Mate.. As I said.. It depends on the speed of each car..

There is no figure set in stone.. If one car length is 0.2 of a second on a drag strip. Cars are only doing 25metres per second.. Which isn't even 100kmh..

^ This guy x1000

How could it be a set value Tony? Think about it... Speed is literally distance over time.

Quicker the time (lower number eg 11,10,9) The bigger the gap between each second.

Eq the difference between a 17sec car to a 16sec car is a a lot less than a 10sec car to a 9sec car.

it was just an average with similiar powered cars

120mph is a high 11 53.6 meter per second

127mph in a high 10 56.7 meter per second

138mph is a high 9 61.3 meter per second

is that right?

Not sure about the ET's but the MPH conversion seems right..

Using your ET's..

So in the high 11's your looking at 1 car length roughly 1/11 second.

High 10's roughly 1/12 of a second.

High 9's roughly 1/13 of a second..

These were guesstimates based on a car length of roughly 4.5 to 5.0m..