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  1. #1

    How high on RPMs can a stock 4 tec go?

    Want To get a little more speed out of my GTX supercharged.Heard Of modified ECUs. Any Input or Suggestions??


  2. #2
    Branden's Avatar
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    i have been spinning my stock motor to 9k for a while now with nothing more than good springs and retainers.

  3. #3
    WOW!!!! How did you get to 9g??

  4. #4
    OK. I see your Specs

  5. #5
    boost junkie skidoochris's Avatar
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    9K is common around here
    now 10K is spinning ...

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