Does Horsepower and/or water pressure increase from 5300 to 5700 RPM.

[Nx591]

2012 Optimax 150 serial number 1B935069.
With current 24p Tempest Plus I only get 5300 RPM and 56 mph. That’s at 3.5 inches below the pad and 16 psi water pressure. I am getting a 22 pitch Tempest Plus to try and want to know if the HP increases slightly between 5300 and 5700 or is it flat? What about water pressure? I can’t find any HP or WP curves online.

[lpugh]

Horsepower goes, up and water pressure should also rise a little if the motor height is correct.
Prop it for max rpm under good conditions loaded normally.

[JOE54]

peak power is made at recommended rpm , ram effect increases wpsi