forest service and DPF

[captaindean]

I have been hearing around my parts anyway that the forest service is going to outlaw any truck with a DPF because of the high exhaust temp created when in regen. we will not be able to drive trucks into national forest because of the fire hazard and the DPF comming in contact with dry grasses.

just thought I would throw that out there

 

[BLandau]

I was thinking the same thing. It has been so dry in Tennessee up until the last week or so.



I wonder what it will do for emissions if you burn down the forest?!

 

[CDonaldson]

I wondered IF this would be a future problem with the DPF's.



I remember when the CATS first came out, it was the same thing, lots of fires started by them. It was not long before they added a heat shield to them, seemed to satisfy the forrest service and end the problem for the most part. There were still grass fires, but they were few and far between.



I'd guess that the fires would be a lot harder on the environment than running without emissions, probably equal to thousands of time harder on the environment.



CD

 

[Trashdawg]

With all the pollution a forest fire emits and how clean my Bluetec Cummins is it should be a fair trade.

 

[BHolm]

Like most idiotic USFS rules/proposals..... just how do you figure they will enforce such a thing? With just a couple rangers for several hundred square miles (at best), seems like just being smart about where you drive and park is better than another stupid rule. Typical government dopes

 

[betterthanstock]

The Dmax venturi tailpiece looks like it ought to be required on all DPF trucks (without stacks). It pulls thru lots of outside air and mixes it with the hot exhaust to cool it off.

 

[SDuran]

Yeah, the venturis cool the gasses but not the dpf.

 

[Boondocker]

DPF stacks

Maybe Big Brother will mandate that all trucks with DPF will have to run stacks :-laf

 

[SDuran]

talk about blazing the trail!!, 1200 egt sideways or upwards = fire

 

[KCloward]

I personally like that Dodge/Cummins has actually kept a normal looking exhaust tip without the venturis in them. . unless they are back farther.



Bryce

 

[2Rowdy]

Thar chevy thing looks something I came up with in my garage.

 

[MRosinski]

Most people are clueless to what dpf's, regens, and the new emmisions are. With little to no enforcement and people not knowing whats under their trucks there gonna be some fires

 

[captaindean]

Ya make you think that having some sort of idiot light that tells you that you are in regen mode would help alot I was sighting in my rifle the other day driving over some pretty dry grass looking behind me hoping there was no trail of fire coming up behind me. ELK hunting has started here:-laf. thanks for all the replys

 

[John - K5AWO]

Well, guess I've been asleep somewhere. Just what is DPF ??

 

[captaindean]

Diesel Particulate filter on 6. 7L cummins

 

[TKeeler]

Ya make you think that having some sort of idiot light that tells you that you are in regen mode would help alot I was sighting in my rifle the other day driving over some pretty dry grass looking behind me hoping there was no trail of fire coming up behind me. ELK hunting has started here:-laf. thanks for all the replys

Knowing when a 'regen' is happening, going to happen or just finished would be really handy. #@$%! I would also like to know some specific logic or parameters for the basics of the Regens. For example at what mph does it even consider to start the process or is that even part of the equation... maybe it's engine load based, coolant temp based who knows? I have been able to gather and view a bit of information with the Dashhawk I put in a couple of weeks ago. There are PID's for 'Regen Filter' and 'Regen Filter Trigger'. I can watch the Regen Filter number slowly go up until it gets to the Regen Filter Trigger number, 4. 5 in this case, the truck then goes into Regen and the Regen Filter number slowly counts in reverse as long as all the logic in the process is satisfied. The last Regen only got the number down to 3. 5 and then stopped and is now going back up. I am still trying to figure out just what stops the Regen process besides the obvious. Slowing down and stopping briefly for a stop light didn't stop it this last time as when I started up again it continued, was it delayed while ideling at the stop light ... I couldn't tell.

 

[MRosinski]

I'm sure one of these days there will be a "Bluetech" indicating light on the instrument cluster:-laf

 

[captaindean]

I am pretty sure mine went into regen at idle the other day exhaust was extremly hot did not think it was supposed to go into regen when idling

o well knock on wood I have not had any problems as of yet and I am pushing 7000 mi and I am getting around 16. 7mpg if I can keep my foot out of it most of my driving is highway:-laf

 

[Bob4x4]

The Dmax venturi tailpiece looks like it ought to be required on all DPF trucks (without stacks). It pulls thru lots of outside air and mixes it with the hot exhaust to cool it off.

How much air at the typical 25mph or less on a forrest service road ? Little or none.



Bopb

 

[betterthanstock]

How much air at the typical 25mph or less on a forrest service road ? Little or none.



Bopb

It's not the speed of the truck that pulls in the air, it's the speed of the exhaust gas. It may double the volume at the outlet, so cutting temperature halfway between EGT and outside temperature. SO if your EGT after DPF is 800 deg, in 100 deg weather, a 50/50 dilution will get you down to 450. Much lower chance of a fire, especially while moving.