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      07-15-2013, 01:48 AM   #13
swamp2
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Quote:
Originally Posted by solstice View Post
...
The F80 will have no such exotic engine and need another party trick. To me that is low weight. 3300 lbs is not such a stretch or expensive as you make it out to be.
Carbon fiber is the composite that provides strength stiffness and potentially the largest weight savings. Unfortunately, it is also extremely expensive. Have a look at this discussion thread from over a year ago where we debated early weight rumors for the car. In that thread (post #57) I showed how it would cost BMW about $1k to save 300lb using carbon fiber. That number may be closer to $1k for 500lb as well, it all depends on how inexpensive BMW has been able to purchase and manufacture composites. Keep in mind this is not $1k in the PRICE of the car, but $1k of COST, that will be significantly multiplied many times over for PRICE. Given that the raw material itself (carbon fibers) are probably still the controlling cost factor, I doubt they've had any great breakthroughs on cost. In short, the conclusion from that thread is that a 3200 lb car is extremely unlikely, I also believe 3300 is as well for the same reason.
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