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How much to bore?

This is a discussion on How much to bore? within the Internal Engine forums, part of the LSx Technical Help Section category; I was wondering what GM reccommend for the maximum overbore on the LS2 and LS3 blocks?...

  1. #1
    Junior Member farmer_ron_99's Avatar
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    02 Trans Am WS6

    How much to bore?

    I was wondering what GM reccommend for the maximum overbore on the LS2 and LS3 blocks?

  2. #2
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    1998 Camaro Z28

    20 thousandths. or .020 I had an LS2 block bored .020 over and then i bought some GM oversized pistons from GMpartsdirect

  3. #3
    Veteran Hi-Po's Avatar
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    1999 TA WS.6

    Sonic testing is the only way to know how much you can safely remove. .020" would be fine, but it sure wouldnt hurt to check it out if wanting to go more.

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