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  1. #1
    SLASHER's Avatar
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    What's the max safe boost of the 4 tec SC engine

    I know this has been asked before ,

    I been told that the max safe boost level of the SC 4 tec is 18psi ..

    I'm running turbo on my 2011 RXTX , what are the other turbo guys running with stock Pistons ..


  2. #2
    boost junkie skidoochris's Avatar
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    stock pistons/rods are pretty stout
    imo 18 is a little low

  3. #3
    Bob 1tommygunner1927's Avatar
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    Too much ignition timing is the cause of death with high boost. You need the ability to data-log and record/read knock for all cylinders. Also, if the valves are stock limit rpm to 8800.

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  5. #4
    SLASHER's Avatar
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    It will be logged ...

    I seen ProX run 24psi , WSM 24+ ...

  6. #5
    www.eastcoastpwc.net Scott's Avatar
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    Im CP and pushing 20 yesterday, I know a stock piston ski is in the works locally Guess we'll find out soon enough

  7. #6
    Branden's Avatar
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    Quote Originally Posted by 1tommygunner1927 View Post
    Too much ignition timing is the cause of death with high boost. You need the ability to data-log and record/read knock for all cylinders. Also, if the valves are stock limit rpm to 8800.
    x100 its usually the cause of death in 90+% of failures

  8. #7
    imp0ster's Avatar
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    lower 20s. Stock setup is strrrooonnnggg and kinda heeaaaavvyyyy

  9. #8
    Quote Originally Posted by imp0ster View Post
    lower 20s. Stock setup is strrrooonnnggg and kinda heeaaaavvyyyy

    Air intake will crack at this pressure usually too...

  10. #9
    Scott did you write CP pistons?

    I wonder how much "more" boost you can run in a turbo setup if you use CP pistons with lower compression( the ones riva sells)
    And since it is lower compression, how much more do you need to boost to get the same HP as on a engine with "normal" compression.

  11. #10
    www.eastcoastpwc.net Scott's Avatar
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    Quote Originally Posted by VTECH.SE View Post
    Scott did you write CP pistons?

    I wonder how much "more" boost you can run in a turbo setup if you use CP pistons with lower compression( the ones riva sells)
    And since it is lower compression, how much more do you need to boost to get the same HP as on a engine with "normal" compression.
    Yes sir, cp 8.4:1 and 10 over

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