I'd like to know, whats the point of not going with a rebuild of the motor that was designed for the ski... And with that im going to tell a story... :ack:
When I was younger I worked in the irrigation well industry. We would put pumps in the ground that would drive water to the sprinkler piviot or whatever the farmer wanted.. I spent a lot of time reading tons of books on how these water jet pumps worked. There was great info on performance curves and such and the size of motor needed to drive the pump.
In short the performance came from the pump design not the motor... If you wanted a well to produce more water from the ground, you didnt go get a bigger motor, you went and bought a different pump design.
A pump of this sort has two main parts, we talk about one part in this forum all the time, thats the impeller. The other part of the pump is what was called the bowl. We dont talk about the bowl a lot here, but in terms of how the pump works it is very importaint. The impeller creates its thrust by force when it trys to compress the water against the bowl design.. I use the word design because the design of the bowl matched with the design of the impeller gives you ALL the performance you will generaly see in your water craft. Thats why if you read about all the bolt on performance tips you see only give you on average only 4 or 5 more mph.. and the cost of that extra power is at a cost of 3 to 6 thousand dollars.
In theory, if anyone wants REAL performance gains out of the water craft, you would have to put most of your focus on the impeller and bowl / nozzle design.. I would bet that if you changed these two componants you would see a lot larger gains in terms of performance.
