was my 3rd lap in the first session of the day, but things went downhill from there. After the first session, the tires' grip noticeably dropped, and I didn't even finish the day.

Personally, I felt like I could have broken into the 2:04 range, but will just have to wait to next time to see!

Changes:
AST Camber plates and KW HAS lowering springs installed and custom alignment. Installation of HAS caused additional neg camber, which was perfect as that what I was planning to add in anyway to help with the heavy outside tire wear and increase traction in turns. Additional neg camber added up front to -2.8 deg (previously -1.45 which I ran in Dec 5-Mile). Rears set to -2.2 (previously -2.0). I'm not a super-experienced racer that can yet pick up all the changes, but it was easy to tell that the car felt less stable under heavy braking, which is to be expected from smaller contact patch on the straights (right?). But given the issue with worn tires, I'm not sure how much were the tires vs the camber changes. Also felt the car oversteered easier. Tire condition I'm sure was a contributing factor, but I'm wondering if the additional 1.5 camber added to the fronts while keeping rears within stock levels, contributed to this.

@speedsftrackevents8380

2024 M2
Valvetronic midpipe, Michelin PS4S, KW HAS, AST Camber plates, Wheel Spacers (F:18mm R:15mm) Stock everything else.

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