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  1. #1

    Impeller choice advice needed 2010 RXT-X vtech 8375

    Impeller choice advice needed 2010 RXT-X vtech 8375
    With stock 87mm nozzle, 4" air intake

    15/19R or 15/20R solas?
    Wich one is the best choice...

    Thanks!


  2. #2
    PWC Addict Magnummmmmmmmmm's Avatar
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    I've got the 15/20r on my 2013 but my nozzle is 83mm. You would need a taller prop with the 87mm nozzle probably. Perhaps you could find someone who has a spare 2011 and up nozzle for sale. The vtech+15/20r+83mm nozzle is about perfect.

  3. #3
    JT jpt7779's Avatar
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    IMO with only a 8375 limiter go with the 15/20 with the 87mm. Hole shot and acceleration will be real good. The 15/19 will put you up against the limiter.

    I use a 12.5/19 with a 87mm for best overall performance in warm/hot weather, revving to 8800 rpm. I switch to a second pump with a 15/21 and a 83mm nozzle for the cool fall/spring weather, which yields 2-3 mph more top speed, BUT not as good a hole shot and acceleration compared to the 87mm.

    It really depends on you goals and weather conditions.

  4. #4

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    Quote Originally Posted by jpt7779 View Post
    IMO with only a 8375 limiter go with the 15/20 with the 87mm. Hole shot and acceleration will be real good. The 15/19 will put you up against the limiter.

    I use a 12.5/19 with a 87mm for best overall performance in warm/hot weather, revving to 8800 rpm. I switch to a second pump with a 15/21 and a 83mm nozzle for the cool fall/spring weather, which yields 2-3 mph more top speed, BUT not as good a hole shot and acceleration compared to the 87mm.

    It really depends on you goals and weather conditions.
    So riva shows this part# for their R series impellers
    Stage 2 8300 rpm 74mph - SRZ-CD-15/19R
    Stage 1 8000 rpm 72mph - SRZ-CD-15/20R

    I have riva pump I was planning on running on my AS260 with the 8375 tune, which impeller do you recommend for summer riding. THX!

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