I find that it can also differ with each horse. On top of all that, you can whip a lot later than Lenny suggests and still the get the revolution. It's a little harder to get, but it takes a lot less out of the horse so you can run it more often. I think the key to it is stamina. You can't run a horse with low stamina and whip later because it will already be decelerating. It's trial and error. I've gotten the burst whipping at 1.2 in a 10 furlong race with a preceder. Maybe it was the horse.

bloom