Hellion top mount false knock issue’s

Discussion in 'Forced Induction - 5.0L V8 Engine' started by Richardcompgt, Apr 3, 2020.

  1. Richardcompgt

    Richardcompgt Member

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    Anyone with hellion top mount twin kit have false knock issues? I had them bad on 93. Went e85 and lowered the knock sensitivity, Still seeing 10* knock. Any common spots where the hot pipes hit that i’m missing?
    Tuned by PBD
     
  2. Cory S

    Cory S Well-Known Member

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    Somethings definitely hitting, or rattling for sure. Does it knock WOT only, certain RPM range etc?
     
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    Richardcompgt

    Richardcompgt Member

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    was under the car all weekend. Moved anything that looks like it’ll hit/ put cushion on anything that was close. It comes about 17% throttle. Iv tested with race gas/ lowering the boost its the same every time.

    the 2 hot pipes leaving the turbo are on the sway bar. But theres no way to move them or cushion them, they’re stiff in there not sure if that causes it.
     
  4. Dennisn

    Dennisn Well-Known Member

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    Get rid of the sway bar.

    If You still have it shut em off and only run good fuel. I spent months trying to chase it down. Was pissed when tuner I was using at the time was like no biggie gonna be on e85 anyways. I was like wtf!!!!!! I’m not kidding, months.
     
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    Richardcompgt

    Richardcompgt Member

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    PBD refuses to turn them off or lower them anymore then they are. I’ll be attempting to move the pipe off the sway bar tomorrow or cushion it. And i purposely switched e85 for them to turn them off!
     
  6. 3beeps

    3beeps Well-Known Member

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    I got rid of that front sway bar early on and haven't had any false knock issues. If you have exhaust pipes touching the sway bar, it's probably best to remove it.
     
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    Richardcompgt

    Richardcompgt Member

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    Was able to actually move them away. I found the driver side pipe touching the steering D3C55E89-EC31-40E4-BAA5-57A68CF1A026.jpeg
     
  8. DavidHuff

    DavidHuff Well-Known Member

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    How much difference does the car drive over factory stock with the front sway bar removed?
     
  9. StickShiftyFifty

    StickShiftyFifty Well-Known Member

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    Yea those down pipes are the only biggaboo that i dont like about this kit. I wrapped the down pipes and it fixed it. Thought about removing sway bar but i dont want to loose stiffness. I have PP car so sway bar is thicker than stock one, maybe swap for the stock one might work.
     
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    Richardcompgt

    Richardcompgt Member

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    I was able to move it off the sway bar. Found it touching by the steering column
     
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