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Thread: 1200 di

  1. #1

    1200 di

    hey guys i was wondering how much to bore my 1200 di engine to for more speed but i also want to maintane reliability at the same time


  2. #2
    ph2ocraft's Avatar
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    TOOO big and you could have a fuel supply problem??

  3. #3
    Quote Originally Posted by ph2ocraft View Post
    TOOO big and you could have a fuel supply problem??
    what????

  4. #4
    ph2ocraft's Avatar
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    I was saying IF you bore it too large and go with a larger sized piston you may not have enough fuel to keep it alive.

  5. #5
    Click avatar for tech links/info, donation request K447's Avatar
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    Quote Originally Posted by polaris_man View Post
    ... how much to bore my 1200 DI engine to for more speed but I also want to maintain reliability at the same time
    The Ficht fuel injection system does not have an air flow sensor. It won't know that you have increased the engine's air volume intake, so it will not increase the volume of fuel being injected.

    More air without more fuel means leaner operation, higher piston temperatures, possible engine damage.

    Without more fuel, you aren't going to get much more power from a displacement increase.

    If you want to maintain reliability on a Polaris Ficht engine, don't change anything internal to the motor.

  6. #6
    so not even shaving the heads?

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