Exhaust sound after engine's off - DPF/DOC delete - Ford Powerstroke Diesel Forum
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post #1 of 8 Old 10-05-2008, 05:03 PM Thread Starter
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Exhaust sound after engine's off - DPF/DOC delete

So I've had the 210hp Spartan tune running for a while, using a straight DPF/DOC replacement pipe and the stock muffler. I get the whooshing sound everyone talks about, but sometimes after I shut my truck off I continue to get a sound that almost sounds like the turbos are taking forever to spool down. Is that really what that sound might be? Sometimes it lasts a good 5-10 seconds.

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post #2 of 8 Old 10-05-2008, 05:06 PM
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post #3 of 8 Old 10-05-2008, 06:05 PM
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Actually you are running a full straight pipe system. The factory "muffler" is fake. You can install a real muffler and you will notice the exhaust sounds much deeper and the whistle and air noise from the turbos is greatly reduced.
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post #4 of 8 Old 10-05-2008, 06:11 PM
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HEY GUYS. I HAVE AN 02' I CUT THE END OF THE DOWN PIPE OFF UNDER THE CAB AND PUT 4" FROM THERE BACK. IS THERE A WAY TO ELIMINATE THE TAILPIPE NOISE WITHOUT EFFECTING THE FLOW?
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post #5 of 8 Old 10-05-2008, 06:22 PM
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Quote:
Originally Posted by 19558077 View Post
HEY GUYS. I HAVE AN 02' I CUT THE END OF THE DOWN PIPE OFF UNDER THE CAB AND PUT 4" FROM THERE BACK. IS THERE A WAY TO ELIMINATE THE TAILPIPE NOISE WITHOUT EFFECTING THE FLOW?
not really... you can put a high flow muff on it.. but you will still get the noise...
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post #6 of 8 Old 10-05-2008, 07:48 PM
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Yep that's completely normal. You should hear it spooling down with stacks, loud and can take up to 15 seconds to stop. I get people all the time asking me what that noise is when I stop to get diesel.

2008 F-350 6.4 CC DRW 4x4 Cowboy Edition 6-speed w/3.73 gears
SCT tuned w/5" DPF/DOC delete going into black 6" Aussie Stacks
Keystone Ram air hood feeding a S&B Cold Air Intake
Ranch Hand front bumper, custom headache rack and bed rails, lots of L.E.D.'s, 15 million candlepower H.I.D. GoLight
Black 22.5" Alcoa Big Rig wheels with 36" tires
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post #7 of 8 Old 10-05-2008, 07:51 PM
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Anyone running the quad tip Monster from Banks?
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post #8 of 8 Old 10-05-2008, 07:52 PM
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dual quad tips I forgot to say
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