TMC is an independent, primarily volunteer organization that relies on ad revenue to cover its operating costs. Please consider whitelisting TMC on your ad blocker or making a Paypal contribution here: paypal.me/SupportTMC

P85D vs P85DL Wh/mi

Discussion in 'Model S: Driving Dynamics' started by jbcarioca, May 20, 2016.

  1. jbcarioca

    jbcarioca Active Member

    Joined:
    Feb 3, 2015
    Messages:
    1,287
    Location:
    Rio de Janeiro, Brazil and Coral Gables, FL
    I thought it might be interesting to report my experience thus far.

    I drove 21,000 miles with my P85D and had lifetime 321 Wh/mi.

    I have now driven 4,000 miles with my P85DL and have this far 323 Wh/mi.

    Overall my driving habits have not changed but:
    I most definitely did quite a few launches, just as I did prior to the upgrade.
    The major difference probably is that I do have much faster acceleration when passing on two-lane roads, and I do quite a lot of two-lane road driving. There also was about half of the driving since the upgrade with much colder temperatures than had been typical during the P85D days; nothing dramatic but temperatures of 45-50 F vs my typical >70 F. Otherwise the conditions have been pretty much apples to apples.

    Thus my conclusion thus far is that the extra performance is, as I use it, essentially free from an energy perspective. I speculate that the simpler and less resistant single smart fuse of the L is a tiny bit more efficient than are the older multiple fuses, so, assuming one does not regularly use all the extra power it might actually be slightly more efficient. with a 2 Wh/mi difference thus far I am surprised there is really no significant difference between the two.

    Have other people noticed the difference? Frankly I noticed mostly because my trip meters were reset to zero when they did the battery pack removal during the upgrade, and my Trip A had been my lifetime tracker.
     
    • Like x 1
  2. sorka

    sorka Active Member

    Joined:
    Feb 28, 2015
    Messages:
    3,238
    Location:
    Merced, CA
    I've seen no difference in wh / mile pre vs post L upgrade.
     
  3. Alketi

    Alketi Member

    Joined:
    May 3, 2016
    Messages:
    318
    Location:
    Boston, North Shore
    Can I ask a related question that I've been curious about -- is there a reason to ever turn OFF Ludicrous mode?

    On YouTube, I see people turning it ON before launching. Is that just for effect? Why wouldn't you just leave it on all the time?
     
  4. DougH

    DougH Active Member

    Joined:
    May 8, 2015
    Messages:
    1,977
    Location:
    EARTH
    When its on it's very jerky in stop and go traffic. There's lot's of low end power.
     
    • Helpful x 2
  5. Saghost

    Saghost Active Member

    Joined:
    Oct 9, 2013
    Messages:
    2,930
    Location:
    Delaware
    My experience is very limited, but I believe it changes the accelerator map a bunch - so leaving the car in sport makes it much more tractable when you don't need all that torque, easier to park or drive in traffic.
     
    • Helpful x 1
  6. P85DEE

    P85DEE Active Member

    Joined:
    Oct 10, 2015
    Messages:
    1,214
    Location:
    TMC
    #6 P85DEE, May 23, 2016
    Last edited: May 23, 2016
    I have currently found no reason to switch out of Ludicrous.

    My car stays in Ludicrous, just as it stayed in Insane when it had Insane. I like having the capability of Ludicrous immediately available at my right foot when or if I want or need it.

    Switching it on or off takes too much time.

    My own experience differs, as I've not found this to be the case at all in my own car. There is no jerkiness in stop and go traffic. It's as smooth as silk, but it is "wound up" in the sense that very minimal pedal depression gets it up to speed, and right away. So the perception of pedal position vs speed applies in my own case. Just a little pedal gets it to the speed limit.

    With regard to it being jerky in traffic, indeed in my own experience, quite the contrary. I notice no difference between driving constantly in Ludicrous on the street vs driving constantly in Insane on the street, and it makes sense, as they are both about the same up until around 30mph or thereabouts.

    As mentioned before, and my own experience is admittedly somewhat limited going into two months with Ludicrous, but having rarely driven the car in Sport, seeing no need to, even when it had Insane, I notice nothing in street manners that are worthy of note aside from the extreme acceleration and over a longer distance and period of time than before.

    But my perspective is that of one who rarely put the car in sport mode anyway, and thus my street or daily driver manners comparison is "Insane vs Ludicrous", as I hardly ever used Sport, as opposed to "Sport vs Ludicrous", or even "Sport vs Insane".
     
    • Like x 1
  7. jbcarioca

    jbcarioca Active Member

    Joined:
    Feb 3, 2015
    Messages:
    1,287
    Location:
    Rio de Janeiro, Brazil and Coral Gables, FL
    Agree completely. I sometimes and in L and sometimes S. I do notice the pedal calibration difference, but it is very smooth and easily progressive IME. All in all, if I am using autopilot I tend to stay in S, just to reduce the apparent quickness from a full stop. Even then the difference is not major; when I want Torque Now! L is my choice.:D
     
  8. George Parrott

    Joined:
    Oct 9, 2012
    Messages:
    109
    Location:
    Elk Grove, California
    No real pre-post "Ludicrous" change in my power draw of 298 watts/mile.

    And I take mine to the drag strip every couple of months.....plus many, many "demo launches."
     
  9. Naonak

    Naonak Member

    Joined:
    Dec 22, 2015
    Messages:
    178
    Location:
    Kansas
    I get better efficiency with Ludicrous mode off, so I keep it off. It saves me about 10 - 20 kWh/mi on average. It definitely changes the acceleration map - I have a lead foot, so that's probably where the savings come from.
     
  10. tstafford

    tstafford Member

    Joined:
    Jul 4, 2015
    Messages:
    790
    Location:
    Nashville, TN
    I see no noticeable difference. My watt/mile are declining over time as I have started driving the car less and less aggressively. Ever since AP came out I drive differently.
     
  11. electrish

    electrish I Sing the Body Electric

    Joined:
    Nov 8, 2014
    Messages:
    242
    Location:
    Ohio
    I also don't see much of a difference in efficiency between Insane and Ludicrous.
    In my experience, however, the Sport setting is still better if you drive through hilly terrain compared with I or L, even with Range mode on.
     

Share This Page