I am a bit confused about Jet pump physics and what some folks have clamed about the results of changing impellar sizes.
My question is.. why a larger impellar would have any better holshot over a smaller one.
I understand the fundimentals about impellar sizes and how they load an engine .
Smaller impellars reach a higher RPM befor they absorb the engines power.
From what I can tell, impellar size selection are usially changed to get and engine to rev into its peak hp range.
So if a given jet boat will turn an "A" to 5400rpm (apr 500 hp), and turn a "C" to 6000 rpm (apr 500hp)..Don't they pump about same amount of water just at different RPM's?
And if you are pumping the same amout of water through the pump then
why would one impellar have a better holeshot over another?