Quote:
Originally Posted by jbockrd
The roof is carbon fiber, and the trunk is CFRP.
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Both the same material. But here's the difference ...
Think of what they did for the Corvette C7 roof. The base roof is CFRP, but painted. The top of the line roof is also CFRP, but is not painted. And it costs more. It costs more because people are going to see the fibers in the non-painted (or clear) CF roof so the weave and everything has to be perfect. If they paint it they can get by with a not so perfect weave. There should be no difference in function however.
And so, I believe this is the situation with the M4 trunk lid. If they leave it clear coated like the roof then it will need to be perfect, like the roof. And hence, cost more. So, why don't they paint the roof too? Probably because it may be a little easier to produce perfectly and probably because they might want to showcase it. I'm sure if you want a CF trunk lid then some third party will make one for you. At a premium price, of course.
Cheers.