So her is my predicament. I plan to convert my car to a amphibious car. Don't be negative and judgemental about it but I need help to figure out how I should power it on water. I have a 1400 lbs car. It has a 67hp engine. What I'm thinking I want to do is have a sprocket/gear attached to my crank shaft of my engine. In which I will have a hydraulic pump being chain driven from that spricket. In which two lines will be run back to where I want to take the impeller jet assembly off a jet ski. Where it will also be chain driven to adjust torque and rpm as need. I think that cover the jest of it. But what I need to know is how fast does jet ski assembly need to turn. What size hydraulic pump and motor will I need? Does my idea seem scientifically plausible the way I have thought of it?