dangerous06
diesel tech
- Joined
- Mar 24, 2008
- Messages
- 3,564
I heard the third event was for emmissions only? Has anyone removed it? What were the results?
I heard the third event was for emmissions only? Has anyone removed it? What were the results?
Thats for the pilot removal, he was asking about the 3rd event...Post shot...
I removed it, got lower EGTs, lower smoke output, less injector noise...etc.
I have all but forgotten it ever existed!!
~Les
Once again to clarify..
The 3rd event right? Not Pilot shot?
The OP was asking about the post shot I believe..
From the base tables That Ive seen, the post is only on at certain times. It is mainly for emissions reasons from what I hear. It looks like it is only on at an idle and low boost bottom end, then at WOT from about 2600 to 3200 rpm. I did remove mine and I can see a difference in the temperature slightly. Especially idling back down and cooling off before it shuts off. I had always heard that the post shot would help spool a large turbo on the low side, but that it could have negative side effects as far as liquefying pistons on higher rpm motors especially those motors with large nozzles. I would say just bump off the microseconds of the post shot and add those microseconds to the main shot. That would give a longer cooling period between shots. At least thats how im thinking. Anyone feel free to chime in and add or correct.
My theory on this (which I haven't tested...yet) is use the post up to 2000rpm or less and cut off any duration above that. I'm fighting injector issues right now or I would have a good idea about it. With the thought of having big nozzles, I'm not sure if the post event would still even be needed honestly.
Anyone have feedback on fuel mileage after removing post injection?