[WIP] CART Factor

Discussion in 'Vehicles' started by zerocool, Dec 13, 2014.

  1. tchachalowski

    tchachalowski Registered

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    Is there a problem in Indianapolis with this car? I can't get to turn 2 without the car turning?
     
  2. DiggerHawk

    DiggerHawk Registered

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    Are you talking about the oval or road coarse? There seems to be some issues with the superspeedway configuration when I tried it. Its very unstable. Maybe something to look into sometime.

    I know what you mean about big crashes where cars just drive away from. Maybe the threshold for the wheels staying on is too high.
     
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  3. Roninho

    Roninho Registered

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    Make a big change in the setup to the weight distribution and the oversteer effect will go away.
     
  4. DiggerHawk

    DiggerHawk Registered

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    I presume the weight distribution needs to be moved forward, which is the minus button. Do you have a specific value for the Lola? I tried Indy Oval using the Superspeedway package again but I couldn't get a full throttle lap no matter what I tried in the setup. I tried the Apex 2020 Indycar's and they worked.

    I would be interested to have a look at your setups to compare with the defaults.
     
  5. Roninho

    Roninho Registered

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    Hi @DiggerHawk , it's quite easy, just move the weight distribution all the way forward with the minus button and the oversteer should go away. And i'm not sure if this is for RF2 or for AMS1, but also take a look at the tires, one of the 2 games has a difference between road and speedway/ovals for tires. I think it's AMS, but i would suggest to just check it to be sure that you don't run a RC tire on the oval.

    That's the only changes i've made to the default setup and i can run a full tank in race trim (30+ laps) in traffic and alone without any uncontrolable oversteer effect.

    The car isnt a car that you can run full throtle for the full lap in the default setup (not even close to it), while the DW 12 2014 mod or the VRC 18 car you will be much close to full throttle. i guess just different cars & era's.

    If you are racing versus ai i would also suggest to do 2 things for OVAL racing in your json file:
    * Change the AI Logic Override to 2, this is the superspeedway setting. I get the impression that the AI are much less inclined to drive into you with this setting.
    * Change the AI Fuel Multiplier (at least for indy). With default setting and the multiplier at the base setting of 0.99 i get roughly 33 laps with a full tank and the AI does between 39 and 41 (depending on their car). You have to test for yourself but i have increased the multiplier to somewhere between 1.10 and 1.20 to have them run the same nr of laps on a full tank.
     
  6. Roninho

    Roninho Registered

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    Oh in addition, i'm still learning this car, but on the RC's with no help on (TC, brake stability, etc.) i feel that the car in itself is quite driveable. You obviously have to pay attention to the throttle without TC, but that is quite doable.

    However there is one issue (for me) with this car and that is the downshifting. It's impossible to downshift quickly without getting into a spin. When i put on all help there is no issue, so i think the autoblipping option cures it, but without that on i cant get a lap done.

    Any suggestions in technique how to solve this? I never raced with cars where the downshift was such an issue. I can turn off all helps and have no issue to run a lap at Laguna with the DW12 or the VRC 18 indycar, but with the '98 CART car it's impossible to shift down aggressively.
     
  7. atomed

    atomed Member

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    Whenever I downshift I always hit the gas and get the left foot very ready to hit the clutch, this car doesn´t forgive half a mistake, and I love it.
     
  8. DiggerHawk

    DiggerHawk Registered

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    Looking at the files the rF2 version only has road tyres (soft/wet). I wonder if the AMS1 oval tyres could be added?
    Obviously in real life these cars didn't race at Indy thanks to the split so it would be hard to know for sure if they would of run flat out. As far as this mods concerned a lift and coast in to the corners is the way to go.

    As I understand it, changing the AI logic to 2 disables the "flexible superspeedway driving line". So would that keep the AI on the single racing line?
    The fuel usage is a tricky subject as for my mod I have reduced the AI fuel usage to better match the player on road courses. But you are suggesting that it should be the opposite for the ovals. Maybe a compromise is needed or maybe a different setting for each is possible.

    In terms of the gear shifts have you seen BeGee's update on page 13 of this thread? He has amongst other things switched the gear box to a sequential with auto-blip, which is how it worked in real life at this time. This change thanks to BeGee will also be included in my future updates.
     
  9. Roninho

    Roninho Registered

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    That's actually a bit funny you say that about the ai logic disabling the SS driving line.... I thought putting 2 in was a mode for ovals, but it is actually the opposite looking at the description.

    Having said that i still like it at 2 for ovals.
    The reason why i like the setting at 2 for ovals is that at least in my case it stops the AI from crashing into me all the time. For example when i pass an AI at the backstraight at Indy the AI will try to take back the position right away IN turn 3, which makes no sense. Result at a setting other then 2 is that i will have a lot of contact with AI cars.

    With the setting at 2 they try to stay in the 'one driving line' and not try to pass me back right away regardless of what their track position is, but actually set up the pass a lap later at a less risky spot.

    I then us the AI Limiter to get a setting where the AI is passing but faster drivers who should be in front (in terms of talent files) are in front.

    I will dive into BeGee's update, thnx for the heads up.
     
  10. tchachalowski

    tchachalowski Registered

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    are these tires the right compounds for oval?

    are these tires the right compounds for oval?
     
  11. PatientRF2fan

    PatientRF2fan Registered

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    I have also been looking at tires.
    It appears that both the goodyears and firestones use the same TBC file data but use different TGM
    The Goodyears use the ALT (SOFT) ISI TGM FILE
    The Firestones use the Primary(MED) ISI TGM FILE

    I setup upgrades to use the ShortOval and Speedway ISI TGMS.
    I plan to do some testing and experiment with the number on both the TGM and TBC.

    I am also looking for a general description for Short Oval and Speedway tires attributes?

    I imagine short ovals are more durable that a road tire and the speedway are harder plus maintain their shape at speeds over 200.
    Anyone else know?
     
    Last edited: Jul 4, 2021
  12. davehenrie

    davehenrie Registered

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    I would think oval tires generate heat more from longitudinal rotation than from lateral friction. Most of the CART Short ovals were flat or nearly so, that would suggest the short oval tire should be more similar to the roadcourse tire. Short flat ovals are really just a two turn road course.
     
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  13. Roninho

    Roninho Registered

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    Well driving the base setup will ensure that your right front tyre will be gone within half a tank. Not sure if that is the tyre or the base setup.

    Anybody got some rc, sc and oval setups to share?
     
  14. Roninho

    Roninho Registered

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    Hi what do you mean with "the ShortOval and Speedway ISI TGMS."?

    I've now raced a bunch of ovals (including some of @tchachalowski tracks) and i dont think the tires are right.
    I have no issue regarding grip and wear compared to ai on rc's, but on the ovals i have limited grip (on tge speedways, not the short ovals) andhuge tire wear issues (both ss as short ovals). Basicaly my tires wear within 60%-80% of the stints of the ai.
     
  15. PatientRF2fan

    PatientRF2fan Registered

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    image space incorporated ISI before studio 397 took over
    Had default open wheel tires that were used on most open wheel mods. They had a Alternative Primary Short Oval and Speedway

    Seems to be the only place to download them now.
    http://meetme.bplaced.net/rF2_onlineTools/
     
  16. Roninho

    Roninho Registered

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    Could you share those upgrades? Or explain which steps to take to use these tires. I would be interested to test those
     
  17. PatientRF2fan

    PatientRF2fan Registered

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    It involves unpacking editing lines and files then repacking. Then manipulating and testing numbers repacking every time. Give me some time and I will get back to you.
     
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  18. USCTrojan4JC

    USCTrojan4JC Registered

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    Just a quick FYI that in 1998 drivers could upshift without lifting, but still had to manually blip the throttle when downshifting.

    Here is a video from 2002 of Adrián Fernández working the pedals in his car.
     
    Last edited: Jul 14, 2021
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  19. USCTrojan4JC

    USCTrojan4JC Registered

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    I had been away from this thread for 6+ months. Just wanted to say wow and great work, @BeGee and @DiggerHawk!
     
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  20. PatientRF2fan

    PatientRF2fan Registered

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    Nice catch USCTrojan,

    https://auto.howstuffworks.com/champ-car.htm#pt6

    A Champ Car uses a six-speed sequential transmission that is more similar to a motorcycle's transmission than to a typical automobile's. Shifting is done by the driver using a small lever to the right of the steering wheel:

    Another feature of a Champ Car's engine and transmission is called Shift Without Lift, or SWOL. The engine control unit allows the transmission to shift gears without the driver lifting off the accelerator. The driver can therefore upshift without using the clutch or letting off the gas, and this maximizes acceleration. The SWOL feature is also available during downshifting, but the driver must match engine rpm with the gear choice during the downshift.
     

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