Dar, thats what I was trying to say in my post.
Thats why I spun one prop at 12,000 and the other at 12,800, so they would both consume the same horsepower.
I thought that would approximate the effect the prop change would make on the same engine.
Any yes I know there would be a variable because of porting, that was the comparison between the Rossi and the LA.
Now if we could only get the manufactures to publish the torque curve so we know where to start.