The Virage was one of my favorite Polaris skis back when I worked at the dealer. But they are a big and heavy boat, there may be ways to make gains on it but one would do well to be careful with trying to extract more power out of a Polaris ski. They never could get the cranks right and would spin one far too easily for the application. When at the dealers, we were too frequently replacing cranks on the Pollies. It didn't matter what model either, SL, SLT, Virage TX and TX-i, Genesis...it was like the cranks were made of chocolate. One place that may offer more insight on the runabout craft such as yours though would be greenhulk.net That is a site specific to sit down skis in the same manner as how here on the X it is mainly a stand-up ski oriented site.