DF90 rpms and prop questions

[Moonlighter]

I may be unrealistic but she's at 25-26mph gps @4500rpms right now. It's a V but not deep. It's about an 11 degree deadrise at the transom.

Something seems strange here - you mentioned in first post that top speed is currently 33mph at 6000rpm, which is probbaly why several of us have thought that its pretty ambitious to get 30mph at 4500 rpm, no matter what the prop.

Maybe a typo there somewhere?

You didnt mention the prop diameter?

I am running a Suzuki stainless 14 x 20 on my DF115 (2010 year) which would be the same cc as your 90. Generally those engines run a 14” dia.