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  1. #1
    Millertime44's Avatar
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    300sx - How far over bore can you go?

    Can't find the max bore specs, if anyone knows them can you pass them along?

    Also any advantage to boring this engine larger, or without porting and exhaust/carb mods does that not make any difference?

    Thanks!


  2. #2
    My name is Sean and I am addicted to STXs smokeysevin's Avatar
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    I think its 84.5mm for maximum, I know you can get 86mm pistons for the zx12r but the blocks are different. I think Macc Racing made a 1600 kit for the 250/60/15f

    Sean

  3. #3
    Millertime44's Avatar
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    Quote Originally Posted by smokeysevin View Post
    I think its 84.5mm for maximum, I know you can get 86mm pistons for the zx12r but the blocks are different. I think Macc Racing made a 1600 kit for the 250/60/15f

    Sean

    Sorry, I mean a 1987 300sx standup. Standard bore is 76.0 mm.

    Thanks!

  4. #4
    john zigler's Avatar
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    typically 1mm over is the max.

    you probably will not find any larger pistons than that either.

  5. #5
    Millertime44's Avatar
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    Quote Originally Posted by john zigler View Post
    typically 1mm over is the max.

    you probably will not find any larger pistons than that either.
    Thanks John

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