Unsprung weight and Active suspension | FerrariChat

Unsprung weight and Active suspension

Discussion in '360/430' started by Some Guy in the sky, May 10, 2022.

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  1. Some Guy in the sky

    Some Guy in the sky Formula Junior

    Sep 19, 2018
    347
    #1 Some Guy in the sky, May 10, 2022
    I have a hypothetical that I am hoping someone will be able to answer. If I reduce the unsprung weight by about 6 lbs for each front wheel and about 8 lbs for each rear wheel, will the active suspension freak out? Is there a +/- weight window per wheel that needs to be maintained for the suspension to perform as intended?
     
  2. Sj_engr

    Sj_engr Formula 3

    Sep 15, 2020
    1,302
    San Jose
    Full Name:
    dc
    #2 Sj_engr, May 10, 2022
    360 or 430? I would think the system would freak out if you just did some of the wheels and not all of them.
     
  3. flash32

    flash32 F1 Veteran

    Aug 22, 2008
    5,667
    Central NJ
    Full Name:
    Dominick
    #3 flash32, May 10, 2022
    I believe there would be zero difference unless size is different

    The sensors monitor changes in the different axes including pitch roll yaw

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  4. windsock

    windsock Formula 3
    Rossa Subscribed

    Nov 29, 2006
    1,069
    #4 windsock, May 11, 2022
    System is not that sophisticated it will not care
     
  5. Some Guy in the sky

    Some Guy in the sky Formula Junior

    Sep 19, 2018
    347
    #5 Some Guy in the sky, Jun 4, 2022
    I finally got the new rims and tires on. The weight savings on the back was 10 pounds per side and the front was 8 pounds per side. The car did not complain in any mode (sport on, sport off, asr) in all gears. One thing I will say is the car drives much much smoother. There are 3 roads in my area that are so bumpy I have to switch sport mode off but with these new rims and tires the bumps were very mild and its feels like the suspension system was designed for the unsprung weight that I am now currently running. .
     
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  6. mwstewart

    mwstewart F1 Rookie

    Feb 5, 2014
    2,641
    England
    Full Name:
    Mark
    #6 mwstewart, Jun 5, 2022
    The sensors measure vertical acceleration and react to it. There isn't a sophisticated model based on unsprung weight.
     
  7. Mario Andretti

    Mario Andretti Formula 3
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    Aug 9, 2020
    1,385
    Boston
    #7 Mario Andretti, Jun 6, 2022
    What car is this, what kind of rims? Pics or it never happened !
     
  8. Some Guy in the sky

    Some Guy in the sky Formula Junior

    Sep 19, 2018
    347
    #8 Some Guy in the sky, Jun 6, 2022
    360 with forged aluminum BBS rims (re1347 front and re1348 rear) and Micheline Pilot sport 4S (225/45 front 285/40 rear). Pics will take awhile since I am away from the car. So until then, it didn't happen.
     
  9. Some Guy in the sky

    Some Guy in the sky Formula Junior

    Sep 19, 2018
    347
    #9 Some Guy in the sky, Jun 6, 2022
  10. Ferrarista98

    Ferrarista98 Formula Junior
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    Jan 7, 2018
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    Jason L
    #10 Ferrarista98, Jun 6, 2022
    8 and 10 lbs a corner is a lot! What did you have on there before?


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  11. Some Guy in the sky

    Some Guy in the sky Formula Junior

    Sep 19, 2018
    347
    #11 Some Guy in the sky, Jun 7, 2022
    Stock starfish rims with stock size Michelin Pilot Sport A/S 3+
     

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