Will you fix the incorrect top speed physics?

Discussion in 'Kazunori Yamauchi Q&A' started by YZF, May 21, 2014.

  1. YZF

    YZF

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    High powered cars are doing 30-50 km/h higher top speeds than they should (compared to reality and GT5). This is totally unrealistic!

    Are you aware of this issue and do you plan to fix it?

    Thanks

    Update with evidence, latest game version 1.15

    Mercedes Benz SL55AMG (default settings, stock)

    [​IMG]


    Ferrari Enzo (default settings, stock, except transmission*)

    [​IMG]

    *As the stock transmission was hitting rev limitter, i added longer gears (only), for both cars.

    [​IMG]




    More tests: GT5 vs GT5 tuned vs GT6:

    [​IMG]




    "640 HP Enzo in GT6 has the same top speed as 920 HP Enzo in GT5"



    More stuff:



    [​IMG]


    [​IMG]


    [​IMG]

    [​IMG]


    [​IMG]

    [​IMG]

    And some real life footage.

    Enzo



    Sl55AMG




    [​IMG]


    UPDATE WITH MORE DATA:


    Not only top speeds, but higher speed acceleration is inaccurate as well (which influences top speeds, ofcourse). Testing acceleration from 200km/h (125mph) to 300 km/h (185 mph):

    Mercedes SLS AMG

    0-100 kph: 3.8 sec -vs- 3.9 sec (real life)
    0-200 kph: 11.3 sec -vs- 11.7 sec (real life)
    0-300 kph: 28.0 sec -sv- 42.2 sec (real life)

    Lamborghini Murcielago LP 670-4 SV

    0-100 kph: 3.5 sec -vs- 3.2 sec (real life)
    0-200 kph: 10.4 sec -vs- 10.3 sec (real life)
    0-300 kph: 24.3 sec -vs- 29.7 sec (real life)


    Corvette ZR1

    0-100 kph: 3.9 sec -vs- 4.0 sec (real life)
    0-200 kph: 10.3 sec -vs- 11.5 sec (real life)
    0-300 kph: 23.8 sec -vs- 35.4 sec (real life)


    Lexus LFA

    0-100 kph: 4.0 sec -vs- 4.1 sec (real life)
    0-200 kph: 11.2 sec -vs- 12.0 sec (real life)
    0-300 kph: 26.3 sec -vs- 50.6 sec (real life)

    More info and sources on this thread:

    https://www.gtplanet.net/forum/threads/example-of-motec-data-analysis.320038/page-2#post-10251168
     
    Last edited: Jan 29, 2015
  2. PlayerONE7125

    PlayerONE7125

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    Its amazing how people care more about asking kaz personal questions or what the next dlc is than improving the physics of this game.
     
  3. YZF

    YZF

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    Indeed.

    Although I am more surprised how PD allowed this huge bug to slip through, and what were those beta testers doing??

    This is just crazy...
     
  4. moxlox

    moxlox

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    Yes, please can we have this issue fixed. Thanks.
     
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  5. YZF

    YZF

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    Today the new 1.09 patch was released with some 'physics changes'. Unfortunately the top speed issue was not fixed.

    As the guys, who voted for Camber issue, finally got the fix, maybe they could give some 'Likes' for this issue to be fixed as well? :) We need more exposure here..

    I have added some screenshots with direct comparison to the first post.
     
  6. stuff1138

    stuff1138

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    I thought I had voted for this already...I guess not...now I have
     
  7. gitslautriv

    gitslautriv

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    Woops. With so many posts now, it's easy to miss some.
     
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  8. YZF

    YZF

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    I have managed to find SL 55 AMG top speed from real life. Added to first post. You can clearly see that GT5 is within the 'acceptable range', however GT6 is way off.
     
  9. grog

    grog

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    They did note that the top speed of FR's were adjusted, are those any better? I haven't tested it myself.
     
  10. YZF

    YZF

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    Where did you see this 'note' ?
     
  11. stuff1138

    stuff1138

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    Wasn't it in the update notes? I read that too somewhere
     
  12. YZF

    YZF

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    Quote from the news post:

    Adjustments to the physics simulation model
    The physics simulation model of “Gran Turismo 6” has been updated with the following changes:

    • The dynamics of the car on surfaces with cornerstones and bumps have been improved
    • The effect of the tyre geometry has been changed (mainly for the “Camber Angle” option)
    • The handling of some rear heavy cars has been improved;

    That's all regarding the physics update...
     
  13. stuff1138

    stuff1138

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  14. YZF

    YZF

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    Those undocumented changes aren't reliable... the screenshots in the first post where added after 1.09 update, and you can see that this is way off as it was before. SL55AMG is an FR car, and it still does unrealistic 360+ with stock transmission and ~370km/h with updated transmission. So no, not fixed....unfortunately
     
  15. YZF

    YZF

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    I have dug up a post where one guy mentioned that the top speed on Suzuka is 1mph lower (which is obviously not a physics update but just his inconsistency testing the game. And as I remember he is event not using wheel (only DS3)...):

    https://www.gtplanet.net/forum/thre...ted-changes-in-op.311572/page-12#post-9783731

    And based on that, the thread author decided that top speeds (for FR) cars were fixed... which is not true

    :)
     
  16. StigBelcherStyl

    StigBelcherStyl

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    This is a serious issue as the natural real life car competitors aren't true to their real statistics
     
  17. StigBelcherStyl

    StigBelcherStyl

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    Major issue that needs reviewing
     
  18. YZF

    YZF

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    Yes, indeed. I wonder if they know it and can't fix it easily or if they don't even have a clue what's going on... ?

    (PD could say something to it's fans instead of sitting silently without any word)


    If it's a matter of physics engine, this would require certain tweaks to the numbers and pretty much it. I would guess..
     
    Last edited: Jul 16, 2014
  19. YZF

    YZF

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    Patch 1.10 1.11: not fixed.
     
    Last edited: Aug 7, 2014
  20. Le_Manuz

    Le_Manuz

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    I hate to see racing car with max down-force being faster on Monza or Spa
    tracks being known for low to medium down-force setups

    maybe every thing is linked on road and race cars
    aerodynamics seems to have an effect vertically (from top to bottom)
    but not horizontaly (from front to rear)
     
  21. Kenocar

    Kenocar

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    I forgot what my highest top speed was but it was above the 500 km/h mark.
     
  22. YZF

    YZF

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    Sounds like from some kind of arcade game, doesn't it? Not even remotely similar to reality...
     
  23. YZF

    YZF

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    Patch 1.12 - no fixes
     
  24. PlayerONE7125

    PlayerONE7125

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    I have to say this really kinda has been ruining the game for me. I still want to fire GT5 up some times instead of this. I mostly race stock cars and the cars mostly affected by this are in my favorite class to race. All the new corvettes, the mercede's, and most other 450-650hp cars are hitting well over 215 mph. Most high hp cars go much faster at higher speeds in this game than in previous GT games (more like any game) and in real life. High speed tracks like le mans or ssrx are much easier with these cars .
     
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  25. Johnnypenso

    Johnnypenso Premium

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    The answer lies in the aero modeling. Obviously the wind resistance factor isn't correct on some cars or maybe all cars. Hopefully this is looked at for GT7 because it's bordering on arcade in this aspect of the game.
     
  26. Dave_87

    Dave_87

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    Im fairly sure the last time I drove the MacLaren F1 road car it Vmax'd at about 210mph, which is a car proven to do near 240mph IRL. And the gear ratios where all wrong too. Correct me if im wrong with that though, it was quite a while ago!

    I think the game has gotten downforce mixed up with drag. Fitting a flat floor will in many cases increase downforce, but it will also SIGNIFICANTLY reduce drag, especially on a car not fitted with undertrays, yet if you fit a flat floor to a car your seemingly limited to 186mph or 300kph. But if you have no aero fitted whatsoever, your only speed limit is how much gear your car can pull, as opposed to aerodynamic drag.
     
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  27. TRLWNC7396

    TRLWNC7396

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    Flat floors DO create drag..... But, yeah, the new aero model is rather interesting. We shall see.
     
  28. Dave_87

    Dave_87

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    It varies car to car. A car without a complete undertray will benefit from a flat floor/diffuser and will decrease drag, as an open rear bumper will often act like a parachute, and all of the parts underneath the car will create turbulence. A car that has undertrays and effectively already has a flat floor but then has a diffuser fitted will more than likely create more drag. The drag that the 'flat floors' on this game create is over exaggerated though.
     
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  29. YZF

    YZF

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    Interesting? I would just say - unrealistic. That's all...

    If GT6 was just a racing game - then it may be 'ok', but as it touts as 'the real driving simulator', I think this is a serious flaw

    :)
     
  30. Lambob

    Lambob

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    the top speed physics I'd like implemented, is a 100x tighter wheel , and can't change direction like I do at 40km/hr, when travelling at near top speeds