I don't know if that is helpful to you, but I love bumps.
When your front wheels reach the highest point of the bump/bank (the highest point in that case, is when the bank goes from angled back to straight). Then you should pop. And also, speed helps. The shorter the bump is, the harder it is to time the perfect moment of popping. But yeah, just try until you get a feeling for that.
Hope that made sense.