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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

    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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