Spoke with Marcus at Powertech this week and he gave me an exercise: Do 4-5 trials with my boat w/o using any trim tabs at all. Start on Jack Plate setting "0" (all the way down) with trim tabs all the way up (don't use them AT ALL!) and put the throttle tilt/trim switch in the all the way down position.
Do a hole shot and go all the way to wide open and chart top RPM and Speed results. Do the same thing at Jack Plate settings of 1-4 and chart the RPM's and Speeds for all trials.
After doing the trials, go back and go wide open again but this time use the throttle trim/tilt switch to adjust the results. What a difference! I found my fastest speed with in the Jack Plate position 3 with the engine trimmed up just slightly. I wasn't even using the Jack Plate before because of the bouncing I encountered at even 3300 RPMS. I thought I was going to throw myself out of the boat! Turns out I have a very fast boat (56mph @ 5800RPM's) that likes to run. The porpoising at mid-speed (28-34mph) is just something I have to get through.
And my ideal cruising set up is Jack Plate setting 1, 4000 RPM's and 38mph. Now, which new prop to buy to really seal this deal...need you one more time Funky Monkey!
Thanks to Marcus at Powertech for helping me understand how all these components work with each other. I feel so much more confident now.