Im running a atlas jp, on a caracal with a 225 proxs which Im sure is totally different to your set up. I would play around with it and find out where it blows out a little then bump it down a touch and leave it there. I run mine on the jp gauge at “5” almost all the time, 6 if im trying to walk it out a little, and 4 if its rough or choppy out. I will add that Im using a 24p fury 4 blade, and its more of a sub surface prop. I have the 33/10 fuel tank configuration, poles, 112 fortrex. Hope this helps. Really the main thing I use that for is idling though shallow water, and loading the boat to get the extra clearance (keep my prop safe). Ive walked it up till water pressure changes and never seen any performance gains. Find that sweet spot where it doesnt blow out and leave it there. Post back on what you find works best. Im sure another sho/ caracal guy will be asking before long. Andrew at ross motorsports in TX would be the one to talk to any sho related I know he ran one like that a while and has sold alot of them. He responds on face book messenger too if you wanna chat with him on there. Nice guy!