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Thread: more hp out of my 5.3l

  1. #11
    Join Date
    Oct 2012
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    20
    Quote Originally Posted by kerrige View Post
    I put the mods in order. Tune first. Those are steps. You are looking at a decent chance of valve train failure in the nearish future. Although some have gone 250-300k with a stock motor. A full valve train swap at the time you choose to swap the cam should help prolong its life another 200k.

    What's a good set of heads to put on it

  2. #12
    Join Date
    Sep 2008
    Location
    Arizona/Utah
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    3,939
    P&P stock heads(mild) WCCH speced heads,(wild) but no real point without a matching cam to be honest. That comes after everything minus FI.
    ECSB 2kSierra 2wd 4.8L-K&N-HPtuners-Calspeed LT's-Magnaflow-Tahoe20's-HankookRH06

    waiting to go in... 3.90s, 214/220cam

  3. #13
    Join Date
    Oct 2012
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    20
    Quote Originally Posted by kerrige View Post
    P&P stock heads(mild) WCCH speced heads,(wild) but no real point without a matching cam to be honest. That comes after everything minus FI.
    Which heads do you suggest?

  4. #14
    Join Date
    Mar 2010
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    Paris
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    305
    Factory heads.

  5. #15
    Join Date
    Mar 2010
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    Paris
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    305
    Use the search button, it works. Unless you state EXACTLY what you're wanting to accomplish, you're wasting our time.

  6. #16
    Join Date
    Aug 2009
    Location
    Michigan
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    98
    I wouldn't bother with heads on your higher mileage 5.3. Look into a junkyard 6.0 to start building instead, as your budget allows. Then once you're able to get other drivetrain and supporting mods in order, swap in the 6.0. Basically plug and play with a good tune.

    If for some odd reason you're going to be stubborn about it and stick with the 5.3, then you could just get an old blower kit like a radix or whipple you can find cheap these days since everybody else wants TVS/procharger or fmt, then boost that old motor til it dies, then swap.

    If not either of those routes just go with a looser converter (most fun mod you'll probably do, no joke, even without any power adders!), then cam, and tune.
    Most of the other bolt on stuff is garbage and over priced (like aftermarket cold air intakes or catback exhausts), unless you're going max effort and can afford to squeeze it all out.
    Shralp' it heavy.

    \\ '02 Sierra \V/ '01 Silvy //

  7. #17
    Join Date
    Mar 2012
    Location
    west bend, wisconsin
    Posts
    111
    "Don't worry I was just busy with a grappling tourney all day "
    kerrige do you train jiu jitsu too?!
    1999 chevy silverado Z-71- 5.3, CAI intake, catback, nelson tuned, lpp lt's, vette servo, e-fans.

  8. #18
    Join Date
    Sep 2008
    Location
    Arizona/Utah
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    3,939
    Quote Originally Posted by mattjones View Post
    "Don't worry I was just busy with a grappling tourney all day "
    kerrige do you train jiu jitsu too?!
    True story. I got my ass whooped though.
    ECSB 2kSierra 2wd 4.8L-K&N-HPtuners-Calspeed LT's-Magnaflow-Tahoe20's-HankookRH06

    waiting to go in... 3.90s, 214/220cam

  9. #19
    Join Date
    Mar 2012
    Location
    west bend, wisconsin
    Posts
    111
    hey that's all part of it! my coach gives my ego a check 5 nights a week. its the best hobby ive picked up in a while haha
    1999 chevy silverado Z-71- 5.3, CAI intake, catback, nelson tuned, lpp lt's, vette servo, e-fans.

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