Ok, I'll start! I don't have a truck yet, but will be getting a ZR2 CCSB Duramax, and I intend to keep the truck for as long as it will run and stay together. Maybe even a little longer.
I will have a Provent 200 in hand before my truck even arrives, and will install it as soon as I get the truck home and the engine bay is cool enough to work in.
I am very seriously considering working towards a full delete as early as I can accomplish it. As I understand it, there are various levels or stages of deleting, but would like some clarification from those who know. Below is what I think I know.
Can be done simply by unplugging the EGR valve, so it just remains closed, or by installing a "block off plate". I'm not sure, but I'm guessing the block off plate method is a true, full delete? And would also involve replumbing the EGR coolant hoses to bypass what is removed? Any method will require ECM tuning to avoid throwing codes.
My understanding is you can just delete from the downpipe back, and this will eliminate the DEF and DPF systems. Associated injection lines, sensors, and wiring can either be wrapped and tied up in place, or removed further back and capped off. You can also replace from the turbo back, but due to the modern hi-flo design of the cat, you really don't gain anything replacing the downpipe. This will all require ECM tuning to prevent codes, and ultimately the truck just shutting down.
Before doing a full delete, it is best to ensure a regeneration has just been done, or the filter status is near 0, as the tuning doesn't eliminate the system from the ECM, it just makes it think the DPF is perpetually clean, so it never commands a regen.
I'm not sure what the tune does to deal with the DEF part? The DEF system is responsive to NOx readings, correct? Is the ECM just fooled into thinking NOx readings are perfect so it never tries to activate the system, or is the system separate from the rest of the engine tuning parameters, and is just deactivated?
I have more questions, but I guess that's a start. Anxious to see how close my understanding is from what I've read so far.
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