In the event that you've been coping with constant DEF head aches, a cummins b6. seven scr delete has possibly crossed your brain more often than once. It's the common conversation within shops and community forums because, let's end up being honest, the emissions equipment on contemporary diesel engines may be a true nightmare when it starts acting upward. The B6. 7 is an total workhorse of a good engine—you'll find it in from Memory 2500 and 3500 pickups to college buses and medium-duty delivery trucks—but that reliability often gets overshadowed with a "See Dealer" light on the dash along with a countdown to limp mode.
Usually, the frustration starts small. Maybe it's a wonky sensor or a "service exhaust system" information that pops upward and then goes away. But eventually, this turns into a cycle of buying expensive Diesel Exhaust Fluid (DEF), working with clogged filter systems, and worrying if the truck is going to de-rate whilst you're in the middle of the job. That's the reason why so many proprietors start looking into deleting the Selective Catalytic Reduction (SCR) program altogether.
Why People Consider Deleting the SCR
The main reason anyone appears into a cummins b6. 7 scr delete is definitely simple: reliability. Once you rely on your truck for function, every hour it spends in the particular shop is money out of your pocket. The SCR system is complex. This involves a tank for the DEF, a pump, an injector that sprays the fluid to the exhaust stream, and also a catalyst where the chemical reaction happens. In case any single part of that string fails—whether it's the frozen line within the winter or a crystallized injector—the computer kicks the particular truck into a decreased power mode.
It's incredibly annoying to have a perfectly healthy motor that refuses to pull a movie trailer because a sensor thinks the urea mix is slightly off. By getting rid of these components, you're essentially stripping aside the most typical points of failing on the contemporary B6. 7 system. You're left with a "dumb" exhaust that will just lets the particular engine breathe, that is how these motors were originally made to run before the regulations got so tight.
Another big factor is definitely the cost of upkeep. DEF isn't free of charge, and over the 100 thousand miles, individuals jugs or pump visits add together. Then there's the weight. The particular SCR brick, the particular DPF (Diesel Particulate Filter), and all the associated hardware weigh a significant amount. Shedding that fat and reducing the backpressure on the particular turbo could make the truck feel the whole lot more responsive.
What Actually Happens Throughout the Process?
Whenever we talk regarding a cummins b6. 7 scr delete , it's rarely simply one thing. It's usually part of a "full delete" which includes the DPF and sometimes the EGR (Exhaust Gas Recirculation) system as well. The process generally falls into two main categories: the particular hardware and the particular software.
Upon the hardware side, you're looking at eliminating the restrictive areas of the wear out pipe. You change those bulky filter systems and catalysts with a "race pipe" or a full straight-pipe exhaust. This is the particular part that actually lets the engine exhale freely. Some men go with a 4-inch or 5-inch pipe depending on how much noise they will want and what they're trying to achieve with their construct.
The software side, or maybe the "tune, " is actually the most critical part. If you simply take the equipment off, the truck's ECU (Electronic Handle Unit) will freak out. It will certainly note that the detectors are missing or reporting "out associated with range" data and immediately put the particular truck into limp mode. A proper tune reprograms the ECU to ignore individuals sensors and stop the injection of DEF. It essentially tells the computer, "Hey, don't worry regarding the SCR system; it's not generally there anymore. " This particular is where you can even pick up some extra horsepower and torque if you would like it, though lots of people just stick with the "stock power" delete tune for the sake of longevity.
The Actual Benefits
When the cummins b6. 7 scr delete is finished, the particular first thing many drivers notice may be the fuel economy. It's not uncommon in order to see a noticable difference of 2 to four miles per gallon. Why? Because the engine isn't combating against a literal plug in the particular exhaust pipe any longer. Furthermore, the pickup truck doesn't have to proceed through "regen" cycles, where it pumping systems extra fuel in to the exhaust simply to burn away from soot. That's squandered fuel that's right now staying in your tank.
Then there's the throttle reaction. Without that huge amount of backpressure, the turbo may spoil up much faster. The truck seems "snappier. " It doesn't necessarily indicate you're racing people at stoplights, but when you're blending onto a road with a heavy load, you may feel the distinction.
Long-term engine health is another biggie. While the SCR sits further back in the exhaust, it's generally deleted alongside the EGR. The EGR system cycles unclean exhaust soot back into your intake. As time passes, that "soot-cake" builds up in your intake manifold and can even contaminate your oil. Deleting the entire emissions suite means your engine is just breathing clean, clean air, which typically results in cleaner oil and a longer-lasting engine.
The Risks You Can't Ignore
Now, I'd be doing you the disservice merely didn't mention the disadvantages, because they are usually pretty significant. Very first and foremost may be the legal side of things. In many locations, tampering with emissions equipment is a large no-no. Depending on where you live, you may run into difficulties with annual inspections. If your state does the visual check or plugs into the OBDII port to check for exhausts readiness monitors, a deleted truck may fail all the time.
Then there's the warranty. If you've got a newer pickup truck with a remaining factory warranty, a cummins b6. 7 scr delete will void it faster than anything else. If your transmission goes out or a person have an electrical issue, the seller might try in order to blame the track or the lack associated with emissions gear to get out associated with spending money on the fix. It's a "pay to play" scenario. You have to be okay with being your very own warranty department.
Resale value is usually another tricky a single. While some buyers within the used market specifically look for deleted trucks due to the fact they want the reliability, many dealerships won't take all of them as trade-ins since they can't legitimately sell them. A person might find yourself having to sell the truck privately, or keeping all your own old stock components in the garage area just in case you need to place it back in order to stock 1 day.
Making the ultimate Contact
Deciding to go through with a cummins b6. seven scr delete is really a personal choice that depends on how you occurs truck. In case you're idling a lot, doing short trips, or using the truck as being a heavy-duty workhorse, the particular emissions system is likely to give you trouble eventually. That's just the character of the animal. For all those folks, the particular peace of mind knowing the particular truck won't depart them stranded is usually often worth the legal and warranty risks.
However, if your pickup truck is running great and you're nevertheless under warranty, this might seem sensible to leave it on your own until the issues actually start. A few guys get two hundred, 000 miles from their factory exhausts gear without a single hiccup. It's all about the good luck from the draw plus how you sustain it.
In the event that you do choose to pull the particular trigger, don't go cheap. Buy high-quality tuning from a reputable source create certain the hardware fits right. A negative melody can cause even more problems than the particular SCR system actually did, including higher EGTs (Exhaust Gasoline Temperatures) that may melt pistons if you aren't cautious. Do your research, talk to additional owners, and make sure you're ready for the trade-offs. It's your pickup truck, after all—you're the one who has to live with it every day.