DEF performance claims
Discussion in 'Questions To Truckers From The General Public' started by Eleanor Weiss, Jan 5, 2022.
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Off road equipment (construction vehicles) is yes, or soon. Not sure the requirement date.
Trains.. maybe. Smaller high speed passenger teains yes, bigger locomotives no.
Now here's the kicker. DEF is not required anywhere. What is required is Tier 4 emissions compliance. Semis and other "smaller" diesel engines use DEF as a way to meet Tier 4. Locomotives use other means to achieve Tier 4.BennysPennys and p608 Thank this. -
I'm not a mechanic. I don't even pretend to be one. I'll pass along our shop manager's thoughts on DEF instead.
Do not run with DEF below 1/2 tank as between 1/2 & 1/4 tank air can get sucked into the system and cause damage.
Like I said, I don't know.BennysPennys and Oxbow Thank this. -
Modern engines are designed with more fail points intended to increase the speed of obsolescence. -
If you can substitute SCR in place of EGR (which is starting to happen), then yes, it totally increases reliability and extends service intervals.
Imagine how much better these modern engines would be if they weren't choking on their own exhaust?Last edited: Jan 7, 2022
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I heard one person say if a driver attempts to run without DEF, the engine will "barely run."
From what has been posted here, that might be caused by sensors responding to the lack of DEF?
Eleanor WeissBennysPennys Thanks this. -
In the event you would like to know how the railroads really feel on this topic:
A Major but Little-Known Supporter of Climate Denial: Freight Railroads -
If you are on the drag strip, and you shoot nitrous into the engine, do you get a performance increase? Yep. Now inject that nitrous into the exhaust pipe. Performance increase? Of course not. But what if you buy a more expensive brand of nitrous and inject it into the exhaust pipe. Performance increase? Of course not.
Now could one brand of DEF allow your sensors and pump to last longer, thereby keeping your uptime higher? Maybe. I don't know the answer to that. If so, I guess you could say it indirectly increased performance by reducing downtime. But if that were the case, then the mega companies would all be running the same DEF, instead of using whatever is at the pump. Why do they use whatever is at the pump? Because DEF is DEF.MACK E-6, RockinChair and D.Tibbitt Thank this. -
MACK E-6 Thanks this.
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Fascinating! Thanks to all who replied!
Eleanor Weiss
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