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Headers, dents effect on power output.

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    Headers, dents effect on power output.

    I watched a video with an engine on a dyno, and they progressively dented header tubes in while retesting HP & TQ on the dyno. The results might surprise you. Check put the video, it is great if you are a motor head, and have wondered about this issue.

    1981 GS1100E
    1982 GS1100E



    "It is the mark of an educated mind to be able to entertain a thought without accepting it." Aristotle


    #2
    That's a beast of a motor.
    "Thought he, it is a wicked world in all meridians; I'll die a pagan."
    ~Herman Melville

    2016 1200 Superlow
    1982 CB900f

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      #3
      Opens my choices for beat up old headers!
      "Only fe' collected the old way, has any value." from His Majesty O'Keefe (1954 film)
      1982 GS1100G- road bike, body, seat and suspension modded
      1990 GSX750F-(1127cc '92 GSXR engine) track bike, much re-engineered
      1987 Honda CBR600F Hurricane; hooligan bike, restored

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        #4
        Saw that a couple of months ago. I was particularly amused that one test actually showed a small INCREASE in power.

        .
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        mine: 2000 Honda GoldWing GL1500SE and 1980 GS850G'K' "Junior"
        hers: 1982 GS850GL - "Angel" and 1969 Suzuki T250 Scrambler
        #1 son: 1986 Yamaha Venture Royale 1300 and 1982 GS650GL "Rat Bagger"
        #2 son: 1980 GS1000G
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        Want a copy of my valve adjust spreadsheet for your 2-valve per cylinder engine? Send me an e-mail request (not a PM)
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          #5
          I should bash the other three on my 550 to match my #1 pipe which has a pretty good dent.


          Life is too short to ride an L.

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