Luc, emperor are supposed to be a late variety. My emperor trees have fruit that is still a month or more from being ready. Do they normally come early for you?
My Sweet Heart were ready 2 weeks ago, just 4 pounds on my small tree but very tasty. Next were my kaimana, around 3 pounds on a smaller tree. Maritius would have been next but the iguanas ate them all, around 20 pounds. Then iguanas ate all my hak ip, around 5 pounds. Next would have been Bengal, again iguana chow. I still have a small cluster of ohia that are green and the emperors.