06-23-2009, 11:26 PM #1
RXT Mods Tested - Good and Bad News
I installed a RR high boost SC wheel and solas 14/19. Asked a few guys before installing who said the prop is a good fit, but I was only turning 7,500 rpms max after the install. That's the bad news, good news is I was hitting my old top speed of 66mph at 7,500 rpms.
Going to pitch the prop (first time) to a 14/17 and retest. I also noticed the low-end and mid-range power didn't improve. Should I try to repitch to a 13/17?
06-24-2009, 07:54 AM #2
I'm not prop savvy so I can't comment on that but check for boost leaks and make sure everything is tight.
06-24-2009, 09:03 AM #3
Only places boost leaks can happen is the sc housing and hose to throttle body, right?
06-24-2009, 11:46 AM #4
Note: remember that bending the trailing edge of the prop will not change the root angle of the prop. Your 14/19 will not become a 14/17 by bending the trailing edge. I would recommend researching someone that can get you a pro-pitch on that prop, but the external IC would get you more RPM.
Also remember that every boat and set-up is different...just like a snowflake. A 14/19 that works on someone's ski with the same set-up as yours MAY NOT work on your ski. I had a 14/19, which I bought after recommendation, and ended up getting a 15/20...then pro-pitching to a 12/18!
"Details." *quoted from Danny
06-25-2009, 01:40 AM #5
What were your RPMs with the stock prop/wheel? Have you tried the new wheel with stock prop? What were your RPMs? I'm curious to see if you'd be on the limiter or not. Easy enough to test and best of all its free.
If you had room before, you might be just right with the stock prop in there.
06-25-2009, 09:44 AM #6
Thanks for the input guys. The prop is actually a 15/21, but I was thinking it was a 14/19 (it was originally, then repitched), so no wonder the RPMs are so low. My bonehead move. Going with an external IC and injectors would be nice, but not right now. Next mod will be exhaust and thermostat.
I was right at 8050 or so with stock prop, but thinking to repitch it and throw it in there.
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