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  1. #1
    JgDieselPerformance's Avatar
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    How much boost and rpm can hold stock svho engine?

    I like to know how much boost and rpm the stock rotary assembly can hold and still reliable for as recreational ?
    Also what is the weak link, the rods or piston?


  2. #2
    Click avatar for tech links/info K447's Avatar
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    With aftermarket lightened valve retainers or entirely stock valve train?

    How do you define ‘reliable’ for a recreational supercharged PWC?

    Engine lifespan before rebuild of 50-100 hours, several hundred running hours, or perhaps a thousand hours?

  3. #3
    ptscon's Avatar
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    I think he's asking at what psi the block gets windowed.

  4. #4
    Click avatar for tech links/info K447's Avatar
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    Quote Originally Posted by ptscon View Post
    I think he's asking at what psi the block gets windowed.
    There is quite a span between ‘reliable’ and ‘windowed’.

  5. #5
    JgDieselPerformance's Avatar
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    Quote Originally Posted by K447 View Post
    With aftermarket lightened valve retainers or entirely stock valve train?

    How do you define ‘reliable’ for a recreational supercharged PWC?

    Engine lifespan before rebuild of 50-100 hours, several hundred running hours, or perhaps a thousand hours?
    With aftermarket valve train mod( valve, spring & retainer )
    How much boost can hold for use the all day.

  6. #6
    mittens's Avatar
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    20 psi, and 9500 rpms with retainers.

  7. #7
    MSX 150 guy lives on Mr. GP1800's Avatar
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    1.21 gigawatts

  8. #8

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    Just remember that whatever the rev limit is, the motor will spin much higher when you come unhooked. My ski hit 10,261 rpm on my last datalog.

  9. #9
    mittens's Avatar
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    Quote Originally Posted by Reaper9789 View Post
    Just remember that whatever the rev limit is, the motor will spin much higher when you come unhooked. My ski hit 10,261 rpm on my last datalog.
    What is your limiter at?

  10. #10

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    Quote Originally Posted by mittens View Post
    What is your limiter at?
    9500. Im running supertech springs and retainers and HO cams.

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