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Horrible Discovery!!

This is a discussion on Horrible Discovery!! within the External Engine forums, part of the LSx Technical Help Section category; yesterday i made a horrible discovery while i was taking off my wheels and changing my brake pads. the place ...

  1. #1
    Member NiteRiderWs6's Avatar
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    THE WS6 THAT COULD

    Horrible Discovery!!

    yesterday i made a horrible discovery while i was taking off my wheels and changing my brake pads. the place i bought my car from told me the exhaust was an slp dual dual exhaust. well i just so happen to look at the muffler and what does it say???? Flowmaster....now i dont know how much horsepower i could free up if i got rid of it but it sounds really good and seems to be making good power at the track for me. what exhaust should i look into if i want to run headers on down the road??

  2. #2
    Senior Member ss~zoso~ss's Avatar
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    yea thats really horrible....
    98' SS Convertible Camaro-76k-Build # 1471, Cragar SS rims, RK SFC's, MAC Panhard, LSX Tune, Shaner S3,
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    Senior Member NeeD4SpeeD's Avatar
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    Quote Originally Posted by ss~zoso~ss View Post
    yea thats really horrible....
    that sucks

  4. #4
    Member NiteRiderWs6's Avatar
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    Quote Originally Posted by ss~zoso~ss View Post
    yea thats really horrible....
    yea i guess from what everyone on here has filled my head with. i guess they say flowmasters are bad on LS1's??

  5. #5
    Pathelogical Liar BlackLT1Z28's Avatar
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    Quote Originally Posted by NiteRiderWs6 View Post
    yea i guess from what everyone on here has filled my head with. i guess they say flowmasters are bad on LS1's??
    You are correct.

  6. #6
    The Bandit Wesman's Avatar
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    Quote Originally Posted by NiteRiderWs6 View Post
    yea i guess from what everyone on here has filled my head with. i guess they say flowmasters are bad on LS1's??
    Apparently the 80 Series Flowmasters are the worst offenders. They are single in/dual out. Thats what I have on my car, but I'm going with true duals as soon as I can.

  7. #7
    Member C&Cbird's Avatar
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    Not all Flowmasters are bad, just the horrible 80 series. The 80 series sounds great, but isn't very good for flow.

  8. #8
    your parts guy!!! 1fastcamarosss11's Avatar
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    trans am 00 ws6
    1998 camaro ss vert

    just get a cut out.

  9. #9
    Quote Originally Posted by NiteRiderWs6 View Post
    it sounds really good and seems to be making good power at the track for me.
    That pretty much sums it up...

    And while the Flowmaster 80 series may not be the best flowing muffler available, you're not going to notice any real world power difference with another muffler on a stock or near stock car.

  10. #10
    Aw shucks. bluefields88's Avatar
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    damnitt, I have the 80 series. I love the sound, but I wanted some HP for my money! at least I got it installed for cheap by a family friend. dropped around 250 bucks. sigh, maybe I'll change it in a couple years. that way my parents wont bitch at me about it.

  11. #11
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    that totally sucks. Where did you get the car from?

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    Member 89LX's Avatar
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    Air in and exhaust out

    Given the mods you list I wouldn't worry with it for now. Air in and exhaust out are key in making HP. You go to headers and LS6 manifold I would do the exhaust then or soon after/before. IMO
    2000 Z28 M6, SLP Lid, SLP Bellows, SLP UD,
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  13. #13
    Member NiteRiderWs6's Avatar
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    THE WS6 THAT COULD
    Quote Originally Posted by 89LX View Post
    Given the mods you list I wouldn't worry with it for now. Air in and exhaust out are key in making HP. You go to headers and LS6 manifold I would do the exhaust then or soon after/before. IMO
    i have a

    3'' cutout
    LS6 intake
    SLP LID
    SLP Filter
    Shift Kit
    P&P TB

  14. #14
    Member NiteRiderWs6's Avatar
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    THE WS6 THAT COULD
    Quote Originally Posted by 99blueZ View Post
    that totally sucks. Where did you get the car from?
    an all sports car delarship called mid-america automart... they have nothing but Camaros,Corvettes,Trans Ams and Cobras

  15. #15
    Member 89LX's Avatar
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    Free flowing catBack

    Given your mods I would now get a known free flowing catBack.

  16. #16
    Speak the truth jad628's Avatar
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    Quote Originally Posted by NiteRiderWs6 View Post
    yesterday i made a horrible discovery while i was taking off my wheels and changing my brake pads. the place i bought my car from told me the exhaust was an slp dual dual exhaust. well i just so happen to look at the muffler and what does it say???? Flowmaster....now i dont know how much horsepower i could free up if i got rid of it but it sounds really good and seems to be making good power at the track for me. what exhaust should i look into if i want to run headers on down the road??
    Look at it this way, a Flowmaster may be holding you back 5 hp, 10 tops. You didn't mention if you've done free mods. I promise you that the TB coolant by-pass, air box mod, and especially removing that 1.5 inches of EGR tube (98-00) in the TB/(LS1)intake air flow will more than make up for the Flowmaster "loss".

    And by that I mean as compared to more free-flowing muffler systems. Over stock, it's not even an issue.

    The free mods are just about free, (maybe $5 for the TB by-pass stuff). How much is a new cat-back system?

    My opinion is keep it for now, do all the free mods, and then start saving for a new exhaust system, from the headers back, and do that all at once.

    Edit: Sorry, I went back and saw you have an LS6 intake. The EGR doesn't apply now.
    Last edited by jad628; 04-20-2007 at 05:18 AM.

  17. #17
    your parts guy!!! 1fastcamarosss11's Avatar
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    trans am 00 ws6
    1998 camaro ss vert

    Quote Originally Posted by NiteRiderWs6 View Post
    i have a

    3'' cutout
    LS6 intake
    SLP LID
    SLP Filter
    Shift Kit
    P&P TB
    you have a cut out all ready so you should be fine, where is it at location wise under the car? if it's electric you good it evens out.

  18. #18
    Member C&Cbird's Avatar
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    Getting a cutout is a much cheaper and easier alternative to getting another muffler, unless you just hate the sound of the flowmaster.

  19. #19
    Member NiteRiderWs6's Avatar
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    THE WS6 THAT COULD
    Quote Originally Posted by 1fastcamarosss11 View Post
    you have a cut out all ready so you should be fine, where is it at location wise under the car? if it's electric you good it evens out.
    its under the rear passenger and it was electric but i decided i didnt need the electric motor i just decided to leave the cutout open.

  20. #20
    your parts guy!!! 1fastcamarosss11's Avatar
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    trans am 00 ws6
    1998 camaro ss vert

    Quote Originally Posted by NiteRiderWs6 View Post
    its under the rear passenger and it was electric but i decided i didnt need the electric motor i just decided to leave the cutout open.
    that is where your sound is coming from.

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