So you increased your drive in the water instead of raised it? I thought for more speed you needed to raise the drive for less drag. I will try props first. The Bravo 1 is 15 1/4" I would like to try one with 15 1/2" diameter and see what that does to the slip numbers.

Think a hydro motive Q-IV is 15 1/2”

I’d like to try the props Brett has made from BBlades
they are also 15.5” i think they were made for sterndrive applications.

The 28 Bravo 1 is only 27 pitch. This makes the slip % at 15.5%. Not a great number but certainly acceptable.
I would consider the 1/2" spacer.
Our 4-SPEED props are very efficient and reduce slip numbers. With a decrease in slip comes the consumption of more HP and a decrease in WOT rpm.
Mid to upper 20's for slip % at cruise with your hull is not uncommon. Slip is always higher at cruise as the boat is more wetted. There is give and take with Labbing. Top speed Labbing does not help cruise. We Lab each propeller specific to goals. We do not do one size recipe fits all.
Many shops do and many do not understand the adjustments to create the determine outcome.

Brett

Thanks Brett,
I’m going to give you a call regarding some 4-speed and 5-speed testers.
i think i want to focus on cruise more than top speed.
Id like to cruise at less RPM and greater speed if I could

I understand 5 blade is better for this option. I could be wrong.....