what about the air temperature ? would it matter ? coz here, where i live, when winter comes, it could get up to -40 C

 

The colder the air the better. I go through summer and winter here. Summer time can get up to 110 degrees. And winter can get down to the single digits. I noticed in the Winter the car pulls harder. When it's hot and humid here the car runs slower. I took it to the track and did the 1/4 mile. Any car will run slower on a hot day.