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  1. #1

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    What can these new 4 stroke motors take RPM wise?

    I was taold about a stock internal motor making 17lbs of boost turning 9500. How much is to much?


  2. #2
    Yellow93's Avatar
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    Quote Originally Posted by Lvnspeed View Post
    I was taold about a stock internal motor making 17lbs of boost turning 9500. How much is to much?
    ... that's a bomb with a very short fuse!

  3. #3
    Whats that whistling noise? jtskier11's Avatar
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    Im wouldnt push mine past 15-16 pounds or 8700rpm.

  4. #4
    fx160's Avatar
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    about 8,500 is considered safe for stock internals
    running boost of 18 pound and over seems to find the weak links as well

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