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Blew 3 pistons, twice.

This is a discussion on Blew 3 pistons, twice. within the Internal Engine forums, part of the LSx Technical Help Section category; So I bought a Vortech centrifugal supercharger for my stock (besides headers and exhaust) 98 trans am with 62000 miles. ...

  1. #1
    Junior Member
    Join Date
    Apr 2007

    1998 Trans Am WS6

    Blew 3 pistons, twice.

    So I bought a Vortech centrifugal supercharger for my stock (besides headers and exhaust) 98 trans am with 62000 miles.
    Got it dyno tuned with 405 to the tires at 5psi.
    Long story short I blew 3 pistons.
    So I put 3 stock pistons back in it and about a month later they blew again.

    Should I put new forged pistons and hardened pushrods back in it?
    Should I put in heads and/or a boost cam back in it while i have it apart?
    Any other supporting mods I should maybe get so this doesnt happen again?
    What would you guys do?

    Would greatly appreciate any help.

  2. #2 Tuner
    Frost's Avatar
    Join Date
    Jul 2007
    Richmond VA
    2,415 Sponsor
    GM Tuner

    get it properly tuned; this is likely why it broke.

  3. #3
    Senior Member INMY01TA's Avatar
    Join Date
    Jan 2006
    The great red state of MD.

    2001 Trans Am (sold)

    I'm no expert on FI but I'm sure lower compression 6.0 liter truck heads wouldn't hurt.

  4. #4
    Powerstrokin LT1 > LS1's Avatar
    Join Date
    Dec 2007
    Aurora IL

    Trans Am owner

    I would watch your A/F ratio..... also, get a real tune, and try again with stock bottom end.

    5 psi aint enough to be throwin pistons like that

    but if you have the funds, throw a solid bottom end in it, and rake up the boost.....its game time!!!!!!!!!!!

  5. #5
    Grand Imperial Wizard Sarge's Avatar
    Join Date
    Aug 2005
    Texas Department of Corrections
    Retired Outlaw Sum Bitch

    Man that is a tune issue. 5psi aint squat. Your going lean under boost. Can you post your dyno tune sheet? What size injectors you running? Stock Fuel Pump?

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