10 years since SCR technology on trucks

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by Oldironfan, Oct 15, 2018.

  1. Rideandrepair

    Rideandrepair Road Train Member

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    All the newer engines have a lower rpm max torque range from what I’ve read about them. I’m surprised the Transmissions aren’t going out more often.I never thought it affected the rears much but I guess technically they too if hit with higher torque are put under more stress. I’d rather ikeep my old Detroit wound up- have to anyway to get up hills due to low Max torque rating.Only thing I miss about old 425 Cat it would pull a hill better than either of my 12.7 500 hp.
     
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  3. Oldironfan

    Oldironfan Road Train Member

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    I see no statement on how the new magic engines will last more than 3 years or until warranty is up, running low rpm while loaded.

    Or does everyone just plan on 3 year replacement now days.
    Once again being in debt for eternity.
     
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  4. Oldironfan

    Oldironfan Road Train Member

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    Low rpm torque= more friction= more vibration to entire drivetrain.
    Which is a bad thing for u joints, and diffs, and shafts.
     
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  5. Rideandrepair

    Rideandrepair Road Train Member

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    I’m sure they do!!! The Video I described was intended to encourage Lugging. Seems newer technology has taken it even farther. I don’t know enough about the newer engines to really compare any of them. It seems though they’re building on same Run Slow priciple.Question is at what cost to driveline
     
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  6. Oldironfan

    Oldironfan Road Train Member

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    Modern engines do not change the laws of physics.
     
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  7. Rideandrepair

    Rideandrepair Road Train Member

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    It’s a tough sell as far as I’m concerned. Watched an advertisement on waterless antifreeze recently, sounds like a great thing until the end of video describing the changes to fan settings as Engine runs hotter since nothing can dissapate like water etc. Even ends with an endorsement from Kevin whatshisname praising the benefits of improved mpg due to higher operating temps. It’s Hilarious
     
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  8. arrogant steve

    arrogant steve Medium Load Member

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    I love how drivers are comparing E model Cats and other older engines to new ones. These are completely different animals. These newer engines are definitely going longer than three years, the clown suggesting otherwise is just hilarious!
    It's like taking someone from the 1970's and showing them modern tv's or computers, they just can't understand.
    Just like a modern GM LS motor puts out crazy hp and torque #'s compared to old school GM smallblocks. This degree of engineering is far more advanced. Yes, technology is playing a part here.
    I've got a 17' DD15 with 593,000 miles and one failure. Yes it did leave us on the shoulder of I 40 due to a def sensure failure, but that was to blame on dpf cleaning and not replacement as advised by Daimler.
    This engine achieves peak torque at 1000 rpms and it stays in the 1000- 1250 rpm range. This engine has done a total of two parked regens, and both surprised the heck out of me.
    As I've stated in other posts, do not idle these engines, they really don't like it.
     
  9. arrogant steve

    arrogant steve Medium Load Member

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  10. Oldironfan

    Oldironfan Road Train Member

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    Completely different animals my eye!
    The only difference in general is the ecm, and sensors.
    You should be a Freightliner salesman.
     
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  11. Rideandrepair

    Rideandrepair Road Train Member

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    There’s a good video on Utube about turbo seal failures due to carbon described by Bruce ? Pittsburgh Diesel
     
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