This can be a question we obtain millions of occasions each day. Since 2007 all Dodge Cummins 6.7, Ford Powerstroke 6.4, and Chevrolet Duramax 6.6 trucks range from factory outfitted having a particulate filter to satisfy harder pollutants standards. A diesel particulate filter (DPF) is really a device that traps the smoke and unburnt fuel from diesel combustion. You might have observed for those who have one the 07+ diesel pick-ups it never creates any black smoke whatsoever. The DPF will capture 90% or better of dangerous diesel pollutants. When the DPF is becoming "full" of smoke, it have to have a regrowth cycle to be able to burn all of the smoke out. You might have observed an easy in your dash every so often that alerts you the DPF is within "regen" or "cleaning filter."
Essentially what's happening throughout this method would be that the engine's computer has made the decision in the information it receives in the sensors set up in the exhaust the DPF has chock-full past it's acceptable limit. The pc then opens the EGR (exhaust recirulation valve) presenting hot exhaust in to the intake to assist get get exhaust gas temps greater as well as inserts a little shot of fuel in to the cylinders once the exhaust valves are open. The elevated exhaust temps and also the little bit of fuel then burn up the particulate (smoke) the DPF has collected becasue it is last regen. When the computer will get blood pressure measurements in the sensors within the exhaust the filter is flowing a suitable limit again, it finishes the regen cycle. The regularity of the cleaning cycle differs from vehicle to vehicle based on use, mileage, and engine condition.
Misconceptions concerning the DPF system:
1. The lines along the side of the exhaust are fuel lines that dump fuel into the filter and also the other connections are glow or spark plugs that ignite the fuel to wash the filter.
Not whatsoever. When I mentioned above, the fuel required for washing the dpf is joined in to the engine cylinders by route from the regular fuel injectors throughout the exhaust stroke from the engine. A little shot of fuel is pressed by helping cover their the relaxation from the exhaust gas. The metal lines everybody sees along the side of the DPF filter are for any pressure sensor that's usually connected to the side from the transmission or frame. They've the lengthy metal tubes in it to obtain the temperature from the exhaust they're calculating lower before it reaches the sensor. Again, I do not care exactly what the tech in the car dealership states about individuals lines, if he states they're fuel lines (that we hear constantly), he's a fool and you ought to remove your truck after that as rapidly as you possibly can. Another wires the thing is visiting the exhaust pre and post the DPF filter aren't spark or glow plugs. They're thermocouples that measure exhaust temperature. The pc uses exhaust temperature and pressure before, at, after the dpf to determine how blocked the dpf is so when you're ready to execute a regen.
2. I'm able to just take away the DPF filter and set a bit of pipe inside.
Sorry, no. Should you take away the DPF filter making no changes towards the engine's computer, it'll enter whether limp mode or perhaps a constant condition of regen. To put it simply, all of the sensors and also the dpf need to be in perfect condition when running the stock vehicle's programming otherwise your truck goes haywire and you'll not have the ability to drive it.
Common issues with the DPF system:
1. Poor Gas mileage - This is actually the number 1 complaint we obtain from clients who've trucks outfitted having a DPF. Most clients who exchanged within their pre-07 diesel pick-ups appear to have been unhappy with the possible lack of fuel mileage that accustomed to enjoy. The typical gas mileage we hear people set of the DPF outfitted trucks is generally 12-14 mpg. A number of these folks exchanged in trucks that did 18-22 mpg and therefore are completely disgusted.
2. Excessive regens - A number of our clients who use their trucks for work complain about very frequent regens that kill their fuel mileage and gratifaction. Many clients who work outdoors during the cold months were utilised to departing their old diesels run all day long when they were at work site. The DPF outfitted trucks don't handle this perfectly. The cooler idling temperature from the exhaust gas will smoke in the DPF with an faster rate. It's not uncommon of these clients to be their second or third filter change since the truck entered constant limp mode. The usually car dealership fact is: "You cannot let these new trucks idle." Which matches over pretty much with men who're stuck in a job site five miles in the forest all day long and also the temperature never will get above ten levels.
3. High alternative cost - If any one of you've needed to purchase a DPF alternative from warranty, you most likely had cardiac arrest whenever you got the balance. A alternative DPF (which is not available aftermarket yet) runs roughly 00-00 for that only the filter alone. And listens to the frightening part. DPF existence is believed between 120,000 and 150,000 miles. Should you intend on keeping the new diesel pickup for any couple of hundred 1000 miles better begin a DPF fund.
4. Limits performance modifications - Using the new diesel pick-ups, the opportunity of horsepower enhancements is tremendous. We've taken the 3 brands of pick-ups to shut to or higher 500 rear wheel horsepower and 1000 foot/pounds of torque with only intake, exhaust, and programming modifications. Never has a lot performance been so simple and inexpensive while still maintaining street manners. The only issue is anything past a little tow type tune will aggravate the particulate filter. Arriving the engine will produce more smoke that will plug the dpf sooner leading to more regens. Many clients that run one hundred horsepower program report inadequate fuel mileage and constant regens.
What you can do to increase DPF existence and limit regens?:
Since we're not permitted legally to get rid of the DPF system, we're tied to it if you wish to adhere to Federal pollutants and your truck legal. Listed here are a couple of ideas to help mileage and DPF existence:
1. Make use of the right fuel - It's absolutely crucial and essential to use ultra low sulphur fuel in almost any vehicle outfitted having a particulate filter. High levels of sulfur within the fuel will plug the DPF immediately. We obtain plenty of questions from maqui berry farmers concerning the red-colored fuel. So far as we all know you cannot buy high sulfur fuel in a commercial sense any longer. There exists a refinery roughly 10 mins in the shop that refines diesel. Both fuels are the identical, their is simply red-colored dye put into the offroad fuel. It will not hurt almost anything to run the reduced sulphur red-colored fuel. Another question we obtain requested is all about chemicals. Our recommendation would be to only run items which were designed for diesel fuel. Energy Service, K100, Standyne, and Expensive Lube for instance are brands that people see no problems running. Don't add any kind of homemade fixes. Adding a quart of saw oil, atf, or other things most likely is not advisable. It'll burn dirty and could clog the dpf.
2. Make use of the proper engine oil - Make certain you use an electric train engine oil that's ranked correctly for the truck. Some engine oil will get burnt in combustion regardless of what. If you're running oil that's not developed for any DPF outfitted vehicle, it'll smoke in the filter sooner.
3. Keep idling low - To put it simply, idling adds to dpf problems. Period. Keeping the rpm's elevated throughout can help. Keeping idling low is the best for these trucks.
4. Run it tough every now and then - You shouldn't be afraid every now and then when rising a hill to matt the throttle for any couple of seconds. Running the18 wheeler hard and becoming things nice warm can help obvious out smoke deposits.
I wish to take away the DPF. So what can I actually do and just what would be the benefits?
First factor, it's absolutely illegal to get rid of or disable any pollutants device for just about any vehicle that's likely to be operated around the public freeways. Should you decide you need to remove pollutants equipment unconditionally, it's exclusively your decision as well as your auto technician to determine what's safe and legal for the application. I don't condone nor advise getting rid of the dpf or other pollutants device. All of the good examples I talk about below were examined off-road and also the mileage tests were carried out on our Superflow chassis dyno that simulate the burden the18 wheeler has alone so when towing.
We've done some testing on the 3 brands of trucks to determine what results might be accomplished by getting rid of the dpf filter system. You will find many items readily available for off-road and competition use which will disable the dpf system. You need to run some kind of aftermarket device to disable the machine or you will see problems whenever you take away the DPF. You will find a number of options that will permit removing the DPF with no horsepower increase as well as a number of options which will equal to 250 horsepower together with getting rid of the DPF.
Listed here are the exam trucks we've done controlled tests on our chassis dyno with:
Truck #1: 2007.5 Ford F-350 6.4 Powerstroke
Mods: S&B Cold Air Intake, Edge Race Evolution, DPF Remove pipe (relaxation factory exhaust)
Stock RWHP: 285
After Mods RWHP: 471
Average Mileage stock: 11.8 mpg
Average Mileage mods: 17.4 mpg
Notes: Very fundamental remove package. Overall mileage leaped 5.6 mpg on simulated highway driving. Horsepower levels vary from 40HP increase to 185 hewlett packard increase around the EDGE Race Evolution. Stock air box would pull filter restriction gauge with clean factory filter on even 'abnormal' amounts. Air box upgrade essential with this package.
Truck #2: 2008 Dodge 3500 6.7 Cummins
Mods: Full 4" DPF and Cat remove exhaust, Flo-Professional DPF electronics package
Stock RWHP: 294
Mod RWHP: 311
Average Mileage Stock: 12.1 mpg
Average Mileage Mods: 18.9 mpg
Notes: I was really impressed with this particular package. The Flo-Professional electronics only disable the DPF system and add simply no horsepower. The disposable flowing exhaust demonstrated some horsepower gains. Mileage test was simulated highway driving having a truck weight of 8700lbs. Great mileage gain of 6.8 over stock. Affordable remove package for off-road work trucks.
Truck #3: 2008 F-550 6.4 Powerstroke
Mods: DPF remove into dual 5" exhaust, S&B Cold Air Intake, Energy Hungry Performance Gryphon programmer
Stock RWHP: 268
Mod RWHP: 447
Avg HWY Mileage Stock: 9.2 mpg
Avg HWY Mileage Mods: 17.3 mpg
Avg TOW mileage Stock: 6.4 mpg
Avg TOW mileage Mods: 14.2 mpg
Notes: This can be a package that people come up with to simulate increases possible on among the diligent trucks that tows alot. The horsepower increase was dramatic, however the mileage gains were tremendous. We simulated a truck weight of 11,500 pounds for that highway tests along with a trailer weight of 12,000 pounds for that tow test. The highway mileage tests from the mods demonstrated a 8.1 mpg gain as the towing test also demonstrated an incredible 8 mpg gain.
Truck #4: 2009 Dodge 2500 Cummins 6.7
Mods: 5" straight DPF/Cat remove exhaust, S&B Cold Air Intake, H&S XRT programmer
Avg HWY mileage stock:14.6 mpg
Avg HWY mileage mods:21.2 mpg
Notes: We simply did simulated hwy mileage tests about this truck. We simply used the XRT programmer to get rid of the DPF functions in the computer and left the horsepower stock. The XRT has horsepower increase amounts of 60, 120, 175 horsepower. It will likewise shut the egr system off too.
Truck #5: 2008 Ford F-350 6.4 Powerstroke
Mods: 4" DPF remove pipe, 5" MBRP dpf back exhaust, S&B cold air intake, Innovative Diesel custom updated SCT Livewire
Stock RWHP:289
Mod RWHP: 536
Stock MPG: 11.6 mpg
Mod MPG: 17.4 mpg
Notes: This truck was a pet! The custom tunes were a few of the smoothest shifting of the options we've attempted and also the energy was crazy. There is a 247 rear wheel horsepower increase over stock around the greatest level and also the rear wheel torque was over 1000 foot/pounds! What you know already there will be a serious stop by the mileage department, but i was surprised to determine the18 wheeler gain nearly 6 mpg at even this horsepower level.
To conclude, if you're searching for some serious horsepower for that drag strip or even the tugging track, these new common rail diesels make serious horsepower with hardly any modification when the dpf is taken care of. Also, should you only operated your truck off-road you will find some very impressive gas mileage gains available by getting rid of the dpf filter. It really is bad that people could not run the trucks on public streets using the dpf removed. We truly might have incredibly effective trucks that will get great mileage and also have wonderful street manners.
Thank you for reading through,
John Anderson
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