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Modified my exhaust but unsure if its safe???

This is a discussion on Modified my exhaust but unsure if its safe??? within the External Engine forums, part of the LSx Technical Help Section category; Hey guys I have a 2001 Camaro SS thats mostly stock other than an air lid and other minor things ...

  1. #1
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    Midnight Blue
    2001 Camaro SS

    Modified my exhaust but unsure if its safe???

    Hey guys I have a 2001 Camaro SS thats mostly stock other than an air lid and other minor things like a short throw shifter and stuff. I had the TSP catback exhaust with factory cats. But I decided to replace the cats with high flow magnaflow cats that had to be custom fabricated to fit under the car and it still wasn't loud enough so I cut the muffler off and im currently just running straight exhaust with the cats. Is this safe? I dont want to hurt the performance or backpressure on my car. But I do think it sounds much better now and its not raspy at all it actually has a much deeper tone now and just sounds alot meaner I think. Let me know your opinions or if you know anyone else that has done the same thanks.

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    Senior Member Zboner's Avatar
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    it will be fine

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    black, and black
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    exhaust

    if your in a non emmisions state now just lose the cats

  4. #4
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    Midnight Blue
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    Well yeah but that will def. hurt the backpressure and torque if I took the cats off too wouldnt it??? Besides I just spend about 400 bucks buying them and getting them installed.

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    I lika da Chevy's LETHALxLS1's Avatar
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    On my car the slp LM bullet(pretty much a straight pipe) decreased my torq. I could feel it big time. I put a diff muffler on and it feels right now.

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    What kind of muffler did you add? How does it sound now?

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    I lika da Chevy's LETHALxLS1's Avatar
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    BORLA XR-1 Race muffler 5" round x 15" long. It sounds so awsome! I am very happy with it. It provides just enough backpressure In my opinion. I was actually to the point where I was gonna cut the slp loudmouth off and buy a different cat back exhaust. I am so glad I didnt have to do that and waste money. They make them in many different dimensions to fit your application. Here is a link to the cheapest place I found them at + they dont charge shipping! http://www.performancecenter.com/pro...acing+Mufflers

    Here is the page of muffler choices:http://www.performancecenter.com/pro...Mufflers/0/0/0
    Last edited by LETHALxLS1; 08-19-2007 at 08:35 PM.

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    member since may 2000 nhraformula's Avatar
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    backpressure is a myth.
    i have long tubes, no cats going into a 3 inch exhaust.
    when i did the exhaust, i gained h.p and torque.
    2000 nhra edition formula
    a few bolt ons, 379 rwhp
    11.96 @113.25

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    I lika da Chevy's LETHALxLS1's Avatar
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    Well I know in my car with the LM resonator(pretty much a straight pipe) my car lost torq I dont care what you say. I could feel it.

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    member since may 2000 nhraformula's Avatar
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    Quote Originally Posted by BREAKxNECKxSPEED View Post
    Well I know in my car with the LM resonator(pretty much a straight pipe) my car lost torq I dont care what you say. I could feel it.
    my post was not directed at you, but unless you have had a dyno of before and after, the butt meter is not a guage of gained or lost power in small amounts like a lid or muffler.

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    I lika da Chevy's LETHALxLS1's Avatar
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    I am tellin you -I could feel the difference-I felt no difference with a lid though.

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    2002 Formula Firehawk 96z28's Avatar
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    when i wake up in the morning and drive my car it feels stronger. But this does not mean it gained or lost hp throughout the night. Like nhraformula said, unless you have before and after dynos then you really cant say you lost hp.

    Oh and nhra can i drive your car for the weekend?

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    LTX N20LT4's Avatar
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    Quote Originally Posted by nhraformula View Post
    backpressure is a myth.
    i have long tubes, no cats going into a 3 inch exhaust.
    when i did the exhaust, i gained h.p and torque.
    It's not all about the gain, but where you gain it at. Backpressure is no myth. If you run cutouts after the headers, or run a straight pipe in place of a muffler, you WILL lose low-end torque. Some people don't mind that, but some do. The gain in top-end power from either is not worth the loss in low-speed grunt in my opinion.

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    I lika da Chevy's LETHALxLS1's Avatar
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    Quote Originally Posted by N20LT4 View Post
    It's not all about the gain, but where you gain it at. Backpressure is no myth. If you run cutouts after the headers, or run a straight pipe in place of a muffler, you WILL lose low-end torque. Some people don't mind that, but some do. The gain in top-end power from either is not worth the loss in low-speed grunt in my opinion.

    I agree fully. And I dont need a fkin dyno to tell the difference either.

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    I lika da Chevy's LETHALxLS1's Avatar
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    Quote Originally Posted by 96z28 View Post
    when i wake up in the morning and drive my car it feels stronger. But this does not mean it gained or lost hp throughout the night. Like nhraformula said, unless you have before and after dynos then you really cant say you lost hp.

    Oh and nhra can i drive your car for the weekend?
    Your car feels stronger in the morning because its colder in the moring and its getting a colder charge of air-just like in the winter. If you dont know that much I dont know what to tell you.

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    LTX N20LT4's Avatar
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    Quote Originally Posted by BREAKxNECKxSPEED View Post
    Your car feels stronger in the morning because its colder in the moring and its getting a colder charge of air-just like in the winter. If you dont know that much I dont know what to tell you.
    +1. That's so obvious.

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    member since may 2000 nhraformula's Avatar
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    Quote Originally Posted by N20LT4 View Post
    It's not all about the gain, but where you gain it at. Backpressure is no myth. If you run cutouts after the headers, or run a straight pipe in place of a muffler, you WILL lose low-end torque. Some people don't mind that, but some do. The gain in top-end power from either is not worth the loss in low-speed grunt in my opinion.
    i never felt any low end loss of power when i did headers.

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    Quote Originally Posted by BREAKxNECKxSPEED View Post
    On my car the slp LM bullet(pretty much a straight pipe) decreased my torq. I could feel it big time. I put a diff muffler on and it feels right now.
    Thats only your mind playing tricks on you. The exhaust company I work for do tests (on the dyno) and in your situation, you gained more on top than you did on the bottom. You think you lost on the bottom because of what you gained on the top. and thats a FACT

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    I lika da Chevy's LETHALxLS1's Avatar
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    The fact is I dont care who does what-I lost torq and I could feel it period. Thats a FACT.
    I guess the SLP LM gives you 25+ HP like they say too huh? I dont think so. Of course an exhaust company isnt going to admit there is a downfall to buying their exhaust.
    Last edited by LETHALxLS1; 08-21-2007 at 06:48 PM.

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    2004 HEAD/CAM CTS-V 9t8z28's Avatar
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    Quote Originally Posted by BREAKxNECKxSPEED View Post
    The fact is I dont care who does what-I lost torq and I could feel it period.
    Yes, it is about what you do. I test these kinds of myth's, and you are wrong!

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