Hi Brodjack,

That hull looks a lot like the Graupner Giant Racer https://shop.graupner.de/webuerp/ser...2025.200&PIC=4 , now discontinued.

In order to get that hull up to speed, you'll better do some work on the hull; sharpen all training edges on the step and transom, stiffen the hull internally, as the Giant Racer hulls I have seen, were way to flexible to run reliable at the speed you're aiming for.

For a submerged drive, the 20.000rpm at the prop are a good starting point.

Motorwise you could look in the KB45 series from Hobbycity, read the customers comments to get an idea how these motor perform: http://www.hobbycity.com/hobbycity/s...hless_Inrunner

Regards, Jan.