Track racing bike-build

I actually did calculations, assuming acceleration from a standing start to 33mph in 15s, the extra 200g robs you of 1.5W, out of 750W required for accelerating you and the rest of your bike and about 600W of aerodynamic drag at the maximum speed. Working back to distance covered in the time with the acceleration reduced to account for the extra mass puts you about 25cm behind after one lap.

Where did you get 750W from??

And what would the 25cm equal in time (my maths isn't working today) it seems like a pretty big gain for a loss of 200g on a bike, simply going from the steel nittos to a carbon bar would probably do that, yet it's never reflected in the times.