How much faster are 100m splits in a 4x100m compared to open 100m?

Question

I know 100m splits in a 4x100m relay are generally faster than the open 100m because the runners have running starts.

For example:

in 2001 Milwaukee Vincent's FASTEST 100m sprinter got 6th in state Division 1 with a time of 11.14s.

Their 4x100 relay team got 41.67 seconds at that same meet. (meaning their splits were 10.41s on average)

The 100m dash official world record is 9.72s however the 4x100m world record is 37.40 (9.35s splits).

The record anchor leg in a 4x100 is asafa powell who ran 8.84s anchor leg.

http://www.trackshark.com/forums/viewtopic.php?p=353368&sid=bca1222dedd99f149b1053f569053f2d

So my question is How much faster are 100m splits in a 4x100m compared to open 100m?

And i run an 11.53s open 100m. What is a rough estimate of what my split time would be running anchor leg in a 4x100?

Answer 1

They're is no such thing as a 4X100m split.  It is nonsense to pay attention or even bother trying to take splits in a 4X100m.  Reason being the fly/exchange zones.  Not one runner on the relay will run 100 meters, some will run 110-115 and some will run 85-90.  It is impossible to judge correctly the spot at which to take a split because of how quick the runners are moving and how much exchange positions vary.  Basically, for the 4X100m you want to judge your contribution: did you pass or get passed?  Did you win or lose?  Then stick to your open 100 time as your statistic, because if you start dropping 4X100m splits you will get laughed at.