Turbo back exhaust question for those of you with the DPF delete - Ford Powerstroke Diesel Forum
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Old 06-17-2012, 08:39 PM
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Turbo back exhaust question for those of you with the DPF delete

I'm going with a mini maxx, dpf delete and turbo back exuast on my 2012 350
i'm debating on 4 or 5 inch and straight pipe or with muffler
anyone with this done on their 11/12 350 have any suggestions?

I want the truck to have a nice sound when taking off but i don't want it to be crazy annoying when i'm just crusin at highway speeds going long distances
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Old 06-17-2012, 09:35 PM
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Quote:
Originally Posted by Hawco View Post
I'm going with a mini maxx, dpf delete and turbo back exuast on my 2012 350
i'm debating on 4 or 5 inch and straight pipe or with muffler
anyone with this done on their 11/12 350 have any suggestions?

I want the truck to have a nice sound when taking off but i don't want it to be crazy annoying when i'm just crusin at highway speeds going long distances
If i recall, the 6.7's dont get the drone sound at highway speed even without a muffler.

I have a 4" strait pipe with stock tail pipe. Exhaust noise is close to stock cruising around town and highway, untill you step on it, then it roars like a beast. Although if i was gonna do it all over again i would go 5" with no muffler.

Sent from my DROID2 GLOBAL
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Old 06-18-2012, 08:34 AM
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Quote:
Originally Posted by Bryce18 View Post
If i recall, the 6.7's dont get the drone sound at highway speed even without a muffler.

I have a 4" strait pipe with stock tail pipe. Exhaust noise is close to stock cruising around town and highway, untill you step on it, then it roars like a beast. Although if i was gonna do it all over again i would go 5" with no muffler.

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I was told with 5 inch that you lose some back pressure
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Old 06-18-2012, 08:44 AM
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5" should keep ur egt's lower
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Old 06-18-2012, 08:56 AM
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Im not sure if we have to worry about loss of back pressure either, but someone correct me if I am wrong.


And yes 5" should lower egts as well.

With 4" strait pipe my mini max refuels at 1400 degrees at 65-70 mph WOT from a stop...

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Old 06-18-2012, 10:26 AM
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I went with 5" with a muffler. I get a lot of positive comments on the sound. I pasted my wife the other day while she was sitting at a red light and the first thing she said to me was how awesome the truck sounded.
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Old 06-18-2012, 10:37 AM
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5" straight pipe. No drone on hwy. Sounds almost stock cruising around town other than the turbo whistle. WOT is like the gates of hell opening. EGTs will be lower as well.

It'll be a DP back exhaust as well. Not sure that anyone is making a turbo back.
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Old 06-18-2012, 10:46 AM
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lol at the gates of hell opening....

I like that! Got a video hopefully?
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Old 06-18-2012, 11:00 AM
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Anyone documented the lower egts between 4" and 5"? On the dodges it's been proven over and over that there is no difference in power or egts between 4" and 5" up to 900hp.
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Old 06-18-2012, 11:39 AM
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Can't say it's proven but my truck doesn't defuel at 65-70 mph on a WOT run like like guy posted eariler. Same truck other than 4" vs 5" exhaust.

WOT run to 70ish getting on the interestate my truck gets to 1100 ish and his is defueling at 1400 doing the same thing.
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