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Thread: Prop Reccomendations??

  1. #1
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    Post Prop Reccomendations??

    I have a 22 Classic with a 260 and Alpha1. I am not looking to tear up the drive, but does any one have a prop recommendation. I am currently running a Vengence 21P and it sometimes feels like it is cavitating...


    Thx
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  2. #2
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    Cool

    Looks like too much torque...flipped the boat over.
    Patrick

    1968 Donzi Ski Sporter C16-512

  3. #3
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    Speed and RPM you are seeing?

    Please give us a little more about the performance of your boat.

    What's the drive ratio? 1.5 or ?
    I'm thinking you would like the WOT RPM to be about 4600.

    I tested a number of props and liked the Turbo 1 3 blade and Merc Rev 4 4 blade the best.
    The 3 blade will be 1-2mph faster on top, but the 4 blade will be faster mid range and the boat will likely handle easier...
    Thank you, Patrick
    1994 18' Classic 350Mag Alpha

    Previously owned Donzis -
    1996 22' Classic, 502Mag Bravo
    1987 20' Minx, 350Mag Alpha
    1975 18' Classic, 350Chevy Volvo 280

  4. #4
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    neweays33. Posting on an I Pad?
    mine flips my pics upside down all the time...D

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    Additional

    the drive is a 1.5. Motor is all stock 4 inch exhaust. The motor will go to 5200 wot. Looking for some better midrange

  6. #6
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    I would say try a 23p mirage 3 blade I ran that on my 18 it was great and I still have it in great shape.

  7. #7
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    does the Vengeance have vent holes? if so, you should plug those first and try it again
    Charter Member - WAFNC, SBBR, KWOSG
    1955 Perfect Mate
    1986 Hornet III, 502-415 TRS

    www.donzi.org


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    5200 is too high for a stock 260HP 350.

    Quote Originally Posted by newdays33 View Post
    the drive is a 1.5. Motor is all stock 4 inch exhaust. The motor will go to 5200 wot. Looking for some better midrange
    I'd try a 23p Turbo 1 or Mirage.

    A 270HP/350 pushed my 87 20' Minx spinning a 23p mirage to about 63mph on gps at 4600rpm.
    Thank you, Patrick
    1994 18' Classic 350Mag Alpha

    Previously owned Donzis -
    1996 22' Classic, 502Mag Bravo
    1987 20' Minx, 350Mag Alpha
    1975 18' Classic, 350Chevy Volvo 280

  9. #9
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    Thx

    looks like the 23 Mirage will be the next step...


    boat1.JPG

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    Quote Originally Posted by SanDogDewey View Post
    Looks like too much torque...flipped the boat over.
    Ya, the I guess... whats the punch line here anyway??

  11. #11
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    Newsday33 where you from I hope your close I would give my prop for testing.I now how expensive it can get, I'm sure we all now.

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    Quote Originally Posted by craigdskilling View Post
    Newsday33 where you from I hope your close I would give my prop for testing.I now how expensive it can get, I'm sure we all now.
    Northern Massachusetts..

  13. #13
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    5200RPM with 21P in a 260 Merc powered 22 is definitely slipping. I wouldn't throw a 23 on just yet. I got a mirage 21P you could try out to base line it. I am just a little more north of you if your interested My Minx topped out @4800 with the21p and the 350 Mag average speed was 58mph in Summer 60mph in spring and fall.
    machinist ,bore it deeper,ream it bigger, and lap it to a fine finish



    https://www.facebook.com/photo.php?v...=2&theater

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    or the tac is wrong.

    Quote Originally Posted by joseph m. hahnl View Post
    5200RPM with 21P in a 260 Merc powered 22 is definitely slipping. I wouldn't throw a 23 on just yet. I got a mirage 21P you could try out to base line it. I am just a little more north of you if your interested My Minx topped out @4800 with the21p and the 350 Mag average speed was 58mph in Summer 60mph in spring and fall.
    Agree a 21P Mirage, Mirage plus, or Turbo 1 is a good place to start.

    My 1987 Minx with 270HP / 350 Mag would spin 4400-4600rpm with a 23 Mirage.
    Thank you, Patrick
    1994 18' Classic 350Mag Alpha

    Previously owned Donzis -
    1996 22' Classic, 502Mag Bravo
    1987 20' Minx, 350Mag Alpha
    1975 18' Classic, 350Chevy Volvo 280

  15. #15
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    Prop

    Haven't had time to reply work has been crazy... Thanks for the offers to test props. where are you located. I am usually at Winne on Sundays

    Mike

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