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Boomy exhaust?

Discussion in 'Performance and Tuning' started by CreekDweller, Nov 10, 2019 at 7:30 AM.

  1. Nov 10, 2019 at 7:30 AM
    #1
    CreekDweller

    CreekDweller [OP] New Member

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    After several months of mostly lurking, on Wednesday night I took delivery of a 2020 MGM 1794. I'm still in the 'honeymoon' period with less than 200 miles so far but I have a question I hope someone has the answer to.

    I have the stock (regular) exhaust which seems to be very boomy at some RPMs, including highway speeds where it is steady and fairly annoying. It is not the tires. I believe it is the exhaust because the sound is distinctly coming from the rear of the truck and not the engine compartment. And it varies with engine speed so that sometimes it isn't even there. I wondered it the muffler or exhaust pipe might be making contact with the frame ....

    I thought there was a fairly recent post on this subject but I've done searches and can't find any posts about it. So, has anyone else had a boomy exhaust and if so, figured out how to get rid of it? Or might it be something else?
     
  2. Nov 10, 2019 at 7:34 AM
    #2
    AzureNightmare

    AzureNightmare F.N.G. (F*cks Not Given)

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    I came to this thread expecting you to be asking for recommendations on a new exhaust. I was all set to recommend DiryDeeds. Though, technically, I would still recommend asking @dirtydeeds because he's an exhaust guru.
     
    Last edited: Nov 10, 2019 at 7:44 AM
    Primalbryan, Sas, RLHOK and 2 others like this.
  3. Nov 10, 2019 at 8:41 AM
    #3
    17TundraDCEd

    17TundraDCEd New Member

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    Tailpipe resonator will make a Tundra with stock exhaust sound like a Prius. Speaking from experience on a previous Tundra.

    The OEM system does have some drone.

    That said, give it a little time, because I feel the engine does break in (mechanically and computer “learns”) with some miles and runs smoother, which also smoothes out the exhaust note.
     
  4. Nov 10, 2019 at 8:43 AM
    #4
    Danimal86

    Danimal86 What's a Dickfir?

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    Stock exhaust......boomy?
    I couldn't even hear anything from my stock exhaust.
     
  5. Nov 10, 2019 at 9:10 AM
    #5
    MJoeP

    MJoeP New Member

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  6. Nov 10, 2019 at 10:11 AM
    #6
    Stocky Balboa

    Stocky Balboa New Member

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    Minor stuff- Tint, rear sway bar , pedal commander, TRD drop in filter Soon... DD Exhaust, gun safe, bed extender, BAKflip, larger tires and method rims.
    congrats on the new ride.
    Fairly new owner here too. My stock exhaust did have an odd drone type sound. All went away with DD 8” exhaust w/ resonator.
     
    AzureNightmare likes this.
  7. Nov 10, 2019 at 10:16 AM
    #7
    CreekDweller

    CreekDweller [OP] New Member

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    Good replies. I have the single exhaust and not the TRD dual pipe system, so an H pipe connector is not possible. I think I'll take Ed's suggestion and wait a bit for the engine to finish break-in and see if the drone goes away. Thanks for the input.
     
  8. Nov 10, 2019 at 10:43 AM
    #8
    AzureNightmare

    AzureNightmare F.N.G. (F*cks Not Given)

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    Is it possible to do the H pipe in the mid section? Even the single exits start out as two separate pipes that merge in the muffler. I have no idea, I'm not a mechanic by any stretch.
     
  9. Nov 10, 2019 at 11:03 AM
    #9
    CMB

    CMB New Member

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    Not nearly enough room here!
    Give Keith a call at 1-760-877-4234, he'll educate you on everything about your Tundra exhaust.
     
    dirtydeeds and AzureNightmare like this.
  10. Nov 10, 2019 at 11:06 AM
    #10
    AzureNightmare

    AzureNightmare F.N.G. (F*cks Not Given)

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    I already bought a 10" BAMuffler from him, so I'm good. :thumbsup:
     
    dirtydeeds likes this.
  11. Nov 10, 2019 at 3:00 PM
    #11
    CreekDweller

    CreekDweller [OP] New Member

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    Will do this.

    One thing that is odd is that some stock systems drone and some don't. Maybe it will all settle down after break-in.
     
  12. Nov 10, 2019 at 8:13 PM
    #12
    17TundraDCEd

    17TundraDCEd New Member

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    Just curious. Is there are certain speed range, or rpm, or driving condition that you notice it? In my experience, 50 to 65 mph in high gear and light throttle to maintain or fluctuate speed (especially on an incline) was the sweet spot for drone. The engine rpm is low, and the truck kind of lugs.
     
  13. Nov 11, 2019 at 6:17 AM
    #13
    dirtydeeds

    dirtydeeds New Member Vendor

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    There’s no break in. The exhaust is welded together.
     
  14. Nov 11, 2019 at 6:19 AM
    #14
    dirtydeeds

    dirtydeeds New Member Vendor

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    They all do this. The tune in the ecu determines its severity. It’s caused by how much valve overlap there is, and when it occurs.

    a helmholtz resonator will make it stop.

    760-877-4234

    Gimme a call in a few hours today.
     
    FrenchToasty and AzureNightmare like this.
  15. Nov 11, 2019 at 8:20 AM
    #15
    CMB

    CMB New Member

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    Not nearly enough room here!
    Reach down and shift to a lower gear to keep from lugging, you bought the Sequential Shifter; you have more choices than "D":thumbsup:
     
    Rex Kramer and dirtydeeds like this.
  16. Nov 11, 2019 at 8:43 AM
    #16
    17TundraDCEd

    17TundraDCEd New Member

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    Right foot works too.;)
     
  17. Nov 11, 2019 at 12:16 PM
    #17
    CMB

    CMB New Member

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    Not nearly enough room here!
    Yep, if you'd rather shift with the throttle instead of gears.
     

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