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  1. #1
    Fastest in my cove sfackett0's Avatar
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    quick questions on reduction nozzle

    How much rpm's do you gain back from using this. Not looking for an exact number just a ball park idea.


  2. #2
    Quote Originally Posted by sfackett0 View Post
    How much rpm's do you gain back from using this. Not looking for an exact number just a ball park idea.
    I think the general rule is 100 RPM loss for every mm you decrease the nozzle size and 100 RPM gain for every mm you increase nozzle size. So if you're turning 8100 RPM with a 83mm ring you would turn about 7900 RPM with the 81mm. Most have found that pitching for the 81mm ring yields the best top speed.

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