The DPF (Diesel Particulate Filter) and Catalytic Convertor get up to 1100 degrees during regeneration. If it was the first one, I suspect some coating or oil on the exhaust burned off.

I bet the smell is much less next time.

 

Now that is good I.e., funny. .

 

That's a mess.
SEIC won't allow active regen to continue but it does help remove soot if the active regen had been running for some time.
Your temps were already hot.

 

Your truck is going to end up on youtube where some kid taped himself talking crap about "that [few choice words] Ford" because they saw smoke.

 

Hey Epic,
New exhaust parts? Inquiring minds want to know, what did you get?

 

Dynomax 5" Exhaust Installation Ford 6.7L Diesel - YouTube

 

Nice exhaust system, love it. What affect if any will that have on your regen? It was my understanding that the ford tip(s) with those slots that fold into the pipe were functional in some way to the regen process.

 

Those holes allow cool air to enter the exhaust stream post DPF to cool down the high temps during active regen.
The dynomax has a cooling exhaust tip but the holes appear a bit more inconspicuous.

I see 1,100 - 1,200 degrees on the EGT sensor post-DPF.
Even with cool air entering the exhaust stream, it's still hot at the exhaust tips after cooling.
Without the holes, you might melt a Prius at a traffic light.

https://www.ford-trucks.com/forums/1...l#post11230267

 

Sorry to the OP for the hijack, I'll be quick. I was kind of worried about increased regens due to less back pressure but that is not happening. I have no imperical data yet but I swear so far I had FEWER regens and my mileage has increased. Understand that this makes no sense to me and it's too early to say for sure. My fuel log shows better mileage on winter fuel than summer fuel. Last winter I had a 1 - 2 mpg hit. I need a few more fuel tanks to see a clear and sustained bump in mileage before I can say for sure. I do love the looks, sound and getting rid of the WOT PSSHSHSHSHSHSHHSHSHSHSHS.

 

in all fairness, the OP should be good to go, so we aren't hijacking, just shooting the bull.

Epic, I have the AFE stage 7 intake. I think you would like it...........

 

Fair enough then. Speaking of bull, I'd put any comments of increased mileage due to dpf back changes squarely in that category. There must be an explanation for what I'm seeing and another contributor somewhere. Must be the aliens... Time will tell.

How are you liking your intake? Sound? Appearance? Geek factor? I get motivations for those changes but does your fuel log show any changes?

 

Sound? Nicer, throaty growl, a slight increase in turbo whistle that can only be heard outside the cab.

Appearance? Looks great, nice product, fit and finish are as good as can be. With the exterior "sock" on it I think it functions very well too.

Fuel usage? Well, maybe .5 MPG increase over time and under certain conditions. They say that higher quantities of air will trip the mass air flow sensor into throwing a code and I have not thrown any codes, so I wonder if it really does that much other than changing the sound. The black plastic tube from the intake to the turbo out to the filter is an AFE design which is where the change in sound probably occurs. Removes the factory air box too so there is no baffling/muffle/insulation/dead space, all that NVH engineering is removed.

It also has been stated on FTE that larger amounts of cold air in the winter time cause lower MPG/efficiency loss, so this may not help in that category at all. Obviously I live in the South and spend most of my time in areas that do not see below 30º temps during the daylight hours, only at night. It was 19º at my house this morning but it's already 35º before 9:00am. One thing that may be good, the pre-filter might be a good thing in that it would make it easier to clean out snow pack that gets sucked in there.

Aside from the sound, I am not sure that you could tell if it is different than stock in a blind test. Maybe, but it's got to be such a minimal difference that only few would be able to tell.

 

Hmmm - you must have a VERY LIGHT foot....

 

I get that rubber smell and see smoke wafting out from under the truck. Now I do have my truck oil sprayed and the 1st regen after it was sprayed it looked like it I had a grass fire going on under there.

But I still am trying to figure out why the rubber smell and smoke still its been a few month since I've had it undercoated. Stock exhaust still MBRP kit goes on in spring.

Anyone got any ideas?

 

There have been a few folks that had to tighten a nut somewhere on the exhaust system, so if the smell continues you may want to check that out.

Also, I turned my truck on once, had no turbo boost at all, but when I "rebooted" the truck's computer (shut the engine off then restarted), it was back. That has been the only time I've had that happen so far.