WOW! CTD Exhaust can scorch grass!

Bedlam wrote:
Search on Cummins flamethrower kit to see idiocy behind the wheel. As for hot regeneration cycles, Ford is not the only one and each company tries to mitigate the heat using different methods.

If you have not seen it there is a video on youtube of a Ford with the "flame thrower exhaust" literally with fire shooting out of the tail pipe.

Fish did not comment as I assume he knew exactly what I was talking about. :B

jus2shy wrote:
Yep, I think it's a common warning for all post 2007 diesels to beware of driving over dry vegetation. Fish did bring up a good point that I was always curious about, why the Cummins powered trucks never required any sort of louver or vent in the exhaust system. Chevy and Ford always had louvers, even on the new 2.8L duramax it has the louvered exhaust. But I don't think RAM's ecodiesel has any venting on it as well. I wonder if it's the order of the catalysts on the RAM trucks, GM and Ford both go SCR->DPF, while RAM is the opposite. Maybe the temps are cool enough to be acceptable at the tailpipe after going through the SCR catalyst (though still hot).

But that does not explain pre scr vehicles. So maybe Ram can burn off the soot at a lower temp or there is some other reason.

Yep, I think it's a common warning for all post 2007 diesels to beware of driving over dry vegetation. Fish did bring up a good point that I was always curious about, why the Cummins powered trucks never required any sort of louver or vent in the exhaust system. Chevy and Ford always had louvers, even on the new 2.8L duramax it has the louvered exhaust. But I don't think RAM's ecodiesel has any venting on it as well. I wonder if it's the order of the catalysts on the RAM trucks, GM and Ford both go SCR->DPF, while RAM is the opposite. Maybe the temps are cool enough to be acceptable at the tailpipe after going through the SCR catalyst (though still hot).

They do get very hot during regen. The owners manual does warn about parking over flammable stuff like grass, etc. I was a little freaked out the first time my current truck (first modern diesel I owned) went into regen not experiencing that before. I'm pretty sure I could roast a hotdog over the exhaust. ;)

Dan

snowpeke wrote:
What is CTD?

Cummins Turbo Diesel.

What is CTD?

GordonThree wrote:
Idle for a quarter hour, why?

Automatic shutdown should be mandatory on all vehicles just not commerical delivery trucks.

Good effing grief. I let my truck idle a lot longer than that last weekend because my 4 year old crashed in her car seat at naptime on the drive back to our camper and it was 100 degrees out. What in the world is wrong with burning a little diesel to keep my truck cool in a scenario like that?

Search on Cummins flamethrower kit to see idiocy behind the wheel. As for hot regeneration cycles, Ford is not the only one and each company tries to mitigate the heat using different methods.

FishOnOne wrote:
Most likely in regen. It's really odd that ram doesn't have the fresh air inlets to cool the outgoing exhaust.

You mean the "flame thrower" exhaust?

Maybe someone can post a vid please.

Many states have laws about this and will cite you if you leave a vehicle running while unattended.