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How Much Can An Ls1 Block Handle?

This is a discussion on How Much Can An Ls1 Block Handle? within the Internal Engine forums, part of the LSx Technical Help Section category; I Am Looking To Beef Up My Ls1, How Much Horsepower Can The Block Take?...

  1. #1
    LS1-TA schrysler's Avatar
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    How Much Can An Ls1 Block Handle?

    I Am Looking To Beef Up My Ls1, How Much Horsepower Can The Block Take?
    1998 Trans Am Vert, M6, Soon to be full of goodies......

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    King 0f n00bz shady milkman's Avatar
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    blacker than wesleysnipes
    98' trans am

    the block can take some serious abuse ups of 1000+ internals are a different story..but if you beef up the internals and ect...but heat is the big problem that would cause the ls1 block's demise

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    Member danziger's Avatar
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    A stock bottom-end will take 600rwhp no problem. The block and crank can take upwards of 900rwhp. The pistons and especially the ring-lands are the weakest link. Bear in mind that those numbers can change with high cylinder-pressures (nitrous) and high-rpm.

  4. #4
    LS1-TA schrysler's Avatar
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    I am looking to do a complete over hall with forged internals and then some serious boost what would be the best kit to do this with? (internals)

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

    I read an article some time back of a guy who bought a 98 TA with 120,000 miles on it. threw a turbo on it and tried to blow the motor so he could throw in a brand new motor setup that he had built. The only thing internally he changed was the rockers. over 140 quarter mile passes and 14,000 miles later boosting between 12-15 PSI. He finally just gave up and did the motor swap cause he couldn't blow up that stock LS1 block...LOL. He was running low 10s, high 9s every pass.

    So I am guessing it takes A LOT. or just some really bad luck. And with forged internals, hmmm give her all you can.

  6. #6
    LS1-TA schrysler's Avatar
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    What Would Be A Good Set Up Internally For A Nasty Turbo? What Is The Best Displacement If I Am Going To Be Gutting Out The Block?

  7. #7
    Member danziger's Avatar
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    Quote Originally Posted by schrysler View Post
    What Would Be A Good Set Up Internally For A Nasty Turbo? What Is The Best Displacement If I Am Going To Be Gutting Out The Block?
    Are you using the factory LS1 block? What size turbo(s)? You could build a nice forged 347 for fairly cheap that would handle some serious HP. What kind of budget?

  8. #8
    LS1-TA schrysler's Avatar
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    What$ Do You Think I Could Do The 347 For?

  9. #9
    Member danziger's Avatar
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    Check with the sponsors, but you could probably work something out for a couple grand...

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