Just Ordered My ZR2 HD Slate Grey August 2nd
- Thread starter ZR2Cajun
- Start date
Diesel exhaust fluid (DEF) is essentially turned into ammonia from exhaust heat because it is injected into the system upstream of the catalytic converter. The purpose is to treat nitrogen oxide NOx in the exhaust to clean up emissions.
The diesel particulated filter (DPF) is is upstream of the DEF injection and captures unburned fuel from overfeeding (black particles or soot) that pukes out when you get on the pedal. The DPF is a series of meshe screens and essentially traps particles. Once every 400 to 800 miles the soot is burned off when a 9th injector dumps fuel into it and raises exhaust temp unto 1100 degrees for 30+minutes depending upon how many grams of soot accumulate.
Like scuba said if your idling or putting around or short tripping, your gonna get a lot of regens because exhaust isn't hot enough to burn unspent fuel. My previous Duramax would average about 400 to 650 miles between regens. I recorded almost all of mine in an app so I knew if the system was performing correctly. I would see 400 running around town 600+ towing or running hard. Some people could get 700-800, but I only seen 700 one time. 1 gallon of DEF is good for 800 to 1000.miles depending upon regen interval. During te regen you get a soft pedal and you mpg goes down. Very noticeable when. You regen during a tow.
Only good thing about the DPF is that it keeps the side of my boat and camper from getting sooted up and that shit is hard to clean from gel coat and trim.
There's some good articles and drawings showing the Duramax system. It adapted from the power industry using that technology for 50 years to clean up emissions.
The diesel particulated filter (DPF) is is upstream of the DEF injection and captures unburned fuel from overfeeding (black particles or soot) that pukes out when you get on the pedal. The DPF is a series of meshe screens and essentially traps particles. Once every 400 to 800 miles the soot is burned off when a 9th injector dumps fuel into it and raises exhaust temp unto 1100 degrees for 30+minutes depending upon how many grams of soot accumulate.
Like scuba said if your idling or putting around or short tripping, your gonna get a lot of regens because exhaust isn't hot enough to burn unspent fuel. My previous Duramax would average about 400 to 650 miles between regens. I recorded almost all of mine in an app so I knew if the system was performing correctly. I would see 400 running around town 600+ towing or running hard. Some people could get 700-800, but I only seen 700 one time. 1 gallon of DEF is good for 800 to 1000.miles depending upon regen interval. During te regen you get a soft pedal and you mpg goes down. Very noticeable when. You regen during a tow.
Only good thing about the DPF is that it keeps the side of my boat and camper from getting sooted up and that shit is hard to clean from gel coat and trim.
There's some good articles and drawings showing the Duramax system. It adapted from the power industry using that technology for 50 years to clean up emissions.
scubatech
Well-known member
Good input Axe. Manufacturers have come a long way in improving these aftertreatment systems. Gale Banks has some excellent videos on this as well. He has always worked with these systems, knowing that they weren't going away. He is a Duramax specialist and does a lot of military work on this engine. A lot of people out West here deleted them years ago, only to get failed emissions tests and tickets from DOT when caught. Non of us motor heads like this BS, but it's here to stay like all this government mandated junk.
Yep, it's why a lot of tuners got clipped by EPA and fined heavily. Just seen another recently. I have to do emissions on any vehicle over 5 years old in AZ. That's why I went with Duramax Tuner, cause I can run +35-125HP without deleting, but no mpg gains.
Guys up in ND deleting and getting another 4 mpg and running longer and better.......mostly Rams. It that's over now, any rig bought in last few years is locked down unless you buy a whole new computer. Costs about $5k to delete now......maybe jail time.
scubatech
Well-known member
They are tough here on roadside inspections from DOT. We have miserable emissions here in Colorado on both gas and diesel vehicles. This is the seven county area around the metro. The western side of the state has no tests! When I lived over there 5 years ago no one really gave a crap about emissions. It was great. Not many jobs and low pay though.
The Duramax Tuner guys are really good I think. I think they work with Banks too.
scubatech
Well-known member
I forgot to mention that diesels respond well to throttle controllers like your Ultimate 9 unit. Diesels have a much slower throttle response than a gas engine. We installed one on my friends Cummins and made a lot of difference. You'll be spinning the tires easily at sea level where you are located. Fun stuff!Thanks Scuba! Can you please explain this whole "regen" thing and what i'll need to be aware of? I don't idle much at all, but I know that "regen" is a thing
- Thread starter
- #126
I am going from a 2011 LTZ Z71 2500. I also have a 2018 ZR2 Colorado with a 2.8 Duramax that I am giving to my sone so I am upgrading my farm truck and it will be my daily driver since my son will have my old daily driver.Why the big switch to the HD? You guys rather the diesel, heavier suspension for towing? Why the " jump ship" from the ZR2 1500 that's only 2yrs old? Just latest and greatest kind of thing or do you guys normally upgrade every 2 yrs? Just wondering if I'm missing something!
Silverado ZR2 Photos
Silverado ZR2 Photos
Similar threads
