Resolved DTM 2020 - DRS slows the car

Discussion in 'Community Support' started by Lixma, Jun 24, 2021.

  1. anylogic

    anylogic New Member

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    Customer experience focuses something like speed in kmh seen in-game - not any technical values inside math model like lift and drag.

    Original statements from Audi and BMW on current car behavior in game would be very valuable.
     
  2. Alex Hodgkinson

    Alex Hodgkinson KW Studios Developer

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    No, those things are subject to setup.

    Mathematical base line values are everything, without them you're just guessing.

    Zero chance of any of the manufacturers looking back at them now.
    They've all moved on and the people involved have gone elsewhere.

    To reiterate, the series technical director outlined all performance and behaviour parameters. I simply executed what they asked.
     
  3. Pape78

    Pape78 New Member

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    If you have the correct data. Then you have to ask yourself if something is wrong with the physics engine.

    I have now linked you a video on which it is clear how quickly it went real. And you will never reach that in the game. Not even close. Unless you skip the chicane in Monza and press PTP 2 times in a row.

    The cars are definitely too fast in the corners and yet slower on the straights.
    And that is now amplified with these strange changes. Hockenheim is an exception, because in Raceroom the lateral forces don't affect the top speed like they do in real.

    We would rather not have said anything about the non-functioning DRS.
     
  4. anylogic

    anylogic New Member

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    New bid for Setup DLC: 1500 VRP
     
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  5. Alex Hodgkinson

    Alex Hodgkinson KW Studios Developer

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    OK, there comes a point where you have to let this go.

    Now is that time.
     
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  6. ravey1981

    ravey1981 Well-Known Member Beta tester

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    If you guys know these cars inside out like you claim then you would know how to set up the car, surely?
     
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  7. Alex Hodgkinson

    Alex Hodgkinson KW Studios Developer

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    Our cars are a snap shot in time, pre-2020 season, as the series organisers specified.

    Does not take into account any in-season development.

    Setup is a baseline value which the series technical director specified.

    I've already established you can massively influence corner and straight line speeds by setup.

    Now here's something I've not mentioned until now, and that's our weather conditions. Ours are fixed, with zero wind and a air density of 1.2 kg/m^3. If that air density were to change 10% a car's drag and downforce would change exactly 10%.

    Now guess what, the air density at the Spa race was around 1.08 kg/m^3, which is a 10% drop.. in drag and downforce too.

    So, there's one of the limitations to this physics engine: weather conditions are fixed.


    Now stop being pedantic and just enjoy the drive!
     
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  8. Pape78

    Pape78 New Member

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    I think I'm probably driving in the most competitive DTM 2020 league there is. And no one there is satisfied yet who has driven the new Physics.


    And yes, I know these cars very well and I can drive them fast: 2:2,0 in Spa before the ffb update.1:27.6 at Hockenheim. 5:53.1 on the Nordschleife (Leaderboard). That should be enough as an answer.
     
  9. ravey1981

    ravey1981 Well-Known Member Beta tester

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    You've all got the same car/physics so deal with it. Forget before. What you have now is what you have.
     
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  10. FormelLMS

    FormelLMS Well-Known Member

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    In my opinion, this is now the wrong way.
    Take it, as it is.
    Before the last patch, Sheldon van DER Linde says, it's all spot on. Now it drives completely different as pape78 said now numerous times and I know many people, who do so.
    Was Sheldon so wrong before?

    Ok, you can call me a DTM fan and I was very happy, that there is one simulation in this world where I can drive it in a very competitive league. I'm not that fast driver, not so good in making setups, that's true.
    But for me, without the biggest knowledge about that, these cars don't drive like they do (and I take only the speeds into account) in the last year's DTM season and this is probably a problem.
    I think, my happiness about having those cars is now over after a very competitive season with guys like pape78 in front, but there would be no new season at least for me.
    It's very strange to see the higher speeds in curves and the decreasing speed on straights.

    It's a bit hard to believe. Sorry to say. That's my opinion and my finding. I would be really happy if those findings from Pape and guys like speedo could be discussed on the same level. I think, they have valid points, reading the discussion here.
    And that should be no attack against anyone here, only kind asking if that could be.

    Sorry, on such posts I see, that this is not my native language. Hoping, you know, how it s meant.
     
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  11. Pape78

    Pape78 New Member

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    Regarding the air density:
    Then every car in every class would have to be slower on the straights and faster in the corners. The whole thing doesn't make any more sense then, because it's the final result that counts. If that's not true, I'll have to rework.

    The cars still drove well after the FFB update . Only the DRS didn't work and you had to adjust the height because of the front splitter. But they drove very dynamically. Instead of just correcting the DRS problem the whole car was totally changed. And now they drive like the kids version + the added and mentioned problems.

    The worst thing is this excessive slowing down, if it goes even slightly uphill. That's not normal, that I then have to make my car 2 cm higher to get that under control. For that you would need bumpstops again. But this simulation does not have that element. These changes make no sense without bump stops and the cars are no fun on tracks with long straights.
    In the end it's all about the fun!

    It is apparently no criticism wanted. Is then just so.
     
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  12. majuh

    majuh Well-Known Member

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    Why? Raceroom has always used the same value for the air density. The point is that the 2020 DTM race in Spa was an outlier because it was extremely hot at that weekend.
     
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  13. Pape78

    Pape78 New Member

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    At a higher temperature, however, turbos also have less power
     
  14. pederman87

    pederman87 New Member Beta tester

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    As far as i remember, air density and temperature affects N/A cars, but is almost neglectable with a turbo engine
     
  15. pixeljetstream

    pixeljetstream Well-Known Member Beta tester

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    that is a bit exaggerated statement, don't you think? when people just aren't in agreement, that doesn't mean criticism isn't wanted. You are not banned, or in any other way affected by the difference of opinions. Your criticism stands on its own, there was a conversation, different opinions were exchanged. You are not getting what you want, that is all. The existence of this forum and the devs interacting is proof enough that criticism is actually wanted, no?

    You suspected another bug, and the developer checked and disagrees, and the rest of the conversation to be a regular argument about how things should be.

    There is no ground truth in these games when it comes to the physics, we have different titles in the market using different technologies, with different interpretations of how things should work, what should/can be simulated at what fidelity. It is also influenced by what means are available to each developer. Therefore it is (despite best efforts) always an interpretation of a few individual humans in the end, and they are always constraint by many things (budget / technology / time / scope of work).
     
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  16. anylogic

    anylogic New Member

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  17. ravey1981

    ravey1981 Well-Known Member Beta tester

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  18. Alex Hodgkinson

    Alex Hodgkinson KW Studios Developer

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    If you didn't quite understand this, the point is if we make it match the downforce and drag forces 1:1 at Spa it'd be wrong elsewhere.

    In addition it would mean the default setup would be low downforce, which wouldn't be good for most users, but more importantly it'd be fudged because the air density was different at the real 2020 race compared to our version. Thus the aero coefficients would be wrong.

    Spa:
    [​IMG]

    Hockenheim:
    [​IMG]
     
  19. Joe Ore

    Joe Ore New Member

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    When will get bump stop in the game, to have more Realistik and can you make tutorial how to setup DTDM2020 to have good pace.
     
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    Last edited: Aug 1, 2021
  20. bubblejohns

    bubblejohns Active Member

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    youve missed the biggest fkn issue here...... the tracks. not only a different weather pattern, but differing grip and even the track shapes are just so wrong especially on earlier r3e tracks. its like comparing brands hatch times irl to spa, its pointless and it is what it is.
     
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