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New Launch Mode - firmware 2.9.40

Discussion in 'Model S: Driving Dynamics' started by patp, Dec 11, 2015.

  1. NSX1992

    NSX1992 Member

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    I had my battery heated while charging at the Supercharger and after that the battery was being heated without having to drive around. Because the dragstrip was busy I had to wait one hour between runs and yes the % went down with time but not as much if you were driving around. I did not notice any slip as the track was sticky. I believe you have 4 seconds after you initiate launch to press the accelerator down and then you must release the brake within 4 seconds to launch.
     
  2. lolachampcar

    lolachampcar Well-Known Member

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    and to be perfectly clear on the sequence for those trying this out-

    .stopped with wheels perfectly straight
    .press brake with left foot hard and hold down hard
    .quickly and smoothly cycle the accelerator pedal all the way to the floor and release using your right foot (while continuing to hold the brake firmly down with your left)
    You should see launch mode enabled on your dash (not center screen)
    .press accelerator to the floor with your right foot and hold it there
    You should feel the car squeak and groan a little bit as the motors "load up" against the drive line
    .side step the brake within four seconds and the car will launch else it will timeout and disengage launch mode
     
  3. MarcG

    MarcG Active Member

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    Don't forget "enable Max Battery Power" first and foremost!
     
  4. LetsGoFast

    LetsGoFast Active Member

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    And the ambient temperature must be above some arbitrary value (37 degrees F?)
     
  5. AWDtsla

    AWDtsla Active Member

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    Yes. Seems like the standard temperature where you get a black ice warning.
     
  6. Bill D

    Bill D Member

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    I noticed there's two different time-outs while holding the brake for Launch Mode. After you first press and release the accelerator, the "Launch Mode Enabled" message comes on and stays on for 10 seconds. If you depress the accelerator the second time before the 10 seconds expire, it will stay on and the car will squat for 4 seconds. If the 10 seconds expires before you depress the accelerator the second time, you'll get the "Both Pedals Pressed" message and no launch mode.
     
  7. XxMFxX

    XxMFxX Member

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    hello guys

    just wondering did any p85d or p90d outside north america with 7.1 was able to enable launch mode?
     
  8. lolachampcar

    lolachampcar Well-Known Member

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    attachment.php
    for those interested in the data behind launch mode
     
  9. AWDtsla

    AWDtsla Active Member

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    You've hit traction control, if it wasn't obvious.
     
  10. rns-e

    rns-e Member

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    Yes
     
  11. XxMFxX

    XxMFxX Member

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    thank you

    also checked today in my car and it worked
     
  12. silverp85+

    silverp85+ Member

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    it would be a shame if this was not added to the p85+ or any p85 for that matter because they need it badly.
     
  13. joaquinsfy

    joaquinsfy Member

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    Yes.. Please....

     
  14. NSX1992

    NSX1992 Member

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    I went to the 1/4 mile dragstrip in Fontana, CA yesterday and alternated every run (8 total) between Launch mode on and off. There were no differences between the two except I get much better reaction times by just pressing the accelerator quickly. But my best time was the first run with launch mode but probably because the battery was at its highest level of charge.
     
  15. lolachampcar

    lolachampcar Well-Known Member

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    Several have done back to back multiple runs with data and it shows no difference between fast foot and Launch Mode.
     
  16. AWDtsla

    AWDtsla Active Member

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    Still waiting for someone else to repro but slip start with fast foot seems the fastest for me. You can't use slip start with launch mode.
     
  17. Dbitter1

    Dbitter1 Journeyman Member

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    Also, at the risk of sounding waaaaay too obvious, make sure your car is not in Hill Hold when you launch if you are not using launch mode.
     

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