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PHYSICS MoTeC telemetry and dedicated ACC workspace

Discussion in 'ACC Blog' started by Aristotelis, Mar 4, 2019.

  1. Forestier Mickael

    Forestier Mickael Hardcore Simmer

    Hi all,

    i'm trying to use the motec to get my setup better (Audi R8 in Silverstone with the 2 captures linked), my 1st problem would be the "Susp Histo" , i can't get the rear graph to be like @Aristotelis said in the OP , honnestly it doesn't seem to prevent me from doing a good laptime 1.57.585 with my qualification setup but racewise , it's completely different, the first 3 or 4 laps are ok, then the car becomes harder to control (whatever the track is) , so i'd like to know if the susp histo is 100% trustable. When i do changes on the rear suspensension , it doesn't change the shape of the histo (maybe i don't do enough changes...)
     

    Attached Files:

    Last edited: Sep 23, 2019
  2. seb 6th gear

    seb 6th gear Racer

    You can trust the damper histograms, they work absolutely fine.

    I don't know the R8, I've mostly driven the Lexus so far so I can't tell about actual values for the R8.

    But from your damper histogram I can tell you you are heavily underdampened on the rear, your dampers spend to much time in the high speed region most probably because your low speed settings are super low (almost no time spent between -25/25 and no peak at 0, and to weak attenuation in -100/100 vs -25/25).

    As a rule of thumb, LS settings are mainly for handling (mostly independant of the track and more linked to driving preferences), HS for grip and to adapt to track profile (e.g. sebring is one hell in termes of bumpy track and needs low HS settings)

    So when your tyres are fresh you may be able to give good laps compnsating poor handling behavior, but as tyre degrades over time as a consequence you end up with a shopping trolley.
     
    Winston and Forestier Mickael like this.
  3. McGraw

    McGraw Racer

    Thank you but I do not have the track section option?
     
  4. McGraw

    McGraw Racer

    Found it now thanks
     
  5. Brado23

    Brado23 Racer

    It's just a tab on the default base_ACC workspace that Kunos provided. Are you using that?

    EDIT: DW, I just read your next post :)
     
  6. McGraw

    McGraw Racer

    I found it but it’s not in the range group section.

    It’s nested in a tree of display options.
     
  7. Coanda

    Coanda Alien

    No you can not. Please see my response below.
     
    keith dixon and swigaffu like this.
  8. seb 6th gear

    seb 6th gear Racer

    I remember our exchange on the topic, the question I answered to, was in a different context.

    The request wasn't talking about advanced use of the damper histograms as you would like to see them, but more why is my histogram so flat does it work.

    Yes the histograms aren't perfect and lack a tad of adjustability as your remarks already explained (although I replied I wasn't too sure if it was right even if I get the logic behind)

    But yes the damper histograms works and for a vast majority of users it helps a ton to adjust dampers settings.
     
    Coanda likes this.
  9. McGraw

    McGraw Racer

    My telemetry shows me rapidly on and off the throttle under heavy braking.

    My throttle is not spiking (doesn’t happen anywhere else anyway) and I am definitely off the throttle until I stop braking.

    Happening over multiple sessions.

    R8 TC1 ABS 3

    Any ideas?

    Thanks
     
  10. Brado23

    Brado23 Racer

    I have seen that too. I assume it is automatic blipping of the throttle on downshifts programmed into the ECU
     
    Coanda likes this.
  11. McGraw

    McGraw Racer

    Of course, feel a bit silly now!

    Thanks.
     
  12. McGraw

    McGraw Racer

    How close does anyone get to their eclectic lap times?

    I am definitely improving. My best at Spa in hot lap in the R8 is 2:19.59. The rolling minimum is 19.375. Not long ago I was happy to get below 22s.

    My eclectic across all my laps in the 19s is 2:17.030.

    I feel I have a second in me but can’t imagine dipping below the 18s.
     
  13. Forestier Mickael

    Forestier Mickael Hardcore Simmer

    Hi all , i'm back with another question, thanks to @seb 6th gear , i've managed to fix my underdampened problem on the rear. But i've noticed that i've got a problem on the left side (front and rear) , the temperature is ~10/15° higher that the right side , so speaking for a quali lap it's ok because i still have a 2 laps window to do my best but in race mode , i can feel the car slide ...


    edit : track is still Silverstone and car audi r8 ;)
     

    Attached Files:

    Last edited: Sep 27, 2019
  14. Coanda

    Coanda Alien

    Will the suspension travel remain logged at low frequency? I only ask as I am trying to understand when the shock has reached the bumpstop. Has anyone been able to determine this successfully?
     
  15. Zeraxx

    Zeraxx Racer

    Unfortunately you can't at this time, if the Bump Stop Gap had actual units instead of an arbitrary value you could, but as of right now there's no way.
     
    Coanda likes this.
  16. Coanda

    Coanda Alien

    Thanks mate..

    Come on Aris give us a little more freedom. Pretty please..:D

    Even just a Y/N ind will do...
     
    Last edited: Oct 19, 2019
  17. Thomas Kühn

    Thomas Kühn Rookie

    Hello short question .. does anyone have the problem that with the new vehicles in Motec no damper analysis (damp histogram) is displayed? Can adjust what I want, it will always display the same values .. in the old cars everything works .. lg
     
  18. Coanda

    Coanda Alien

    Does anyone happen to know what frequency the suspension travel and furthermore the damper velocity are logged at in ACC?
     
  19. C#27

    C#27 Gamer

    Unfortunately only at 20 Hz, you can check the sample rates in the Channel Editor. Damper velocity is a maths channel relying on the damper travel.

    upload_2019-11-2_11-29-8.png
     
    Coanda likes this.
  20. Coanda

    Coanda Alien

    Thank you. I came across that later today. Hopefully it is upped to something more meaningful so we can perform proper damper analysis.
     
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