We have a 93 i/o seaswirl 190. it makes a decent wake with no ballast and the prop trimmed up.i can get into the flats, but i want more .where in the boat should i place the weights.for ex. what percent in the front, middle, and back. Oh yeah i use 50 pnd sand bags.... I know,thats redneck right. u can see a little bit of the wake on my profile picture. thats with 2 people in the boat

distribute the weight evenly from front to back is it an open bow if so place a 600# sac in the bow and 600# along the back seat that should get u a decent wake going

with I/O you want a more up front like 70/30.