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  1. #1
    Registered
    Join Date
    Jul 2007
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    6

    Need Some Prop Help

    Hi everyone I'm hopeing someone can help me out here i have a 36 Carrera with tripple 275 verados i was running it with 23 m+ the boat was only getting around 5600-5700 rpms and 56mph i recently changed the props to bravo 1 22 and i'm getting a little more rpms but about the same speed. what can i do to get a little more speed and more rpms?r

  2. #2
    Registered throttleup's Avatar
    My Boats:
    AKA Throttle Up Propellers
    Join Date
    Mar 2002
    Location
    Cajun Country
    Posts
    5,143
    Found this thread.....this is not cut and dry. So here we go....Can you tell me the performance data on the 22P Bravo I props. Tell me what you liked and didn't like about the way the boat behaved and performed.

    What is the year of your hull?
    What gears in the 275's?

    Julie

  3. #3
    Registered throttleup's Avatar
    My Boats:
    AKA Throttle Up Propellers
    Join Date
    Mar 2002
    Location
    Cajun Country
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    5,143
    So assuming a little more RPM means 5800ish at 56 mph, with 1.85 (thanks MarylandMark) you have 10% slip. The range on a Vee Bottom with a 4B is 10-14% for a norm. So other than your RPM being a little low your doing pretty well. So labbing the propeller might be the best thing to do in your situation. This will increase the RPM 250 and a few more on top should come with it.

    Julie

  4. #4
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    Jul 2007
    Posts
    6
    Hi Julie,

    thanks for helping me out here. the hull is new 2007 and the verados are 2006, 1.85 gear the boat handles well it planes out in just a few seconds but the top speed is where i was hopeing i'd be in the low 60's. am i asking for to much?

  5. #5
    Registered throttleup's Avatar
    My Boats:
    AKA Throttle Up Propellers
    Join Date
    Mar 2002
    Location
    Cajun Country
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    5,143
    Getting the rpm may the key to the top end. Those motors really like to turn a lot of rpm. I'd like to see them turning up around 6200. They really seem to run thier best when at the upper rpm range.

  6. #6
    Platinum Member Platinum Member crb76's Avatar
    My Boats:
    Boatless in Htown
    Join Date
    Jul 2005
    Location
    Houston, TX
    Posts
    1,137
    The 275 verado turns up to 6400RPM. Best horse power and touque on the motors are at 6250. If you dial a wheel in at 6250 then you are going to be right. The Merc Rev 4 is the ticket on most CC with verados. My 25 Rev 4 was 7mph faster than my 24 B1 on my CC.
    Last edited by crb76; 08-30-2007 at 10:40 AM.

  7. #7
    Offshoreonly Advertiser Offshoreonly Advertiser bbladesprops's Avatar
    Join Date
    Jun 2003
    Location
    Princeton, Wisconsin
    Posts
    3,308

    Smile

    crb76 is right on the money!

    I owe you a call Clark, hope all is well! Mark's 28's went out yesterday.
    Brett Anderson / BBLADES Professional Propellers
    920-295-4435 http://www.bblades.com/


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