Sedan Stillen 2003 droning at lower RPMs
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Sedan Stillen 2003 droning at lower RPMs
Well, I have just installed my Stillen gen 2 exhaust and realized that I can only stand the deep sound for about 10 or so minutes before it starts to annoy me. Its deep growl at 2000 - 2700 RPM is always there except when I'm on a highway. I did not expect that and should have found couple of threads talking about it (dated 2008) earlier. So that only question that I have now is this:
How can I minimize in cabin noise at this point?
P.S. Turn on the radio wouldn't really work for me as I drive my family around all the time...
How can I minimize in cabin noise at this point?
P.S. Turn on the radio wouldn't really work for me as I drive my family around all the time...
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There's not a whole lot you can do. You can add some additional resonators in the pipes and maybe resonated exhaust tips (yes, they do help), but you're still going to have a good bit of drone and the additional noise suppresion maybe knock down any gains you get from the exhaust. It's the nature of the beast, especially if you have an automatic. I had the Borla TD a few years back and like you, I couldn't stand the drone either. It was out of character for the car. Apparently adding a resonated X-pipe from MagnaFlow helps per Jeff92Se on this site. I believe your Stillen already has an X-pipe (maybe it's not resonated though?) Maybe consider contacting Jeff or maybe he'll chime in later.
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A good read.
https://g35driver.com/forums/g35-sed...ll-review.html
Well at least you tried to pick the quieter of the two. The gen2 is supposed to be the quieter of the two Stillen exhausts. I don't know the specific differences but I don't think the gen2 has a resonated X. My thoughts on how the magnaflow X reduced my drone is in that thread. I don't know about replacing the X with a resonated version. ie.. the gains vs cost would be suspect to me. Before doing my mod, I really suspected most of the drone was from the rear muffler and I still do. In my case, the resonated X helped to the point where I wouldn't replace the rear muffler anymore.
But in YOUR case where you already have the performance X pipe installed, I'd "consider" replacing the rear muffler with a magnaflow 2 in 2 out offering. In either a resonated X or non-X muffler. Klubbheads had a custom dual that would end up being almost exactly like yours if you added a magnaflow resonated X muffer in the rear and he reported no droning at all.
https://g35driver.com/forums/g35-sed...ll-review.html
Well at least you tried to pick the quieter of the two. The gen2 is supposed to be the quieter of the two Stillen exhausts. I don't know the specific differences but I don't think the gen2 has a resonated X. My thoughts on how the magnaflow X reduced my drone is in that thread. I don't know about replacing the X with a resonated version. ie.. the gains vs cost would be suspect to me. Before doing my mod, I really suspected most of the drone was from the rear muffler and I still do. In my case, the resonated X helped to the point where I wouldn't replace the rear muffler anymore.
But in YOUR case where you already have the performance X pipe installed, I'd "consider" replacing the rear muffler with a magnaflow 2 in 2 out offering. In either a resonated X or non-X muffler. Klubbheads had a custom dual that would end up being almost exactly like yours if you added a magnaflow resonated X muffer in the rear and he reported no droning at all.
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A good read.
https://g35driver.com/forums/g35-sed...ll-review.html
Well at least you tried to pick the quieter of the two. The gen2 is supposed to be the quieter of the two Stillen exhausts. I don't know the specific differences but I don't think the gen2 has a resonated X. My thoughts on how the magnaflow X reduced my drone is in that thread. I don't know about replacing the X with a resonated version. ie.. the gains vs cost would be suspect to me. Before doing my mod, I really suspected most of the drone was from the rear muffler and I still do. In my case, the resonated X helped to the point where I wouldn't replace the rear muffler anymore.
But in YOUR case where you already have the performance X pipe installed, I'd "consider" replacing the rear muffler with a magnaflow 2 in 2 out offering. In either a resonated X or non-X muffler. Klubbheads had a custom dual that would end up being almost exactly like yours if you added a magnaflow resonated X muffer in the rear and he reported no droning at all.
https://g35driver.com/forums/g35-sed...ll-review.html
Well at least you tried to pick the quieter of the two. The gen2 is supposed to be the quieter of the two Stillen exhausts. I don't know the specific differences but I don't think the gen2 has a resonated X. My thoughts on how the magnaflow X reduced my drone is in that thread. I don't know about replacing the X with a resonated version. ie.. the gains vs cost would be suspect to me. Before doing my mod, I really suspected most of the drone was from the rear muffler and I still do. In my case, the resonated X helped to the point where I wouldn't replace the rear muffler anymore.
But in YOUR case where you already have the performance X pipe installed, I'd "consider" replacing the rear muffler with a magnaflow 2 in 2 out offering. In either a resonated X or non-X muffler. Klubbheads had a custom dual that would end up being almost exactly like yours if you added a magnaflow resonated X muffer in the rear and he reported no droning at all.
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#8
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Wrapping the muffler in an attempt to change the resonance characteristics of the unit is an interesting idea. For the amount of time/cost it would take, it could be worth a try. But I'd give the chance of success at about 20%.
Remember, it's just my "guess" that most of the drone is from the muffler. I based this on methods that you have access to. ie.. driving around with the window down and noting if the drone sound is coming from under the car or behind it.
Remember, it's just my "guess" that most of the drone is from the muffler. I based this on methods that you have access to. ie.. driving around with the window down and noting if the drone sound is coming from under the car or behind it.
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