How many revs at WOT on 150 hpdi vmax

Hey guys,
im in the process of playing with different props and would like to know what my motor should be revving to at WOT

Cheers Brad

[boats.net]

4500-5500 rpm's is the wide open operating range.

Thanks for your help.I am currently spinning a 25pitch prop and getting 5400rpm at full noise.
I now think i should try a 24pitch to try get the revs to 5500rpm

cheers