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How big before piston gets friendly with valves?

This is a discussion on How big before piston gets friendly with valves? within the Internal Engine forums, part of the LSx Technical Help Section category; How big of a cam can I go in a stock LS1 before the piston gets too friendly with the ...

  1. #1
    Race cars have a clutch redss454's Avatar
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    2000 Z28

    How big before piston gets friendly with valves?

    How big of a cam can I go in a stock LS1 before the piston gets too friendly with the valves? I was looking at a Thunder Racing Cheatr cam (214/230 .601/.575 117 LSA). This would be my first real mod to the car, so I am a little hesitant. Think I'll be okay?

    Chris

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    member since may 2000 nhraformula's Avatar
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    black
    2000 nhra edition formula

    many people run the cheater cam, youll be fine. just get dual springs
    2000 nhra edition formula
    a few bolt ons, 379 rwhp
    11.96 @113.25

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    Member TACE02's Avatar
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    ASC #753
    2002 Collector's Edition

    I would hope it would be ok. I have a couple friends running the T-REX on stock heads (of course beefed up valvetrain) and stock block, and have no clearance issues. numbers are around 242/248 - .608/.612 - 110 lsa for a T-REX.

    And if you're curious about it, just call Thunder Racing and ask. They will answer you, honestly.

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