Noise level with DPF delete or DPF + CAT
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Freshman User
Joined: Nov 2008
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Noise level with DPF delete or DPF + CAT
Hey guys
I'm driving a 2009 F250 as a company truck. I also get to use it for personal use and just got permission to do a DPF delete. Already have my spartan tuner so I'm ready to go.
My main concern is noise, I leave at all times of the night.. and there will be some warmup idle in winter.
How much louder is it with both DPF and Cat removed? I'm thinking maybe I should leave the cat to keep it quiet. If there isn't much difference I'll just delete both. Thanks!
I'm driving a 2009 F250 as a company truck. I also get to use it for personal use and just got permission to do a DPF delete. Already have my spartan tuner so I'm ready to go.
My main concern is noise, I leave at all times of the night.. and there will be some warmup idle in winter.
How much louder is it with both DPF and Cat removed? I'm thinking maybe I should leave the cat to keep it quiet. If there isn't much difference I'll just delete both. Thanks!
Elder User
Joined: Dec 2009
Posts: 882
Likes: 0
From: Ohio
Hey guys
I'm driving a 2009 F250 as a company truck. I also get to use it for personal use and just got permission to do a DPF delete. Already have my spartan tuner so I'm ready to go.
My main concern is noise, I leave at all times of the night.. and there will be some warmup idle in winter.
How much louder is it with both DPF and Cat removed? I'm thinking maybe I should leave the cat to keep it quiet. If there isn't much difference I'll just delete both. Thanks!
I'm driving a 2009 F250 as a company truck. I also get to use it for personal use and just got permission to do a DPF delete. Already have my spartan tuner so I'm ready to go.
My main concern is noise, I leave at all times of the night.. and there will be some warmup idle in winter.
How much louder is it with both DPF and Cat removed? I'm thinking maybe I should leave the cat to keep it quiet. If there isn't much difference I'll just delete both. Thanks!
Good question. Are you doing just the delete or are you replacing the whole exhaust? I went with complete replacement and the exhaust note to me is...weird. Sitting in the drivers seat I hear a nice throaty rumble. People outside say it sounds like a loud *** jet taking off whenI'm on the pedal. I'm not sure how I'm getting two different exhaust sounds but it does. If I start it up and go stand by the tail pipe it sounds like a jet throttling up, and back down, over and over again. All I can think is the turbo is spooling up and down while it's sitting there but I have no idea if thats true or not.
In any case my system was a straight pipe down pipe back replacement and while idle is not bad it is fairly noisy when on the throttle.
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Freshman User
Joined: Nov 2008
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Since it's a company truck I'm only deleting the DPF and Cat (if not too loud). The rest will be stock exhaust.
I'm not concerned about noise while on the pedal, just idle and high idle (no load) noise, while sitting infront of house.
I do love the turbo noises, and throaty sounds.. but I gotta keep the daily driver "decent".
I'm not concerned about noise while on the pedal, just idle and high idle (no load) noise, while sitting infront of house.
I do love the turbo noises, and throaty sounds.. but I gotta keep the daily driver "decent".
Postmaster
Joined: Jul 2011
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personally i would love to have the jet engine sound along with the throaty sound. i love turbo whistle but i just can't get what you guys with the new technology can get since i have a '94 7.3 IDI Factory turbo.
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From: Pflugerville, tx
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More Turbo
Joined: Sep 2007
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From: Centerbrook, Ct.
At idle, mine is still quieter than a stock 6.0L. Don't delete just the DPF. Delete the whole DOC/DPF together. The DOC will probably clog sooner or later since it will never get hot enough to work as designed without the regen cycle.
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Postmaster
Joined: Jul 2011
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. Some people will hear it at 3am and some will not. i have come home from my friends house at 3 am before and ii have a 600 ft gravel driveway, my parents room is on the front of the house, same side as the driveway, they will have both windows open and my dad will not even know that i came home. i was at one of my friends that was just down the street and i came home and my cold idle was not even kicked down yet, so i am coming up the drivway taching like 1600rpm.Gotta love the sound of the old 7.3L especially idle and low rpms
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Senior User
Joined: Nov 2007
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[quote=tgreening;10776898]Good question. Are you doing just the delete or are you replacing the whole exhaust? I went with complete replacement and the exhaust note to me is...weird. Sitting in the drivers seat I hear a nice throaty rumble. People outside say it sounds like a loud *** jet taking off whenI'm on the pedal. I'm not sure how I'm getting two different exhaust sounds but it does. If I start it up and go stand by the tail pipe it sounds like a jet throttling up, and back down, over and over again. All I can think is the turbo is spooling up and down while it's sitting there but I have no idea if thats true or not.
What you are hearing is the EGR valve opening and closing. Some tunes have this feature so it will not stick shut.
What you are hearing is the EGR valve opening and closing. Some tunes have this feature so it will not stick shut.
Fleet Mechanic
Joined: Oct 2011
Posts: 1,778
Likes: 287
From: Down SOUTH
I just deleted my DPFE & Cat with the AFE test pipe.
Superchips programmer to turn the regen & egr off.
I'm still running the stock muffler & tailpipe.
As noted I love the in cab noise I hear but I
HATE the spewing air noise you hear standing
Back at the exh pipe.
Superchips programmer to turn the regen & egr off.
I'm still running the stock muffler & tailpipe.
As noted I love the in cab noise I hear but I
HATE the spewing air noise you hear standing
Back at the exh pipe.
Elder User
Joined: Jan 2010
Posts: 522
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From: oswego, new york
I have just the dpf delete and sound difference in the cab is almost none. It barely has a nice v-8 sound from the tail pipe when it's leaving the driveway. And yes you hear the air rushing through it at idle, i personally love it and there is no getting around it if you modify your exhaust.
Senior User
Joined: Nov 2011
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I have just the dpf delete and sound difference in the cab is almost none. It barely has a nice v-8 sound from the tail pipe when it's leaving the driveway. And yes you hear the air rushing through it at idle, i personally love it and there is no getting around it if you modify your exhaust.
Posting Guru
Joined: Sep 2010
Posts: 2,213
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From: The Woodlands, TX
Regular Idle.
<a href="http://s68.photobucket.com/albums/i34/westwoodlands/?action=view¤t=129823AD-A0A7-43A8-ADBC-E2D21340BA90-7615-00000752B7E3F63F.mp4" target="_blank"><img src="http://i68.photobucket.com/albums/i34/westwoodlands/129823AD-A0A7-43A8-ADBC-E2D21340BA90-7615-00000752B7E3F63F.mp4" border="0" alt="Photobucket Pictures, Images and Photos" /></a>
High Idle
<a href="http://s68.photobucket.com/albums/i34/westwoodlands/?action=view¤t=466AD387-B776-44EF-B6D5-3A55D40C5EF1-7615-00000752908EEAB1.mp4" target="_blank"><img src="http://i68.photobucket.com/albums/i34/westwoodlands/466AD387-B776-44EF-B6D5-3A55D40C5EF1-7615-00000752908EEAB1.mp4" border="0" alt="Photobucket Pictures, Images and Photos" /></a>
The sound difference is clearly localized to the area around the Exhaust. Im running 4" turbo back. When I just had the delete pipes, I'd guesstimate the notice was about 85% of what it is now. The truck was also not as throaty and had more air movement sounds.
<a href="http://s68.photobucket.com/albums/i34/westwoodlands/?action=view¤t=129823AD-A0A7-43A8-ADBC-E2D21340BA90-7615-00000752B7E3F63F.mp4" target="_blank"><img src="http://i68.photobucket.com/albums/i34/westwoodlands/129823AD-A0A7-43A8-ADBC-E2D21340BA90-7615-00000752B7E3F63F.mp4" border="0" alt="Photobucket Pictures, Images and Photos" /></a>
High Idle
<a href="http://s68.photobucket.com/albums/i34/westwoodlands/?action=view¤t=466AD387-B776-44EF-B6D5-3A55D40C5EF1-7615-00000752908EEAB1.mp4" target="_blank"><img src="http://i68.photobucket.com/albums/i34/westwoodlands/466AD387-B776-44EF-B6D5-3A55D40C5EF1-7615-00000752908EEAB1.mp4" border="0" alt="Photobucket Pictures, Images and Photos" /></a>
The sound difference is clearly localized to the area around the Exhaust. Im running 4" turbo back. When I just had the delete pipes, I'd guesstimate the notice was about 85% of what it is now. The truck was also not as throaty and had more air movement sounds.