I know the difference between exit velo and bat speed, however I was wondering how much faster someone's exit velocity would be compared to bat speed. For example, if bat speed was 70, what would the exit velo be?
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I don't think there's a specific answer, as it would depend on other factors as well. Bat speed of 70 that hits the ball off the handle, off the sweet spot, off the end: exit velo will all differ. Launch angle would also matter. Bat speed of 70 on a foul-tip would have a different exit velo than a ball squared up. 70mph bat speed using a heavier bat would impart more force at impact than a lighter bat--affecting exit velo. It's kind of like trying to project distance of the batted ball, based solely on exit velo--there are other factors.
All factors being equal (contact location, launch angle, solidness of contact, bat weight, etc.), higher bat speed will produce higher exit velo (obviously), but I am not aware of a study that provides a direct correlation, keeping all other variables constant. Would be interested in seeing it, though, if it does exist.
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With bats lighter than minus 3 exit velo will often be lower than batspeed. I think with a good bbcor and hitting the sweet spot it should be about 10% higher than the batspeed if I recall nathans formula correctly.
It amazes me how much statistics, numbers, measurable values are used now. I asked my son (who played D1 very recently) what his exit velo and speed was. His reply was "i have no idea, it doesn't matter. The results are all that count." He never asked, nobody ever told him. I'm positive the scouts know though. Keep it simple, play and learn the game.
Trust In Him posted:It amazes me how much statistics, numbers, measurable values are used now. I asked my son (who played D1 very recently) what his exit velo and speed was. His reply was "i have no idea, it doesn't matter. The results are all that count." He never asked, nobody ever told him. I'm positive the scouts know though. Keep it simple, play and learn the game.
I agree that in the end it doesn't matter. Sure there is a given/certain level of exit speed and launch angle needed to drive the ball out of the park. but I've asked some D1 coaches what they look for in a good exit velo and have been told they are not concerned with the velo. Can they hit and where do they make their outs is what they are looking at more. You can tell a lot about a kids hitting ability by charting where they make their outs. I hear often too that the launch angle topic is a bad disease in the game and we should not be teaching our kids to worry about launch angle when up to the plate, especially the younger kids out there.
Exit velo always existed, it was called raw power 30 years ago. Coaches always judged that but formerly it was done by looking at flyball distance (just over if, well into of, warning track, to the fence, over the fence, way over the fence...) and sound of the bat or estimed time needed to reach the of.
Difference is that it is objective now. Not sure how much better exit velo is, real raw power is probably easy to see (if the ball clears the fence by 30 feet....) by an experienced scout but the exit velo takes the human element out of it and makes gray areas easier to judge.