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Official Show your Birds thread!

This is a discussion on Official Show your Birds thread! within the Firebird / WS6 forums, part of the Vehicle Specific category; Originally Posted by Ant71130 LTs help you steer clear of police, just in a different way Tough to out run ...

  1. #6161
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    Quote Originally Posted by Ant71130 View Post
    LTs help you steer clear of police, just in a different way
    Tough to out run a radio, but I was also concerned with clearance. Clearance concerns are also the reason the exhaust is 2.5", instead of 3".

  2. #6162
    Senior Member Too Fast's Avatar
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    I gained cleanance with my Hookers/ORY. I can fit a coke can upright under the headers with about 1/8'' to spare, and can almost fit it under my ORY. Car is not lowered, tho, and we have no emissions checks.

  3. #6163
    Member Ant71130's Avatar
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    Quote Originally Posted by lees02ws6 View Post
    Tough to out run a radio, but I was also concerned with clearance. Clearance concerns are also the reason the exhaust is 2.5", instead of 3".
    Lol I know, was just joking. The whole exhaust is 2.5? Wasn't it factory 2.75"? Mine's lowered quite a bit with a 3" and I don't really have too many clearance issues. Just need to drive slowly and at an angle over some things. Certainly wouldn't warrant the performance/sound decrease for me to change

    Quote Originally Posted by Too Fast View Post
    I gained cleanance with my Hookers/ORY. I can fit a coke can upright under the headers with about 1/8'' to spare, and can almost fit it under my ORY. Car is not lowered, tho, and we have no emissions checks.
    Yeah but lowering to most people takes precedent over even SFCs lol

  4. #6164
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    Quote Originally Posted by Ant71130 View Post
    Lol I know, was just joking. The whole exhaust is 2.5? Wasn't it factory 2.75"? Mine's lowered quite a bit with a 3" and I don't really have too many clearance issues. Just need to drive slowly and at an angle over some things. Certainly wouldn't warrant the performance/sound decrease for me to change


    Yeah but lowering to most people takes precedent over even SFCs lol
    Yes, the stock system is 2.75". 3" would sound better, here's some informative info from that other ls1 site:

    Hey guys I just got done reading a good article in the May 2005 issue of Popular Hot Rodding Magazine. The article was written by David Vizard who seems to be one of the most accredited and respected people in the automotive performance world. In the article he stated that CFM is a great way to help develop a zero loss exhaust system. For zero loss a exhaust must flow 2.2 CFM per horsepower(This means less than 1% of total power produced by the engine is lost due to back pressure.). From reading the article I think that a lot of people that see gains when going from a 2.5” exhaust system to a 3” dual system see them because the muffler on the 2.5” system didn’t flow enough for their application. David stated that per square inch of exhaust tubing there is 115 CFM of flow. So plugging some numbers into the good ole TI-89….. ((3.14 * radius^2)*115[*2 for a dual exhaust system])/2.2 = Max hp supported with zero loss

    A 2.75” (stock) single system is good for a 310hp engine with zero loss…
    A 3” Single system is good for a 370hp engine with zero loss…
    A 3.5” Single system is good for a 503hp engine with zero loss…
    A 4” Single system is good for a 657hp engine with zero loss…
    A 2.25” dual system is good for a 457hp engine with zero loss…
    A 2.5” dual system is good for a 513hp engine with zero loss…
    A 3” dual system is good for a 812hp engine with zero loss…

    Now these numbers are assuming that everything else is set up perfectly. The muffler must flow as much as the open pipe or more to get zero loss at the listed hp levels. He also states that using a muffler with a larger inlet/outlet diameter than your exhaust pipe is a great way to get more out of a smaller diameter system since the muffler flow will be able to match the straight pipe flow. Now there are many other things to consider when designing an exhaust system but I figured this would give a great foundation to build on.

    Just a side note that he stated that I thought was neat... “Just as fish don’t feel the weight of water, we don’t readily appreciate the weight of air. Just to set the record straight, a cube of air 100 feet square will weigh 38 tons!”

    Hopefully I’ll get some more understanding of flow in a closed space in my fluid dynamics class next semester.

    - OldSchoolSS

  5. #6165
    Member Ant71130's Avatar
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    Interesting, is yours a dual system?

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    Junior Member Thunda's Avatar
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    Good story, and great info for us all.

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    Junior Member z-maro's Avatar
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    Here is my new Hawk




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    Member Ant71130's Avatar
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    Quote Originally Posted by z-maro View Post
    Here is my new Hawk

    Click for full size

    Click for full size
    Nice lookin' car man. Take care of her.

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    Senior Member 2001camaroSS's Avatar
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    Quote Originally Posted by z-maro View Post
    Here is my new Hawk

    Click for full size

    Click for full size
    looks very clean. nice find!

  10. #6170
    Yeah baby! Yeah! silverWS6's Avatar
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    Quote Originally Posted by z-maro View Post
    Here is my new Hawk

    Click for full size

    Click for full size
    Alright, fuck it.

    I'm selling all my cars and buying one of these!!
    mbmta99 likes this.

  11. #6171
    Senior Member 2001camaroSS's Avatar
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    Quote Originally Posted by silverWS.6 View Post
    Alright, fuck it.

    I'm selling all my cars and buying one of these!!
    Do it!

  12. #6172
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    Quote Originally Posted by z-maro View Post
    Here is my new Hawk

    Click for full size

    Click for full size

    NICE! Very Nice.

  13. #6173
    Last of the Breed j nix's Avatar
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    What?

    Quote Originally Posted by silverWS.6 View Post
    Alright, fuck it.

    I'm selling all my cars and buying one of these!!
    Get rid of your WS6? Are you crazy?

  14. #6174
    Junior Member z-maro's Avatar
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    Thanks everyone!

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  16. #6176
    Senior Member Too Fast's Avatar
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    Looks great Thunda! Is that a '75 also?

  17. #6177
    Mid-West Member Obsession's Avatar
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    Quote Originally Posted by Too Fast View Post
    Looks great Thunda! Is that a '75 also?
    I think it is a "76" the "75" had black rubber bumbers very nice I has a "73" 455 SD

  18. #6178
    Senior Member Too Fast's Avatar
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    Is the '73 a SD Trans Am or Formula? Is it M4? Saw some nice 1st gen drag Firebirds at a Nostalgia drag race today in Muncie (ever heard of a Muncie 4 spd lol) IN today. As well as some early 2nd gens and Arnie the Farmer Beswick was there with Tameless Tiger.

  19. #6179
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    NAVY BLUE METALLIC
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    Not a great pose but I just finish washing it

  20. #6180
    **Te@M fBoDy** fbodyNATION's Avatar
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    Quote Originally Posted by fbodyNATION View Post
    Click for full size
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    sorry LoL!

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