Any good DIY waterjets yet?

[cim96dm7]

This year seems to be about “jetdrive” on efoils.
Atleast 3 brands a releasing their version for this summer.
The E-tron is reviewed but without efficiency figures yet. Also it is not fully a classic jet drive as it has more of a small 6 blade propeller still leaving some airgap.
I made one using 65161 270kv and 75300 ESC back in 2020 with Onean 64mm impeller and stator. I got it up, but starting thrust was underwhelming at more than 6kw consumption.
Thinking perhaps to try again moving to 80mm size and increasing outlet size for less back-pressure.

Anybody with succesful builds that can share? Know of any good impellers in this range?
I only know of MHZ 80mm and Tilkiea 85mm, both are 180€…

[Jezza]

Use a prop from these guys: https://kenzenrcthruster.aliexpress.com/store/903850?spm=a2g0o.seodetail.0.0.3e3479c7Uvk4nK

A 270kv motor doesn’t really work for a jet though as the blade pitch is normally too low to get any real speed. You’ll probably max out at like 22kph or something.

[cim96dm7]

C’mon Jezza You know me better than that. Those kort-nozzle thruster i could weld myself. But perhaps they are actually more efficient than a real impeller.
I still think the Tilkeas look best as they are a downsized std Solas. Also 14krpm is more than enought for any jet. problem is to get it efficent at 7krpm as well.
Zortor makes a 90+ size jet, but are not selling parts yet.