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Exhaust louder than expected

  #1  
Old 09-10-2018, 09:38 AM
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Exhaust louder than expected

Recently had a 2.25" Dynomax Ultra Flo-X, DI/DO, installed onto my 2012 5.0. I went with it, as that is what my '05 4.6 was equipped with, and I loved it. I went with a different, but still highly regarded, local, installer, over the guy that usually does my exhaust. I got my truck back Friday, and it is quite a bit louder than my old truck was, after it had broken in a bit. I like the sound, but concerned with a particular neighbor that is already a pain in the neck. Engine being bigger, and quite a bit more power, really make that big of a difference, or is it maybe how the different installer does his work? I am thinking I might have to quiet it down a bit, using some long glass packs, as resonators. I remember doing that before, when I had my dronemaster 40, on the '05.
 
  #2  
Old 09-10-2018, 12:20 PM
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Just guessing, but my guess is that the much higher hp 5.0 has more free flowing cats as well as the rest of the exhaust and it requires more muffling to quieten than the 4.6.
 
  #3  
Old 09-11-2018, 09:10 AM
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I was wondering that as well. Also, as a side note, wonder if maybe being a supercrew, the x-pipe built into my muffler may simply be too far back to be effective, and I might have to add either an H-pipe or X-pipe up closer to the manifolds. The truck seems kinda sluggish in the morning.
 

Last edited by dewalt17; 09-11-2018 at 10:45 AM.
  #4  
Old 09-11-2018, 02:03 PM
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That's what can happen when you replace the stock exhaust - I think I recommended that you keep the stock exhaust and simply delete the resonator - I stick by that recommendation.

Another possibility - a complete stock V8 Raptor takeoff system.
 
  #5  
Old 09-11-2018, 03:50 PM
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My new exhaust is already installed. I copied what I did to my '05. I do wonder if the extra length of the cab is contributing to some of my concerns, both in performance and noise. I don't recall discussing this truck before. I don't like SI/SO exhaust regardless.
 

Last edited by dewalt17; 09-11-2018 at 04:29 PM.
  #6  
Old 09-11-2018, 07:51 PM
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Adding a glasspak as a resonator might do it, I ended up adding weights to kill in cab noise. See post 4, 5, 6 in this thread https://www.f150online.com/forums/exhaust-intake-systems/510118-my-new-ss-cat-back-install-07-f-side.html

Might be worth looking at?
 
  #7  
Old 09-11-2018, 08:43 PM
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I still don't understand by "adding weights"... I read the post, and can't figure it out....
 
  #8  
Old 09-12-2018, 12:09 PM
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Where would I find said weights? I did some quick searching, and nothing. Maybe find some on a junkyard truck? Needing to make a trip anyway, soon, for my nephews 01's explorer sport. Sister bought it for him, cheap, and needs some new light fixtures. Kinda a project until he is old enough to drive in a couple years. I haven't done any interstate travel yet, to get an idea of sound, only 2 lane @60mph. I am thinking some thrush glass packs will do the trick. My sister works at auto zone, so I can get a discount there. Saw some cheap on Amazon warehouse too.


Edit* I think these may work, for my needs. I cannot spend much. We are having a privacy fence installed to avoid issues with neighbor, over our German Sheppard that hates her.

Amazon Amazon
 

Last edited by dewalt17; 09-12-2018 at 12:45 PM.
  #9  
Old 09-13-2018, 10:18 AM
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I have one of these weights... it is literally a solid bar about an inch and a half thick and like six inches long, welded on flat stock, to the pipe.


https://www.f150forum.com/f6/what-pi...r-clamp-51986/
 
  #10  
Old 09-13-2018, 10:34 AM
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Oh, it really is a "weight"... neat idea!

Never would've thought to do that.

Reminds me of tuning a piano or a stringed instrument.

Learned something new today!
 
  #11  
Old 09-13-2018, 02:29 PM
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I will see what I can find, when I get out to U-pic-a-part. I am bound to find them there, I would think. I wonder if it would help with the high rpm rap that I get, when I get a heavy foot?
 
  #12  
Old 09-13-2018, 11:18 PM
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Originally Posted by ManualF150 View Post
I still don't understand by "adding weights"... I read the post, and can't figure it out....
Well, I doubt the weights change actual sound outside the cab, but there was a reason Ford put those weights on the pipes of my Mercury and there was a good size weight on my truck's oem exhaust pipe from Y back . the weights dampen vibrations like damping a tuning fork, and they work.

As to where to get them, I made a clamp on set that weighs maybe 10 pounds and put ahead of all mufflers, sure made it nice in cab, very muted. You can find 10 pounds of steel to make from, just clamp to pipe. Something FORD did I think on that Merg was use like shot pieces 2" pipe welded to brackets, capped on one end, filled with sand or concrete, and capped again.

 
  #13  
Old 09-16-2018, 12:24 PM
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Still wondering if whether I should have an actual X-pipe installed up closer towards the front of the truck. I am not entirely sure that being so far back, the one in my muffler is very effective, scavenging wise, as it was in my old supercab.
 


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