Well I know America has not burned down yet from all the regen cyles catching things on fire. Since I hope we're past the point of speculation and there are a few owners out there with some experience on this I have a couple of questions.

Has anyone had regen cycles out in grassy fields or hay fields? Does it discolor the grass any? Also how hot does it really get? I wondered about this yesterday as I backed my gooseneck in and went to disconnect it while my truck was running. Since the truck was at an angle I was right next to the tail pipe when I lowered the foot on the jack. I understand I would have to turn the truck off to lower the jack during regen but will the temperature affect the paint on the trailer if I'm backed in the wrong way and it goes into regen?

 

Funny you mention that. I have a giant Ficus hedge that runs along one side of my business property. I parked my truck next to the hedge with it running. It went into regen @ idle. There's now a 2ft dia. crispy brown dead spot in the hedges where the tailpipes were aimed at!

 

I think it would have made sense to have the regen process only active while the vehicle is in motion.

 

I've got about 500 miles on my new 6.4 and I haven't noticed it going into regen mode. I'm pretty sure it has regened by now. Is it almost unnoticable when it regens?

 

My truck exhaust gets VERY HOT during regen. I would make sure your tail pipe is not next to anything that can melt or catch fire by subjecting it to intense heat. I would describe this heat to the same as or hotter than a heat gun ( the kind you would use on heat shrink plastic tubing or to remove stickers.

 

At about 1200 miles is when I noticed the first regen, I took off from a stoplight and it felt like it lost all of its power. I pulled over thinking something was wrong and noticed that the RPMs were at about 1100 so then realized it was in regen mode, let it sit for about 5 minutes and then took off. That was my only time so far that it has been in regen but there is no question about it, you will notice it.

Leon

 

Welcome to FTE Leonandlisa, enjoy your stay here at FTE
Regen gives a new name to Watch Where You Point That Thing

 

From my experience the heat coming out is like holding you hand next to a 1500 watt hair gun. If mine goes into regen when I park it, I just turn it off and it will go into a regen at a later date when it is back up to operating temp. Noticed a slight stumble then it felt like it had a little more power, did not have to push down on the accelerator as much. While towing over 1600 miles never felt it go into regen. It probably ran hot enough for the particles not to accumulate. Did I say how well it can tow? Fantastic!

 

So none of the 08 owners here live in the country and have driven their truck through a pasture when the truck decided to regen?

 

Not so far but I can do better than that. I drive mine into NYC everyday and cant wait to watch the look on peoples faces as I slowly drive thru the masses of people waiting to cross at the intersections. Seriously it is hot enough to ignite dry hay so watch yourself. I would keep an extinguisher in the bed if you have to do this .A powerful heat gun is probably the best description for what happens.

 

If you drive in NYC then you could probably help with my second question. If I have the truck parked at an angle with a gooseneck trailer will the regen exhaust affect the paint any? If you could arrange a regen at a stop light next to a parked car, maybe you could shift into nuetral and see if you blister any paint. If nothing else, maybe you could melt the sign on someones door or something.

 

I have noticed that the exhaust does get considerably hotter when in regen. I can tell by all the popping going on under the truck when I park it in the garage and turn it off.

 

Next time mine goes into regen, I'll borow my wifes oven thermometer and get a temp. I would estimate not more than a 180*. I do not think it is hot enough to set hay on fire or blister paint. This is still something that is to be learned.

 

The dpf requires a minimum of 550C (1022F) to oxidize soot. The actual temp from the tailpipe is less than that due to the length of pipe between the outlet of the dpf and the tailpipe outlet. And the diffusor at the end is there to cool it down also, but I will bet a paycheck it is way hotter than 180F.

We set the sprinkler system off in our dyno while performing a stationary regen. It takes some heat to do that. Even with diffusors, our outlet temp during active regen is 480F.

 

That is really shocking, that is hard to imagine outlet temp 480F? A solder is a fusible metal alloy, with a melting point or melting range of 180-190°C (360-370 °F), Sure like to hear some more input on those outlet temps.