DPF filter install on pre emissions Detroit engine

One of the problems with doing this conversion is that aftertreatment systems typically require a leaner burning engine.. with diesel, you have some flexibility in your stochiometric ratio, so running it a little lean doesn't hurt anything... a pre-emissions Detroit is going to be pretty pinpoint accurate with that ratio, though, and it's going to be rough on an aftertreatment system.

 

Let me put in my .02 cause im going thru this at the moment. Im schedule to have my installed in April. The shop is back up for these installs. My quote was $17, 600 for the R40 and left a deposit of $5,000 already. The R50 is another $1,200 if I go that route, but the certified shop said no need that the R40 will work fine. This is for a CAT. From all the the things of heard from the last few years, CAT's seem to be the only engines holding up with the retrofit. Detroit being the worst, loosing turbos and dropping valves. Cummins have not heard much about. The main thing you should look into a shop besides being a "Carb approved Certified shop" is being a "Reputable" installer, which a very few and I mean few. Do your homework before spending that kind of money and lastly, the retro is only good until 2020. By then the 2010 trucks will more reasonable to purchase then today. Can you say "SUPPLY AND DEMAND". And before I get all the negative replies, this works for me since I only might run 200 miles if im lucky in a day. Skateboarding is the only way to roll.

 

Best of luck with that Dave ....

 

The DPF unit I read about and saw installed didnt add any of that. I think it was designed to passively regenerate rather than actively.

Nitrogen oxide burns the soot off the DPF at lower temperatures so maybe a pre EGR engine might fare better with their higher levels of NOX.

 

I was looking at putting it on an ISM Cummins, and I was told that on a Passive system, the harder you are working the motor the better it would be, idling and cruising down the interstate would cause more issues than working it?

 

might want to wait and see how the legal ruling is April: http://www.orovillemr.com//general-...nty-judge-to-make-diesel-filter-determination

 

Copied from that article,


She said after the hearing that it was evident from Twede’s questions that he had studied the material intensely.
“He focused on the balancing of equities and was looking at the urgency demonstrated by both sides,” she said after the half-hour with the two attorneys before a packed courtroom.

Cannata said she believed she had demonstrated the need for urgency, stressing repeatedly the required filters have proven to be dangerous and have led to fires in trucks.
After the hearing, California Deputy Attorney General Russell Hildreth, representing CARB, declined to comment about the case until the judge’s decision is made in April.
During arguments, Hildreth made the point new trucks around the country are equipped with these same filters that California is requiring, without any issues. He said a suspension in California would violate federal law.




Not sure I can agree with that last sentence, aren't they talking about two different things, a factory installed DPF on a motor and cooling system built for it, is far different from an add on Passive system installed on an older truck that was never intended to use one, these are two different issues.

Or am I off base here? As far as the comment that new trucks have them without ANY issues is stretching things just a bit, isn't it?

 

You're not off base. Well, aside from expecting appointed cronies to regulate with reason and accountability...

 

Didn't they have trouble with trucks catching fire from those filters being retrofitted?

I might be imagining that but I seem to remember reading that somewhere.