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bore and stroke

This is a discussion on bore and stroke within the Internal Engine forums, part of the LSx Technical Help Section category; how big can i go on a stock ls1 aluminum block? i wanna do a 428 cube, 4.125" bore 4.000" ...

  1. #1
    Junior Member
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    red
    1998 trans am

    bore and stroke

    how big can i go on a stock ls1 aluminum block? i wanna do a 428 cube, 4.125" bore 4.000" stroke, then turbocharge it

  2. #2
    Slow'er'Ass Mr. Luos's Avatar
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    Red Tint Jewelcoat
    2008 Trailblazer SS

    You must have VERY deep pockets.

    Without sleeving it, you shouldn't bore the stock aluminum LS1 block.
    Sleeves get VERY expensive.

  3. #3
    Grand Imperial Wizard Sarge's Avatar
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    Retired Outlaw Sum Bitch

    Can it be done? Sure....will it last? Nope.
    LQ9 Iron Block and go have a blast....that is what it is built for.

  4. #4
    Veteran Hi-Po's Avatar
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    Black
    1999 TA WS.6

    Or LQ4 block. Only thing with that is having a lower compression to start with if your using stock internals because of the dished pistons. Ether way, the iron block what your going to need for your application unless you go with the LSX block for 2000$

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