CandyApple7 said:
most of my body is carbon fiber and a lighter chassy
So how much weight do you (seriously) think that took off? Maybe 500 pounds at most taken off? Then add the weight of your turbo, intercooler, etc. So thats probbaly about 300 pounds that you took off all together. A 7 series weighs 4255 pounds (curb). So 4255 - 200 = 4055.
This is all done in my head, so correct my mistakes
Power is 475hp, so 475/4055 equals a power to weight ratio of roughly 0.11713933415536374845869297163995.
So in order for you to do a quater mile in 10.8 seconds, you would need to put out roughly 636.2200935486642 horse power at the wheels.
Hm, take a picture of your time slip, I'd like to see that...
Also, with only 475 (wheel i assume) horses, your car would have to weigh 2650. There is NO WAY you'd be able to get a 7 series to be that light.