I am currently running a Trophy 24 pitch 4 blade SS prop right now on a 481s ranger. with a Black max 150. At full throttle I get around 52-55 mph and pretty much maxed out on RPM 5800 . I would like a little more top end speed I know a 3 blade should give me that but then It might bring RPMS over . so my question is what pitch to go with on a 3 blade and keep my RPMS at or just under the 5800 RPM