'13-'14 DD15 Upgrade/Tuning

Discussion in 'Freightliner Forum' started by BigPerm, Dec 21, 2013.

  1. BigPerm

    BigPerm Medium Load Member

    Just curious, as I'm a company driver; With all the correct software, what can you tweak on a newer DDA-15 truck, still have some sort of emission quality...but make the driveability better?

    For instance ( and I know this is gonna get fairly technical )...I worked at a place that had all later model Macks. But... they had the laptop & all V-MAC stuff.

    I took a stock 63MPH truck, raised the cruise & top speed...BUT...changed the fuel curve in 7th, 8th, 9th, & 10th by a few %. Made it a completely new driver, w/o hurting the fuel economy.

    Be a specific as needed, I speak theory. I think this 66 MPH truck can run 70 w/o killing the mileage. It will gain mileage by the mile...slowing from 65 to 63-64MPH. Thinking running it up to the speed limiter sends a W.O.T. signal to the PCM. No?

    Thanx
     
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  3. russtrucker

    russtrucker Road Train Member

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    I'm sure you not gonna plugin Bully Dog GT to ecm. They aren't available for detroits after 2007.
     
  4. TheLittleGuy

    TheLittleGuy Medium Load Member

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    There's a couple diesel doctors in Effingham that can turn it up w/o flashing the ecm. Had one turn the speed limiter all the way up on my Coronado, only because he was cheaper than freightliner.
     
  5. russtrucker

    russtrucker Road Train Member

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    One company driver from hirschbach had 455 hp on his Cascadia, he later went to a shop and tuned it up to 490 hp.
     
  6. TheLittleGuy

    TheLittleGuy Medium Load Member

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    Is that a DD13? My DD15 was factory set at 562hp
     
  7. russtrucker

    russtrucker Road Train Member

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    It was DD15. I though dd15 max hp was 560 hp (before 2013).
     
  8. TheLittleGuy

    TheLittleGuy Medium Load Member

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    Just went to check the spec sticker on passenger visor and you're right. Says 560hp, 1800tq.
    That's interesting because when I had it in at the diesel doctor, he pulled the 562hp, 1850tq #s off the ecm. I saw it with my own eyes and remembered it because 562 seemed like a weird #. I'd always saw HP #s within increments of 25.
     
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