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Open Headers?

This is a discussion on Open Headers? within the External Engine forums, part of the LSx Technical Help Section category; needle for what?...

  1. #21
    Senior Member M-Ten's Avatar
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    needle for what?

  2. #22
    Moderator Firebirdjones's Avatar
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    As far as performance on these cars,,,I couldn't say with single style systems,,,,but I have cutouts on 3 other cars of mine,,,,all of which have true dual exhaust systems,,,and they are very effective when opened at the track.

    Depending on which car I take, I can see as much as 2 tenths and 2 mph opening the cutouts verses running through the mufflers.

    On a 4th gen,,,,If you can run an off road Y-pipe then I think the best place for cutouts would be a pair of them in the Y-pipe on each side before the system funnels down to a single pipe,,,,it would seem to be more beneficial,,,acting as a dual system when the cutouts are open,,,thats how I would do it on a 4th gen with single systems. Seen a few at the track that way and owners seemed to like it.

  3. #23
    Senior Member 35thAnniZ28's Avatar
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    eating bulldog
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    Quote Originally Posted by M-Ten View Post
    needle for what?
    sorry the gas gauge

  4. #24
    Senior Member M-Ten's Avatar
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    oh ok gotcha

  5. #25
    I Like It Stroked 99Ls1fever's Avatar
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    1999 Z28 408 Stroker M6

    i run my qtp long tubes with about three feet od striaght pipe into muffler s and dumps and it works well for me....

  6. #26
    Powerstrokin LT1 > LS1's Avatar
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    i had this argument with a guy on youtube, because he said that running a sport bike with the muffler off will kill the engine. there is a lot of piping thats comes down, so burning a valve would not happen, but he then started some crap about how turbos don't need any backpressure, but told him they do, because it allows the turbo to spool up quicker.


    who's right?

  7. #27
    Moderator Firebirdjones's Avatar
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    Quote Originally Posted by nitrorustler41 View Post
    i had this argument with a guy on youtube, because he said that running a sport bike with the muffler off will kill the engine. there is a lot of piping thats comes down, so burning a valve would not happen, but he then started some crap about how turbos don't need any backpressure, but told him they do, because it allows the turbo to spool up quicker.


    who's right?
    The old problem of turbos spooling up quicker is just that,,,,an old problem that has been resolved with new designs, they spool so much quicker now than turbo's of even just 5 years ago,,,,that spooling problems are very small or non existent now.

    You both are right,,,,depending on which era we are talking about Years ago yes,,,,,nowadays,,,not so much.

    Although I found that with my Typhoon,,,the more I freed up the exhaust the quicker it would spool and the more boost it had,,,,to a point where it would overbooost and cause other problems,,,,ooops.

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