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  1. #1

    Turbo boost low rpm vs high rpm

    not sure if this makes any sense is it safer to produce turbo psi at around 7000-8000 rpm vs 8000-9000 rpm? i run 16 psi and want to up my boost to 20-22


  2. #2
    What are you running for boost control?

    Andy

  3. #3
    Got Boost? psycho rxp's Avatar
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    Lower RPM, and boost will always be safer, than higher RPM, & boost.

    But, at 8,000 rpms u will need a much taller prop, than a higher RPM limited Ski.

  4. #4
    GRF + DashPac:) seadoo02xp's Avatar
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    Ya I agree your gonna need a huge prop to keep it at 8000. It would be cool though to have a ski setup like that.

  5. #5
    West Texas RXP skoepp's Avatar
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    Maybe the dual prop would have best luck with reducing the rpms without killing the hole shot with an overly pitched prop.

  6. #6
    A cone stuffer may help.

    Andy

  7. #7
    RXP 260 X Short Course Veteran RXP244's Avatar
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    You are not going to be able to prop it tall enough to keep your RPM that low. I am running 18-20psi through a Seadoo pump with a blade pitched to the point of being ridiculous and I struggle to keep rpm under 9000rpm. When I come unhooked I see peaks of over 10000rpm! Big tall props will also raise the pump pressure, which you also don't want.

  8. #8
    boost junkie skidoochris's Avatar
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    IMO your going to have big deto problems with out timing control
    stock SC timing maps are not turbo friendly at lower rpms and big load
    if your at 16 psi now @ 7000 your already on the edge
    big boost at the higher rpms you are less likely to deto

  9. #9
    Quote Originally Posted by whittlebeast View Post
    What are you running for boost control?

    Andy
    Waste gate with 15 psi spring max so i see it creeps to 16 at times but i let it be.

  10. #10
    Quote Originally Posted by psycho rxp View Post
    Lower RPM, and boost will always be safer, than higher RPM, & boost.

    But, at 8,000 rpms u will need a much taller prop, than a higher RPM limited Ski.
    i got me a skat 15.5-22.5 and so far so good have not hit the rev limiter, i think i can produce the 20-22 psi at less than 9000 rpm since my gate is opening a lot sooner to control the desire boost, i will re-enforce my stock intake (plastic) to test, is there anything i should be looking for to be break? fly wheel bolts? intake/exhaust valves (i have riva springs).

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