Fixed Oreca 07 [brakes, engine wear]

Discussion in 'Car Modding' started by Denis Eshchenko, Jun 8, 2021.

Tags:
  1. Denis Eshchenko

    Denis Eshchenko Registered

    Joined:
    Jan 5, 2021
    Messages:
    9
    Likes Received:
    25
    Hello everyone!

    Firstly, I'm an amateur modder, and just suggest my changes. You may or may not use it. You decide for yourself. Made exclusively for testing purposes, but I will be glad if some endurance leagues take advantage of this.

    You all know about the recent race in VEC. You all know about the problem with engine wear on Oreca 07 (and not only the lmp 2 car). I have investigated and here is my opinion on the situation.

    In the previous topic, it was rightly indicated that excessive engine wear does not come from quick downshifts, but from long upshifts. According to the experience of rfactor 1 mods, engine wear began after the rpm limit. In the case of Oreca 07, this should be after 9000. As the developers said, the engine resource is 50 hours. This is really a lot, and with ordinary demotions, such a resource cannot be exhausted. Hence, it is logical to assume that wear begins much earlier. Before that, there were almost no problems, because there were red flags and engine wear was reset. I've seen problems like this in Daytona and .. possibly other tracks, but very rarely. Most often at Le Mans. Why there? Because there are many long straight lines and the engine stays at the high RPM where it starts to wears out more.

    My decision.
    I found out that through the tuning file (where the car's air packages are registered), you can also fix the physics of the car.

    I decided to make a few changes through the upgrade.ini file for Oreca 07. I took the 9000 rpm limit as a basis and limited the engine wear on it. Also removed the random wear by setting LifetimeVar to 0. Of course, I haven't been able to complete the 24h race distance yet to test it live, but the AIs I launched last night were able to drive the entire distance without breakdowns.

    Also corrected the section in LeMan aeropackage:
    HDV = [ENGINE]
    HDV = GeneralTorqueMult = 1.0
    HDV = GeneralPowerMult = 1.0

    All packages had 0.88, here 1.0. As far as I know, this could also a lot on engine wear, in addition to previous engine problems. Lap times have not changed significantly. It became slower, but about 0.5 sec in Le-Man.

    Also fixed braking problem on Oreca 07. Everyone always used 60:40 brake balance but still spin on braking. Why? I’m sure the problem is in the brake torque. It is much stronger at the back. I changed on equal torque for four wheels. Now the balance of the brakes can be changed depending on your preference. I'm using 56:44 now. Locking up rears and spinning are gone. The car is very good on braking!

    And the last thing I changed was the loss downforce in slipstream. This is not a big problem compared to the others. I changed it, because in real Le Mans, lmp2 often follow each other in wheel to wheel battles. In rfactor 2 there are problems with this, especially in braking and in high-speed corners.

    List of changes:
    Motor wear
    Brake torque
    Power and torque multiplier
    Fixed DraftLiftMult

    These changes have been applied to all air packages.

    Download link:
    https://drive.google.com/file/d/1j_gaapOy9efUz1qcJQgKWsk_iNnDGjPL/view?usp=sharing

    How installed:
    copy in directory rFactor 2/Packages and just installed how anything rfcmp mod.
    upload_2021-6-8_16-22-53.png

    You can found car in Oreca list, bottom:
    upload_2021-6-8_16-21-53.png

    It's not must conflicted with original cars or anothers skinpacks, because is a different version.
    Enjoy! :)

    P.S. In conclusion, I would like to say that hopefully this topic will give Studio-397 a reason to finally get into the physics of their cars. Of course, graphics are important, but who will drive them if their cars are broken. After all, this should be done by developers, not amateur modders.
     
  2. Filippo Caneo

    Filippo Caneo Registered

    Joined:
    Dec 27, 2016
    Messages:
    33
    Likes Received:
    1
    #removefeetfromorecapls
     
  3. Duif

    Duif Registered

    Joined:
    Apr 7, 2019
    Messages:
    29
    Likes Received:
    146
    Great! I will test it as soon as possible.
     
    Peter Vagapov likes this.
  4. Lazza

    Lazza Registered

    Joined:
    Oct 5, 2010
    Messages:
    9,480
    Likes Received:
    4,510
    As this is in car modding, and you've labelled yourself an amateur, I feel welcome to make a couple of corrections (as a fellow amateur):

    Probably a bit of both, but sure - over a very long period, a handful of aggressive downshifts probably aren't causing too much damage.

    Very mod dependent. Generally I found mods that were less strict about overrevs started the wear a bit earlier, and it grows slower. F1 mods often had very little under redline, and overrevving on downshifts would cause a lot of damage.

    The only time you're using 1s of wear each second, is when you're sitting on the damage threshold (oil) temperature and the damage threshold RPM. At all other times you're generating less or more wear, and often to a large extent. You can make an engine that will last a 24 hour race with a listed lifetime of 2000s or 200000s, depending how you set up the damage.

    Damage is determined purely by the damage parameters relating to (oil) temperature and RPM. The torque/power the engine produces, the turbo present, the fuel consumption, the heat generated per fuel consumption, all have no direct effect.


    If this car has a noticeably different working lifetime to the other cars, then fair enough. As long as it's more than someone saying "my engine broke, so something's wrong" without checking how they're running the car and in comparison to other similar cars.


    For testing engine wear, rather than run an entire 24 hours, you can set time acceleration and then mechanical failures to be time scaled. Then you can set time to, say, 24x, and an hour is roughly equivalent to running 24 hours. You do need to be a little careful about how you test it (pitstops that heat up the engine are like 24 pitstops heating up the engine, and 24 outlaps with the engine slowly cooling back down, for example), take any warmup you do into account (perhaps add a lap) and add a bit of wiggle room by making the engine consistently last 1h10min instead of the 1h exactly.

    Tip: if doing this, deliberately kill the engine quickly the first time, to confirm everything is set right. On a few occasions I got 20 mins into a 15 min test and realised I'd managed to turn mechanical failures off, or some such...

    For a car in devmode you can bring up the engine lifetime live, makes it even easier.

    *Forgot regarding the testing: test the engine in race sessions if there's any random variance set. I got a LOT less variation in race sessions compared to practice. I would assume 0 variance will cancel that; I'd probably test in a race session anyway, just to make sure.

    Also on long shifts vs downshifts - obviously downshifts can hit higher RPM, so each can have a much bigger effect on damage.
     
    Last edited: Jun 9, 2021
  5. McFlex

    McFlex Registered

    Joined:
    Feb 23, 2012
    Messages:
    861
    Likes Received:
    247
    HDV=LifetimeEngineRPM=(8900,120)
    HDV=LifetimeAvg=180000
    HDV=LifetimeVar=0

    These parameters are not in the hdv but in the engine.ini
     
    Peter Vagapov likes this.
  6. Paun Robert

    Paun Robert Registered

    Joined:
    Apr 16, 2020
    Messages:
    2
    Likes Received:
    2
    Great mod! Fixes most fundamental issues with the oreca 07 and makes it much better to drive
     
  7. Denis Eshchenko

    Denis Eshchenko Registered

    Joined:
    Jan 5, 2021
    Messages:
    9
    Likes Received:
    25
    Thx, mate!
    Glad someone tested my mod :)
     
  8. Peter Vagapov

    Peter Vagapov Registered

    Joined:
    Jan 7, 2021
    Messages:
    2
    Likes Received:
    3
    Wow, nice ;)
     
    Denis Eshchenko likes this.

Share This Page