Flowmaster droan

Mopar Exhaust Systems

  1. moparmarks

    moparmarks FBBO Gold Member FBBO Gold Member

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    Will running an H or X pipe eliminate that annoying droan that can come with Flowmaster 40's? I hear tell that it will.
     
  2. 68 HEMI GTS

    68 HEMI GTS Well-Known Member

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    I run an xpipe on my rr. It’s not bad at all in the car when the tail pipes are on. It’s still pretty loud in the car without them. Delta flows.

    I should state that it does not have the dreaded drone.
     
    Last edited: Dec 12, 2019
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    • Kern Dog

      Kern Dog FBBO Gold Member FBBO Gold Member

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      Well, I call it a drone....
      The X is usually quieter can make a little more power. The reverberating drone you hear is characteristic of a chambered muffler that doesn't dampen sound as much as it actually "breaks it". The sound pulses are forced to collide against each other to cancel each other out to some degree.
       
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      • Lionized

        Lionized Well-Known Member

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        You could also consider adding a pair of glasspacks as resonators, HEMI style. I did and it eliminated the drone. Cost: approx. $100.
         
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        • themechanic

          themechanic Oklahoma is OK FBBO Gold Member

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          I think they have a policy for a limited time if you do not like the sound you can change to a different series. I have 50 series on the SBC El Camino with H-pipe and no drone. I have Dynomax Super Turbos on the Coronet.
           
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          • khryslerkid

            khryslerkid FBBO Gold Member FBBO Gold Member

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            I've never heard it put that way professor, but it sounds good :)

            I have an X pipe with el-cheapo Jegs chambered mufflers, 2-1/2" and there's a "drone" between 2,000 and 2,300 rpms. Under or above that range it's fairly quite. I'll live with it until these mufflers rust or blow out.
             
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            • Darter6

              Darter6 FBBO Gold Member FBBO Gold Member

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              ^^^ Rust ? what's rust ? :poke:
               
            • ricks_RR

              ricks_RR Well-Known Member

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              i put 2 1/2 pipe with flowmaster 40's on my 383 ( duel ) no xpipe and yes there is a drone between 20 and 40 miles an hour but at 50/60 /70 its very comfortable in the car . you can talk but when you stomp it to the floor man you know you are driving a MOPAR BIG BLOCK .and driving into a car show it turns everybody's heads with alot of compliments on how nice it sounds . very happy with it
               
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              • 69 GTX

                69 GTX FBBO Gold Member FBBO Gold Member

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                I can't confirm this but I think I remember reading the X is better than the H pipe. I wonder if wrapping the mufflers with header tape would help? I think it's almost more of a harmonics thing. Good luck.
                 
              • 33 IMP

                33 IMP FBBO Gold Member FBBO Gold Member

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                No one has asked the op if he has tailpipes or dumps.
                Does he have 40s or super 40s? It makes a difference .
                I doubt an x or h will help a bunch without a tailpipe.
                My opinion ? Add an h pipe, much easier (and cheaper) than an x. An x would require completely re-doing the head pipes. If no tailpipe, add one. If those still don't fix the drone, add purpose built resonators or glasspacks into the tailpipes.
                I have little personal experience with 40s, they are too loud for my taste, but I do have a set of 3 1/2 in/out "big block" 50s with 3 1/2 pipe to the rear bumper on my 62
                (built for the stroker and nitrous of the next motor). No restriction , no drone.
                 
              • Ranger16

                Ranger16 Well-Known Member

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                I have the same set up as ricks_RR (post#8) and have to agree with him. Mine drones at about 1800 RPM (45 MPH), just like Flowmaster says it will. When I first got the car I thought it was too loud, but I'm now used to it and kind of actually like it, but then again, it's a muscle car, not a daily driver either.
                 
              • 1967coronet

                1967coronet FBBO Gold Member FBBO Gold Member

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                I like my 40s also. old set, headers and full 2 1/2" to the bumper no x or H pipe.
                I wear hearing aids , so having the extra volume is nice :lol:.
                 
              • Kern Dog

                Kern Dog FBBO Gold Member FBBO Gold Member

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                I had Flowmasters for years, then switched to the Welded Ultra Flo mufflers. I sometimes miss the cackle and bite that the Flowmasters had.
                 
              • moparmarks

                moparmarks FBBO Gold Member FBBO Gold Member

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                Well okie dokie Professor Hot Dog. Thanks for the scientific explanation. :D I too like the sound of the Flowmasters but hate that drone.
                I have a 50 on my 5.2 Dakota and really like the tone and it doesn't drone but it is a single inlet and dual outlet.
                I have a new pair of 40's, the regular ones I think, just sitting here. Getting ready to have the exhaust put on my car and will have tail pipes and probably an X pipe if not an H pipe.
                Trying to decide if too use the Flowmasters or buy something else.
                P.S If you think my spelling sucks you should watch me trying to type. :lol:
                 
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                • Kern Dog

                  Kern Dog FBBO Gold Member FBBO Gold Member

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                  Do you use just your index fingers and thumbs like I do?
                   
                • moparmarks

                  moparmarks FBBO Gold Member FBBO Gold Member

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                  Just my index fingers. Have not advanced to thumbs yet and beings that I'm pushin' 60 I probably never will.
                   
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                  • mopar 3 B

                    mopar 3 B Well-Known Member

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                    Just what's wrong with drone?
                     
                  • moparmarks

                    moparmarks FBBO Gold Member FBBO Gold Member

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                    I have problems with my ears. Not so mush the loudness but more the tone just kills my right ear.
                     
                  • Kern Dog

                    Kern Dog FBBO Gold Member FBBO Gold Member

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                    I understand that. I have hearing loss yet am sensitive to certain noises. Strange.
                     
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                    • Brewzer67

                      Brewzer67 Well-Known Member

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                      I tried resonators with mine but couldn't get the drone to a manageable level so I switched to Borlas and am quite happy with them.
                      Here is a short clip of how they sound:
                      https://photos.app.goo.gl/utw1dtzXgUSwW8mf6
                       
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