And didn't you mention you were using a wood prop? Functionally all props are pretty much the same. But wood props tend to be heavier than plastic and thereby add more load to the motor reducing performance. There are wood props made for electric which don't load the motor as much. However, the plastic props aren't always the best either. The cheap plastic will flex under high rpm and flatten out at the tips more resulting in a loss of thrust. It's all a trade off between price and performance.