Was having cavitation issues with my speedster 150 (155 hp). It would run 40 mph @6900 rpm on a lake at 4400' elevation. I know the elevation is a factor.
I just bought the solas impeller 11/19 upgrade and a new wear ring. I took it out to the same lake today and noticed the cavitation is pretty much gone and got the boat up to 41-42 mph but it seemed to top out at 6340 rpm. So its nice to see the speed bump a little and not needing as much rpm to do so which tells me everything is fine, but im just lacking in the horsepower department, which brings me here. I am trying to figure out what i can do to increase my HP so i can get the rpm's back up and let the boat go even faster. The rev limiter is at 7600 rpm btw, which im not coming close to. I have no idea if adding a supercharger to get to 215 hp is even an option with the normal rotax 4-tec or if it is, is it a big ordeal to do? im already running a KNN cold air intake. Just wondering if there are some other upgrades to get back that 25-35hp im losing from elevation?
I just bought the solas impeller 11/19 upgrade and a new wear ring. I took it out to the same lake today and noticed the cavitation is pretty much gone and got the boat up to 41-42 mph but it seemed to top out at 6340 rpm. So its nice to see the speed bump a little and not needing as much rpm to do so which tells me everything is fine, but im just lacking in the horsepower department, which brings me here. I am trying to figure out what i can do to increase my HP so i can get the rpm's back up and let the boat go even faster. The rev limiter is at 7600 rpm btw, which im not coming close to. I have no idea if adding a supercharger to get to 215 hp is even an option with the normal rotax 4-tec or if it is, is it a big ordeal to do? im already running a KNN cold air intake. Just wondering if there are some other upgrades to get back that 25-35hp im losing from elevation?