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  1. #1

    Join Date
    Jul 2006
    Location
    grand bend.
    Posts
    35

    what's my impeller pitch?

    Hello,

    I put my 13/21 nujet in my impeller guage and here are some photos of the different pitches. It appears that only the last 1/2 inch of the trailing edge has been bent to a 21? I could only spin this impeller to 6950 rpm with a stage II setup. An inch & 1/2 of the trailing edge appears to be approx. a 19 with a sharp bend to 21. Does anybody see it differently? Should I only bend the last 1/2 inch? I'm thinking a 18 or 19 degree trailing edge should put me into the proper rpm range.

    Thanks.
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