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open cut out,the good and bad

This is a discussion on open cut out,the good and bad within the External Engine forums, part of the LSx Technical Help Section category; What are the advantages and disadvantages of a open cut out.I just uncapped my cut out and I cant stand ...

  1. #1

    open cut out,the good and bad

    What are the advantages and disadvantages of a open cut out.I just uncapped my cut out and I cant stand the raspy sound around the 2-3000rpm range after it is ok and it sounds great at idle.I have a 228 236 ,588,114 cam and ported heads,mac headers,ory and magnaflow catback.Do you gain power low rpm and high both.I have around 400 rwhp.

  2. #2
    Slow'er'Ass Mr. Luos's Avatar
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    Capped will have better numbers in the lower RPM's.
    Open will have better numbers in the upper RPM's.

  3. #3
    Ok , thanks. Is it common for it to be raspy when taking off around 2500 rpm ? Anyone ?

  4. #4
    Senior Member 440 rwhp trans am's Avatar
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    yep mine is really raspy.

  5. #5
    SoCalZ28 Tech SoCalZ28's Avatar
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    looks like its time for an electric cut out

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    Quote Originally Posted by SoCalZ28 View Post
    looks like its time for an electric cut out
    You won't be sorry. Just mash the little button and count to three.

  7. #7
    Slow'er'Ass Mr. Luos's Avatar
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    Until I stop hearing about those electric cutouts leaking....I will stick with manual ones.

  8. #8
    no electric for me,just on cap it at the track.I like the sound of my exhaust going thru my magnaflow much better anyway.

  9. #9
    Senior Member INMY01TA's Avatar
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    Fwiw the Mac header set up itself is really raspy. I switched from Macs to long tubes last year and there's less rasp.

  10. #10
    Senior Member JonB's Avatar
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    Quote Originally Posted by Mr. Luos View Post
    Until I stop hearing about those electric cutouts leaking....I will stick with manual ones.
    I'm with you Mr. Lous i'd love one but not if its going to leak. I hardly ever close mine only on long highway trips or when I forget what my hooker catback sounds like. There's a very dramatic difference between the two its kinda nice my car can be mean and agressive or smooth and mellow.


    Are you running cats? If your not that is probably why you have so much rasp. With macs, cats and open cut out I have little to no rasp.
    05 PBM GTO
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    Sold 01 z28

  11. #11
    SoCalZ28 Tech SoCalZ28's Avatar
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    wow, hm. well, im still getting one

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