1989 26’ Predator

Discussion in 'General Conversation' started by Jonnydime, Sep 7, 2021.

  1. Mistress

    Mistress Well-Known Member Staff Member Supporting Captain

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    600 cfm should feed 400 ci and 400 hp.
     
  2. Jonnydime

    Jonnydime Active Member

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    49F14F82-7898-46B0-80D9-70B2CCD83ED8.jpeg F690A96E-3636-4639-B0F2-EA2DBE84ABD1.jpeg Upon further inspection it turns out my cupped 16x17 from 1989 has been reworked to a cupped 16x18
     
  3. seatux

    seatux Well-Known Member

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    I cant see clearly, but it looks like they took it from a 18 to 17.
    If I had it I could actually measure the degree, or failing that use a "jewlers loop" to look carefully and determine if the 8 was stamped on top of the 7 or visa versa.
    You can do that..
     
  4. Jonnydime

    Jonnydime Active Member

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    Are you in Florida I’ll ship it to you.
     
  5. Mistress

    Mistress Well-Known Member Staff Member Supporting Captain

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    Hard to say which # came first.

    16 x 17 I believe was factory. More common to take pitch out with factory power.
     
  6. Jonnydime

    Jonnydime Active Member

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    I’m wondering if pitch was added when the stroker motor was put in. I borrowed a factory cupped 16x18 Michigan wheel prop from a friend that I’m going to try out. The cupping on that prop is definitely less then the one I took off.
     
    Last edited: Sep 21, 2021
  7. Mistress

    Mistress Well-Known Member Staff Member Supporting Captain

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    It would make sense to add pitch with the hot rod motor.

    The cup supposedly helps lift the stern.
     
  8. Matt Dickinson

    Matt Dickinson Active Member

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    I am running a punched out 350 SBC. About 300 HP. I am spinning a cupped 16x17 three blade on a 1.52:1 velvet drive. Perfect set up for my 26 cuddy.
     
  9. Jonnydime

    Jonnydime Active Member

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    I’m going to try out this other 16x18 and see how it goes. General propeller is localish so I might send one to them to be modified.
     
  10. Jonnydime

    Jonnydime Active Member

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    Well I picked up 300 rpm but lost 1 mph. I think I’ll have the other prop cut down 1/2” and see where that gets me.
     

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