Wake size for I/O

I know that i/o boats dont make much of a wake but are there any other tips for increasing the wake size besides weight weight weight. ive already thrown about 600 lbs of cement in the boat and the wake got bigger but not by a lot. would changing to a four blade prop help at all? it drives me crazy riding behind these sans and x-stars with huge wakes then going out on my boat and feeling like its a jetski. all help is appreciated