96 GTX Impeller advice

[eavega]

Hey folks

I have a 96 GTX with a fresh top end rebuild and new wear ring. When reassembling, I changed out the impeller from the stock 271000660 16/23 (which was in good shape) to a Solas Concord SD CD 14/22, It was a recommended Solas impeller for the 96 GTX with a stock engine. I had purchased the impeller for another ski which I never changed out, and thought Solas would be better.

I've run the ski only once since changing the impeller, and its barely running 50 MPH at 7000 RPM. Since the spec Speed for this ski is aroun 55 mph, I'm wondering if I'm not under-propped with the Solas. I know from my boating experience that dropping pitch will result in better hole shot at the expense of top end speed, and higher pitch will result in more speed if your engine can turn the prop at recommended RPM. That tells me that I should go back to the stock seadoo impeller if I want optimal performance. Is there something else I am not seeing here? Is there an advantage to the Solas design? Any insight would be appreciated.

rdgs

Eric

 

[Triorieel]

As you said, better holeshot, better waterskiing/tubing, etc...
Reportedly the concord is supposed to be a good design. I have one currently in the mail for one of my seadoos.

I don't know if my seadoo has a warn wear ring, my weight is more then the horse back rider they tested it with, but I generally get about 55mph out of my seadoo thats reported to go 60mph. Thats based on the inaccurate onboard seadoo speed sensor. I am going to install a new wear ring when I install that concord prop to make sure its a nice fit. I plan to get numbers of a before, an after with old wear ring, and an after with new wear ring. This way I will get a better idea of how much the new prop brought to the table.

Heres a nice chart for recommended impellers for seadoo's:
For your seadoo they suggested a solas concord 15/23.
http://www.pwcmuscle.com/pwc-performance-parts/sea-doo-pwc-performance-parts/sea-doo-pump-handling-parts/impellers.html

 

[eavega]

Thanks for that chart. I guess I looked at another one that said the recommended Solas was SD-CD-14/22. I ended up swapping back in the stock impeller, and I did get 52 MPH by GPS. It did also bring my WOT RPMs back to about 6800 RPM, so it definitely pulled the engine speed back to where it should be while increasing my top end some. Guess I am sticking with the stock impeller and going to try to sell the Solas 14/22.

-E