Turn Down Exhaust...

[Winnebago_Bob]

Just traded a 2004 Dodge 4X4 2500 SLT Sport HO Quad Cab for the truck in the sig.

Old truck blew exhaust all over the lower right rear corner panel and rear bumper - stained it, as well as stained the leading edge of the TT over time.

Anyone add a turn down exhaust and if so -

which?
Did you cut tailpipe to install?
Unintended consequences?

Thanks!

[wilber1]

The DPF trucks don't blow soot, that's the whole point of the DPF. My 2011 still doesn't have any soot in the tailpipe.

[JIMNLIN]

Just be aware a turn down exhaust on the Cummins on a dry dusty campground road may pizz off some of your neighbors. You will be idling along in low gear with a huge dust cloud on your right side. Saw this in a dry dusty Colorado camp ground.

My '03 Dodge/Cummins started to soot up the lower RH quarter panel when new. I added a chrome extension. No soot issues now.

[rhagfo]

ib516 wrote:

Sport45 wrote:
The 2015 shouldn't be pumping out enough soot to stain anything. I'd leave it alone.

X2

X3 I have an 01, and do,t smoke enough to soot the TV or 5er.

New truck will not soot unless you remove all the smog stuff and chip like crazy.

[eHoefler]

I have done on 3 6.7 equipped rams, no ill effect at all.

[ib516]

Sport45 wrote:
The 2015 shouldn't be pumping out enough soot to stain anything. I'd leave it alone.

X2

[jmtandem]

Just traded a 2004 Dodge 4X4 2500 SLT Sport HO Quad Cab for the truck in the sig.

Old truck blew exhaust all over the lower right rear corner panel and rear bumper - stained it, as well as stained the leading edge of the TT over time.

Anyone add a turn down exhaust and if so -

which?
Did you cut tailpipe to install?
Unintended consequences?

Thanks!

Been there done that. No unintended consequences. Got the turndown from Geno's garage. Works perfectly.

[jus2shy]

I see you have a RAM. Unlike GM and Ford, RAM doesn't have any venturi effect on its exhaust pipe. Many just lop off the last 6 or 8 inches on the pipe and install the tip of their choice. Nothing to hurt and no soot ouput with the modern emissions on trucks. I've been thinking of doing something similar just for looks.

Happy hunting!

PS. This is just speculation on my part, but I'm guessing the reason why RAM doesn't have any venturi tip is because the DPF is actually the first thing in the exhaust path. So it lights off sooner. Then you have the SCR/Catalyst section afterward. I think that the exhaust gases have just enough opportunity to cool before exiting with that exhaust setup rendering the venturi tip unnecessary. I believe Ford has their DPF closer to the end of the exhaust system and GM may also be the same (unsure on GM actually, any experts that can chime in?).

[ScottG]

I don't think you can add it to your new truck. When it goes through a regen it will burn it out.
Also, you don't need it as no soot comes out that pipe. In fact the inside will stay clean.

[GoPackGo]

You will not have a soot problem with the new truck (I have a Ford but I'm sure you will have the same experience). These new ones are amazing. No smell. No black smoke. Just nothing. If that's the reason you want to change out the exhaust, then don't waste your money.

The reason Ford warns you about plugging those holes near the exhaust tip is because they suck in outside air to cool the exhaust coming through and out the tips during the regen process. It's super hot. I had to shut mine down the other day part way thru a regen which kicked in while I was running errands around town. I walked back to see just how hot the tailpipe was and was shocked that I could feel blistering temps when I put my hand close to the tip. Touching it would have meant a nice big blister. The holes have nothing to do with back pressure, which they have no effect on.

[Tlauden]

Straight pipe that thing, THEN add the turn down!!!!

J/k j/k

Nah, stock pipe should not blow any smoke with that dpf thingy in there!!

[Sport45]

The 2015 shouldn't be pumping out enough soot to stain anything. I'd leave it alone.

[Turtle_n_Peeps]

Your old truck did not have a DPF on it. Your new truck does. The inside of your pipe will look like new for 10's of thousands of miles if not 100's of thousands of miles.

BTW turbo's do not like backpressure of any kind. 🙂

[agesilaus]

Those exhaust pipes are tuned to a certain back pressure. Whacking a chunk off and adding a 90 degree turn would certainly change that. Ford even warns you not to let the small holes at the end to get plugged.