Originally Posted by M3PO
I had a different experience. Our cars made almost exactly the same power. Mine came from the OEM update though.
My car LOVES the cold weather. To the point where I find the summer performance disappointing. In the winter, I could swear it has 40 WHP more! It's bitter sweet because of the decreased traction. :-/
I know exactly what you mean! It's even worse when we have to use winter tires..."more" power, less traction due to temps, less sticky tires....worst combo ever
For what it's worth, I think it is very challenging to make any sound conclusions when comparing figures from two different dynos, especially with the E92 M3. A lot of forum sponsors here have posted countless amounts of dyno data from different client cars and what's most interesting is seeing how much results vary from car to car, despite having similar modifications.