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Horsepower

This is a discussion on Horsepower within the Firebird / WS6 forums, part of the Vehicle Specific category; How much horsepower does a 2001 Trans Am WS6 have?...

  1. #1
    Junior Member whiteflash's Avatar
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    2001 Trans Am WS6

    Horsepower

    How much horsepower does a 2001 Trans Am WS6 have?

  2. #2
    M6 King Hot Black Trans-Am's Avatar
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    09 EclipseGT 75 Chevy 4x4
    2001 Trans-Am 13 F-XT

    305 +-10 to rear wheels.

  3. #3
    someday joejenkinsglass's Avatar
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    98 formula

    i believe it is 325 at the flywheel and most people agree they were underated

  4. #4
    Junior Member whiteflash's Avatar
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    Thanks.

  5. #5
    386HP 373TQ jwindbigler's Avatar
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    1999 Trans Am 5.7L

    The WS6's were rated to have 340 at the fly. They had 320 if it were a firebird formula.

  6. #6
    car enthusiast djvaly's Avatar
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    yeah general number: ws6 305rwhp, non ws6 290-295rwhp. but it varies from the factory tune, some run rich some run lean making more power.

  7. #7
    386HP 373TQ jwindbigler's Avatar
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    1999 Trans Am 5.7L

    The formula's from 98-99 came with 305, the WS6's 320. But a good starting number would be about 270-280RWHP.

  8. #8
    car enthusiast djvaly's Avatar
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    Quote Originally Posted by jwindbigler View Post
    The formula's from 98-99 came with 305, the WS6's 320. But a good starting number would be about 270-280RWHP.
    they are all underrated my friend... ls1 engine are 350-365hp at crank.
    the difference in stock LS1 vette vs fbody and maros is that vette use a different A/F table than fbody and maros LS1s but still the same engine. I dynoed my 99 TA stock (I mean stock with paper filter) at 290-292rwhp.

  9. #9
    car enthusiast djvaly's Avatar
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    Quote Originally Posted by jwindbigler View Post
    The formula's from 98-99 came with 305, the WS6's 320. But a good starting number would be about 270-280RWHP.
    btw, is you 386hp at crank or rwhp?

  10. #10
    386HP 373TQ jwindbigler's Avatar
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    1999 Trans Am 5.7L

    I have 386RWHP. It was running a little lean too. I should have a little bit more now. Maybe 395RWHP. But dont have a dyno to show it. Here is my latest dyno.


  11. #11
    car enthusiast djvaly's Avatar
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    cool man good numbers , hey be careful if it's 14.5-15 A/F ratio you'll mess up/fry ya engine being lean. I tuned my down to 13.5 where it needs to be lost 6-8rwhp but not running lean any more.

  12. #12
    car enthusiast djvaly's Avatar
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    the trick is not to be lean nor rich, I hear 13.5 A/F is optimal for engine life span and perfomance longevity while not being under-tuned.

  13. #13
    386HP 373TQ jwindbigler's Avatar
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    1999 Trans Am 5.7L

    Mine peaked out at 14.46ish. I am getting it retuned. So as soon as I get it fixed I will redyno, and we will see where I am at.

  14. #14
    car enthusiast djvaly's Avatar
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    yeah you'll loose a few rwhp but it's better safe than sorry

  15. #15
    386HP 373TQ jwindbigler's Avatar
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    1999 Trans Am 5.7L

    Yeah...definately. But a few RWHP...you really wont be able to tell when you are that high.

  16. #16
    M6 King Hot Black Trans-Am's Avatar
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    09 EclipseGT 75 Chevy 4x4
    2001 Trans-Am 13 F-XT

    a couple of stickers will bring that lost power back!

  17. #17
    386HP 373TQ jwindbigler's Avatar
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    1999 Trans Am 5.7L

    Yup...I still have to put on the "sticker" (aniversary decal) on the passenger side. I am going to try and put a bandit style bird on a WS6 hood. Dont know how it will turn out.

  18. #18
    M6 King Hot Black Trans-Am's Avatar
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    09 EclipseGT 75 Chevy 4x4
    2001 Trans-Am 13 F-XT

    Quote Originally Posted by jwindbigler View Post
    ...I am going to try and put a bandit style bird on a WS6 hood. Dont know how it will turn out.
    I'm sure that'll net about 30HP.

  19. #19
    car enthusiast djvaly's Avatar
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    probably that hood is heavier than stock?

  20. #20
    Member TMR Arb's Avatar
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    99 Formula

    hahaha yeah stickers = hp!! don't forget those coffee cans too!

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