Quote:
Originally Posted by chris719
The roof weight is almost certainly statistically insignificant, even if it is at the top of the car. I highly doubt anyone could tell the difference in a blind track comparison.
The reason BMW uses CF roofs on F8x is not really for performance reasons, it's because it looks cool and it's a marketing bullet point. I am sure for the price of R&D on that roof you could buy better dampers or something that has a measurable impact, but BMW is also trying to develop their carbon fiber manufacturing and bonding technologies for other purposes.
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I still believe roof weight is quite important and BMW did not just add CF roof for just cosmetic purposes. Weight distribution higher up top causes whole lot more body roll than the same weight more on the bottom. Try heavy helmet when taking on corners hard and see how you neck is so much more affected by the weight of the helmet.