Help - Engine making weird noise above 4000 rpm near full load

Discussion in 'RT/10 and GTS Discussions' started by sbviper, Apr 6, 2019.

  1. sbviper

    sbviper Viper Owner

    Posts:
    5
    Joined:
    Feb 15, 2008
    Location:
    Columbus, Indiana
    I have a 98 Viper GTS. Near end of my last track event it started making a weird noise above 4000 rpm near full load. No noise at all below 4000 rpm even at full load. This is very repeatable.

    video link (not my account):
    https://www.facebook.com/1000227137...886538033/?type=2&video_source=user_video_tab

    Notes: Has ~50k miles. I have a roe supercharger set at 5 psi. Have had for years. I have changed spark plugs, no help. If anyone has seen this issue before please let me know. Took it to a local shop and they couldn't figure it out either- they recommended taking to a place with dyno to make easier to reproduce in a shop setting. Also interested in a good place nearby to get the issue fixed (I live 45 minutes south of Indianapolis). Can sometimes get to happen briefly during neutral throttle snap, but is very sporadic.
     
    Last edited: Apr 6, 2019
  2. Steve-Indy

    Steve-Indy VCA Venom Member - Great Lakes

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    Oct 2, 2000
    Location:
    Zionsville,IN. USA
    You might give me a call when you get a chance.
    317-402-9013
     
  3. Steve-Indy

    Steve-Indy VCA Venom Member - Great Lakes

    Posts:
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    Joined:
    Oct 2, 2000
    Location:
    Zionsville,IN. USA
    Good to speak with you.
    I spoke with Tom Sessions, and sent him this link.

     
  4. jrkermode

    jrkermode Viper Owner

    Posts:
    563
    Joined:
    Jan 14, 2002
    Location:
    Los Altos, CA, USA
    Hard to tell exactly from the video, but, I occasionally get a similar sort of noise from my Gen 2. Ted May (very experienced Viper tech) traced that to a resonance (rattling) in the heat shielding around the side pipes. Try thumping the rockers with the your sneakers and see if you hear the same sound.
     

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