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Gph#s On 8.1 Crusader

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  • Gph#s On 8.1 Crusader

    Does Anyone Have The Gph#s Across The Rpm Band On A Straight 8.1 Crusader/25cc Combo? I Am Looking At A Second Hand 25 Cc Gas Model With A Newly Installed 8.1 Crusader And Jack Shaft Combo, But See The New Models Are Installed With The Straight Inboards. This Info Would Be Much Appreciated. Lct.
    P.s. Great Forum, Perhaps The Best In The Industry

  • #2
    http://www.carolinaclassicboatowners...read.php?t=592
    --Mike
    2004 Carolina Classic 25 - Little Dandy
    Volvo 8.1 DuoProp
    ocimaya.org

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    • #3
      Thanks for the quick reply. Are those #s with a straight or DP? I imagine the DP would be more effciient.

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      • #4
        I don't think it makes much difference. The numbers posted are just GPH at RPM. The loaded running motor requires that much fuel to make those RPM. Increase the load, and you need more fuel. If the straight inboard is slightly less effiecient it will show in lower speed at a given rpm. I doubt that Volvo or Crusader branded engines are much different efficiency wise, because they are the same GM 8.1 motor, just different "marinizing". Thats my take on it anyway.

        My boat, jackshaft w/C-5 stainless, has nice range of rpm where the motor feels like its running in its optimum between around 3200-3800. Those numbers from the other thread seem about what I see, though I have no way to measure GPH. I may add a flo-scan with the price of fuel lately.

        Anyone with flo-scan on 8.1 please chime in with your numbers.
        --Mike
        2004 Carolina Classic 25 - Little Dandy
        Volvo 8.1 DuoProp
        ocimaya.org

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        • #5
          Thanks For The Info. Are You Happy With Your Cc25? I Am In The Market For A 24 To 25 Express And Have Narrowed My Selection Down To The Cc25 And 248 Albemarle. I Will Be Keeping My Boat On A Trailer. Will Need To Upgrade From A Tahoe Z71 To Hd2500 Diesel If I Am Going With The Cc25 Due To Weight Load. My Wife Likes The Cc25 Better Due To Its Layout And Cuddy Size. Will Be Making A Decision Soon. Regards.

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          • #6
            25 vs 248

            Don't know the 248, have CC25 and will repeat other posting
            'My boat, jackshaft w/C-5 stainless, has nice range of rpm where the motor feels like its running in its optimum between around 3200-3800. Those numbers from the other thread seem about what I see, though I have no way to measure GPH. I may add a flo-scan with the price of fuel lately.'

            At 32-3400 runs a solid 21-22kts. Find best trolling 1100-1150 rpm (6kts area) and the boat raises fish.

            My wife too liked the layout. We use the frig often (and a cooler for long trips). With shorepower the microwave will heat water for coffee in the morning. Found the v-berth comfortable for two - cushions too thin so we added a spacefoam overlay. I use a portable a/c unit in the summer. Very nice to have a 110v outlet to charge cell phones, cameras, laptop etc overnight.

            I keep a written fuel log - hours from the meter vs. fill ups. Over time you get a reasonable idea of conditions and fuel burn.
            Also keep on trailer. Unless real windy I can launch and land alone (when I have to). CC makes a great boat, if the 25 fits your needs, you can't go wrong with them.
            johnd

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