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  1. #1
    oz_speed's Avatar
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    Is 8600rpm Plus Too Much

    I am running a Riva ECU and the rest is very similar to a Riva St3 kit. I have a 15-19 3 blade and have a 82mm ring in the nozzle. At WOT I am seeing around 8620-8640rpm. My question is am I running my rev too high and would I be better to put a 81mm ring in to pull the rev's down a bit.

    I have just fitted the 15-19r and had a 15-22r 4 blade in before with a 93mm nozzle. I did not gps with the 15-22r but the ski felt like it was quicker to accelerate and the top end speed seemed faster, rpm was around 8350. With the 15-19r I am seeming 8600 plus rpm and I have now gps'ed the ski and it is running at 73.4mph but the ski fells slower.

    Any thoughts or advise.


  2. #2
    speedskixp's Avatar
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    Your on the limiter. Put the 15-22 back in and de-pitch for 8560-8580

  3. #3
    MSRXP's Avatar
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    Quote Originally Posted by speedskixp View Post
    Your on the limiter. Put the 15-22 back in and de-pitch for 8560-8580
    +1. I am doing an 8800 limiter pitched to 8700 to be safe.

  4. #4
    oz_speed's Avatar
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    Would it be worth trying a 81mm ring in the nozzle instead of the 82m I have in now or do you think I wold still be too close to the limiter?

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