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  1. #1
    Kiwi spanner handler
    Join Date
    Dec 2007
    Christchurch NewZealand

    Some updates on rxp build and some ????

    Some of you will remember I posted pics etc of the race rxp we are building with extensive hull mods,c kit intercooler etc etc.

    First run with the pump liner bored oversized and bigger prop etc we got 77mph on radar at around 8400rpm but cavitation was horrific we tried different pitches etc but gave up on the big pump for now.
    Running the riva stage 3 prop we were on the limiter all the time and pitched up a little and cavitation is better but still there.
    Running a pitched up 14/19 we had no cavitation but revs were down to 8100rpm.
    As for hull it runs real straight in rough water (following other skis) but pushes out in the turns and under steers a bit we extended the nozzle and changed sponsons which helped but no we have cut off the modified chines and will retest.
    What can we do to reduce oil comong from breather as the hull is a mess with oil we have a catch bottle (which seems to leak)
    Any prop ideas as with the throttle body and c kit we seem to over power the riva prop


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