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  1. #1
    now greybat66
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    Red
    1998 trans am

    i have always wondered

    Does anybody know what the highest horsepower on a ls1 trans am is.Stock from the factory no bolt ons just factory stock. Thank you.

  2. #2
    Slow'er'Ass Mr. Luos's Avatar
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    Red Tint Jewelcoat
    2008 Trailblazer SS

    Highest rating was 325HP. Flywheel.
    Obviously...some have made that at the wheels stock.
    2008 Trailblazer SS
    Yank PTB3600, Kooks 1 7/8" LT's, 4" intake, E-fans, Magnaflow, Sonnax kit, tranny cooler, tune.
    Lowered, HID's, tinted.

    1999 Pontiac Trans Am WS.6 #1747 SOLD
    531.1 RWHP 481.3 FT/Pounds all motor.

  3. #3
    Senior Member jrc1122's Avatar
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    Liquid Red
    2009 Pontiac G8 GT

    Quote Originally Posted by Mr. Luos View Post
    Highest rating was 325HP. Flywheel.
    Obviously...some have made that at the wheels stock.
    I could be wrong but I think an SLP optioned out LS1 Camaro and maybe a fireahawk were "stock" rated more than that.. Can't remember the exact number -- I think it was 10-15 more HP?

    But we all know the LS1 is basically a 350 hp (crank) engine.

  4. #4
    Slow'er'Ass Mr. Luos's Avatar
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    Red Tint Jewelcoat
    2008 Trailblazer SS

    Quote Originally Posted by jrc1122 View Post
    I could be wrong but I think an SLP optioned out LS1 Camaro and maybe a fireahawk were "stock" rated more than that.. Can't remember the exact number -- I think it was 10-15 more HP?
    I forgot about the Firehawk. I guess they are technically a T/A.
    But yeah, overall they are all 350-360 at the crank.


    Who has the highest BONE STOCK dyno sheet here?? Might be a thread for the dyno section.

  5. #5
    Sold: LS1 '85 El Camino ls1camino's Avatar
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    2000 Grand Prix GTP
    2000 Trans Am WS6 M6













    OOOOOOOOOOOOOOOOOHHHHHHHHHHHH...you said "stock"...sorry, my bad

  6. #6
    Junior Member WSICK's Avatar
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    wood dale, il
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    97

    white
    1998 WS6 M6

    wow that looks sick!

  7. #7
    Slow'er'Ass Mr. Luos's Avatar
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    Red Tint Jewelcoat
    2008 Trailblazer SS

    Quote Originally Posted by WSICK View Post
    wow that looks sick!
    Really?

    I am the complete opposite. Keep it under the hood.

  8. #8
    Senior Member 01ws6er's Avatar
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    Red
    2001 Trash Can

    Quote Originally Posted by Mr. Luos View Post
    Really?

    I am the complete opposite. Keep it under the hood.
    Hater

    Though it does kill the beaty of the hood...

  9. #9
    Slow'er'Ass Mr. Luos's Avatar
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    Red Tint Jewelcoat
    2008 Trailblazer SS

    Quote Originally Posted by 01ws6er View Post
    Hater
    I hear that a lot.

    Much better ways to make the power and not hack up your stock hood.

  10. #10
    Pony Killer Insert's Avatar
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    Black
    2002 Camaro SS M6

    Quote Originally Posted by ls1camino View Post
    Click for full size

    Click for full size

    Click for full size

    Click for full size

    Click for full size

    Click for full size

    OOOOOOOOOOOOOOOOOHHHHHHHHHHHH...you said "stock"...sorry, my bad
    lol, yea "stock".... which option was this? i must have missed it when filling out the papers.

  11. #11
    Member muteki's Avatar
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    Electric Blue Pearl
    2001 Trans Am

    What about the Blackbird LE??? But, I don't know if it was an LS-1 in it.

  12. #12
    Senior Member INMY01TA's Avatar
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    Black
    2001 Trans Am (sold)

    Quote Originally Posted by Mr. Luos View Post
    I hear that a lot.

    Much better ways to make the power and not hack up your stock hood.
    I'm with ya. I'll bet Fireballs turbo LS1 TA will prolly run almost as fast as that thing does. http://www.ls1tech.com/forums/showthread.php?t=697142

  13. #13
    Firebird Encyclopedia 9T8W66's Avatar
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    Navy Blue Metallic
    `98 Formula M6 HdTp

    Quote Originally Posted by Mr. Luos View Post
    Really?

    I am the complete opposite. Keep it under the hood.
    I agree to me thats stuff is all for looks.
    Craig
    Semi Retired Street Racer
    2012 Lava Red Mustang GT Coupe Brembo/3.73's
    Build Date 3/17/11, Last Lava Red GT

    Gone but not forgoten
    NBM `98 Formula M6 HdTp
    1 of 1 Build Date 3/12/98

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