I built this splitter from the ground up. Don't know how you can be sure of any thing about it unless you've been sneaking over and splitting wood at my house! I wish you would,, I need the help!
I don't know if I am maxing the pump perfectly, but I CAN guarantee it is faster and more powerful then the 11 I replaced, cause I have spent many, many hours running it. I have an auto return, so speed is important too. When I tell it to return, then let go of it too pick up my next piece, it retracts fully. The first stage of the 16 does not require big hp to run it, so it shoves more to the the cyl then the 11 did,,,,,running it faster to the wood.
Then, even if the motor is under powered to run the second stage fully,, it will run it up to the hp avail before bogging the engine, so on your theory, I would still get the power my engine could put to the pump,,,,,but i have never heard that engine slow down or bog down,,,,so it is handling the 16 gpm pump just fine.
I don't look at my pressure gauges much, but will pay attn to them next time I split,
But too the OP,,,got off track,,,,I think 22 ton it a good size. I have a 27 ton also because my main splitt r does not swivel,,and since I am getting older,,,I don't want to pick up some rounds,, but I dont like using it because it is slow. I have never reached for it because I needed more power.