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Thread: Exhaust noise hi RPMs

  1. #1
    Garrett booster
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    Exhaust noise hi RPMs

    Running into a Hi RPM exhaust noise in my 24 hours of lemons race car. It’s 2.0 DOHC swapped with a TTI shorty header. From about 4,500 RPMs on it gets really loud. I want to do practice track days at a track with a 98 Db limit so I need to get this figured. The header has a donut set up going to a flex pipe. Could engine rotation be causing the donut to loose seal? What are my options?

  2. #2
    turbo addict
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    Re: Exhaust noise hi RPMs

    What muffler are you using?

  3. #3
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    Re: Exhaust noise hi RPMs

    Quote Originally Posted by tryingbe View Post
    What muffler are you using?
    A walker sound FX. Looks exactly like the stock one only it’s a lot longer ( hardly fits) with a a 2.25 inlet as that’s what I’m running back from the header.

  4. #4
    turbo addict
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    Re: Exhaust noise hi RPMs


  5. #5
    turbo addict
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    Re: Exhaust noise hi RPMs

    buddy cuts up his sound fx muffler..I note the amount of noise coming from the muffler as he sticks his fingers in ..it sounds like it would be more a tin can sound amplifier at 4 grand than a muffler to me..

    https://www.youtube.com/watch?v=omqipkMMWD0

  6. #6
    Garrett booster
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    Re: Exhaust noise hi RPMs

    It sounds much louder than that. Of course he wasn’t revving it really high

  7. #7
    turbo addict
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    Re: Exhaust noise hi RPMs

    Quote Originally Posted by Barraguy View Post
    It sounds much louder than that. Of course he wasn’t revving it really high
    Got any other muffler laying around to test?

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