Harris Marine Forum - General

jet unit advice

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    haulinass

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    Im looking at a southern 8.5 to go behind a stroked l98
    What sort of cruise rpm and flat out rpm would i see plus any cavitation issues
    Any info would be great thanks
    This would be in a 15 foot hull
    Cheers

    Posted 4 years ago    #                  
  2. Mike
    Mike

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    Hi, we have a 530hp l98 in our boat with a southern jet 8.5, and its awesome with a cruse rpm of between 3200 and 3500rpm giving awesome punch from 3500 to 5700rpm, we see a clean slow plane at 2600rpm in our boats. The great thing about the southern jet is that it comes std with cast stainless impellers and a bis alloy grill , give me a call with the hp and torque of your engine an I could give you more info :big_smile:

    Posted 4 years ago    #                  
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    haulinass

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    Thanks i will be in touch cheers

    Posted 4 years ago    #                  
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    haulinass

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    Ok dyno sheet shows 615 hp at 6200
    With 550 foot pounds torque
    Cheers James

    Posted 4 years ago    #                  
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    haulinass

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    Max torque is at 4800

    Posted 4 years ago    #                  
  6. Mike
    Mike

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    Thats good hp and torque Can you email me the Dyno sheet so I can see what the torque is like down low
    , harrismarine@xtra.co.nz :big_smile:

    Posted 4 years ago    #                  

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