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      09-20-2019, 06:33 AM   #98
Artemis
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Drives: BMW M2 Competition
Join Date: Jun 2011
Location: Belgium

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Quote:
Originally Posted by CanAutM3 View Post
I am not sure why so many folks say the M2C was at a disadvantage due to the weather conditions. I would tend to say the exact opposite and the article in the OP agrees with me.
From personal experience, my fastest laps are always achieved on very cool days. On hot days (read 32deg C), the tires quickly become greassy and struggle to grip and the engine response is much more sluggish. On a cold day, the first lap feels like you're driving on ice, but as soon as you get a little heat in the tires, they grip solidly. I've achieved my personal best lap on a 10deg C day 2 weeks ago, which is 2 seconds faster than best I could achieve during peek summer in 30+dec C weather. Comparing my data logs, my cornering speeds are much higher on cold days than hot days but my top speed in only altered by a couple of km/h, which tells me tires greatly benefit from the cooler temps.
PSS are summer tires (successor: PS4S).

And there is "cold" and "cool": 1°C/34°F = cold flirting with freeze point (environment & winds); 10°C/50°F is cool.
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