AUDI R8 IMSA GTO V2.0
3D MODEL BY : KUNOS & 90s (me)
UV WRAPPED BY : KUNOS & 90s (me)
SOUND BY : KUNOS Audi Sport quattro s1 e2
HANDLING & PHYSICS BY : KUNOS Audi R8 LMS 2016 ORIGINAL FROM KUNOS, edited by Monza17
SKINS BY : Hanazono Rio / Zin5ki
Description : The car made for free 100% & Inspired by Khyzyl Saleem (K.S)
parts were now scratch made like the rims and the spoiler. the rest were kunos.
Change log
V2.0
-change the 2 spoiler to the scratch made one by 90s (me) as well the rims
-handling improvment by monza17
-rims skins by Zin5ki
Link
https://mega.nz/file/9i4klYQI#LI-6c-MBCEvzScrDnmWvzmV9q5uC3ks4eOpauPxxnSY
View attachment 970069 View attachment 970068
This is an beautiful mode and is a wonderful homage to the work of Khyzyl Saleem:
https://www.artstation.com/khyzylsaleem
@K E N N E T H This is a unique model, an absolute visual pleasure and I hope to see many more in this vision. Clearly a huge amount of time and dedication has gone into this model, congratulations to everyone involved.
I noticed however that there is still an issue with the #Steer_Ratio / Rod and Lock with this vehicle.
I have therefore attached a fix for those who wish to use it (primarily wheel users) and have attached the details and evidence explaining why this is the case.
Currently the vehicle is set to have the following data in the the car.ini:
[CONTROLS]
FFMULT=1.574
STEER_ASSIST=1.000
STEER_LOCK=320 <<Real car's steer lock from center to right
STEER_RATIO=16.5 <<Steer ratio
LINEAR_STEER_ROD_RATIO=0.0031
As you can see the data states that this vehicle has a #Steer_Lock of 320 degrees which is 640 degrees lock to lock.
The real world maximum data value reported for similar vehicles of this type is 360 degrees / 720 degrees lock to lock. The data in the ini is not far from the maximum specification, however the rods delivery is inaccurate.
This is verified here by Kunos own instructions for configuring the ROD:
https://www.assettocorsa.net/forum/index.php?threads/answers-from-the-devs.12077/
By reducing the #Steer_Lock below the maximum value you are effectively removing the real the world physical rotation wheel users can apply.
It is very possible that in some cases a lock of 10:1 was used at some tracks, however this should not be reflected in the controls config.
As a reference point lets look at the Audi_R8_LMS (not the exact vehicle) and the steering locks for all vehicles in ACC:
https://www.motorsportfocus.net/uploads/2018Bulletins/Audi_R8_LMS_MY2016_Handbook_v1-2018.pdf
https://simracingsetup.com/assetto-corsa/acc-steering-lock-settings/
Lets also look at the Porsche 911 GT3 RS:
https://newsroom.porsche.com/dam/jc...9_911_GT3_RS_Technical_Specifications.pdf.PDF
As you can see Audi frequently report a maximum lock of 720 degrees (Porsche 800) with a #Steer Ratio of anywhere from 13+ to 17+ with around 20 degrees at the tire depending on the ratios.
Now lets take a closer look again at the data supplied with this wonderful model and compare it to a screen shot of the live in game telemetry to see how It compares and translates in game.
[CONTROLS]
FFMULT=1.574
STEER_ASSIST=1.000
STEER_LOCK=320 <<Real car's steer lock from center to right
STEER_RATIO=16.5 <<Steer ratio
LINEAR_STEER_ROD_RATIO=0.0031
How this translates in game:
As you can see the data is misaligned the vehicle is reporting an in game #Steer_Ratio of 10.2 (as we are left wheel to left side in this picture) with 31.5 degrees of angle at the tire all in less than 320 degrees of physical rotation?
Now lets take a look if we input the manufactures specifications:
[CONTROLS]
FFMULT=1.574
STEER_ASSIST=1.000
STEER_LOCK=360 <<Real car's steer lock from center to right
STEER_RATIO=16.5 <<Steer ratio
LINEAR_STEER_ROD_RATIO=0.00197
Now we have a #Steer_Lock of 360 degrees / 720 degrees lock to lock which is the maximum reported value advertised for this vehicle type from in ACC and the data sheet above. The ROD has been adjusted to compensate for the added rotation.
Lets see how this translates in game and in telemetry.
As you can see the car now reports an in game Steer_Ratio of 16.5 and 21 degrees the tire (as we are left wheel to left side in this picture) which is within margin of error when compared to the spec sheet ACC et al.
However as these vehicles frequently change their DOR and SR from track to track, something we are unable do in AC and I acknowledge that this is a "maximum" reported degree of rotation and was likely not used on every track, it therefore makes sense to find an average.
As the cars run between 13+:1 and 17+:1 ratios it does not seen unreasonable to use 15.5 as a reference point.
Lets input the data and adjust the ROD to compensate:
[CONTROLS]
FFMULT=1.574
STEER_ASSIST=1.000
STEER_LOCK=360 <<Real car's steer lock from center to right
STEER_RATIO=15.5 <<Steer ratio
LINEAR_STEER_ROD_RATIO=0.00190
Lets see how that translates in game and in the telemetry:
The game is now reporting a #Steer_Ratio of 15.5 (as we are left wheel to left side in this picture) with 23 degrees of angle at the tire all in 360 degrees of physical rotation. When driven on the track the car handles far more realistically and feels vastly superior on a wheel.
We have now corrected the lock/ratio and rod, found a suitable medium for wheel and controller users and provided a more accurate representation of the vehicles specifications.
Finally we address the elephant "so did Kunos get it wrong” as some of the data in this vehicle was lifted directly from base content, the answer to that is yes and no.
Kunos had to cater for many situations, including limitations with consumer grade wheel inputs (from a decade ago) many of which were not DD or 900+ DOR. They also had to consider balancing, setups, bopping, console controller users etc which was no easy task.
Kunos have openly admitted on several occasions, which I find incredibly admirable, that they have made mistakes in the past, here is one of those examples:
https://www.assettocorsa.net/forum/...or-the-devs-concerning-ffb-differences.26638/
Many internally were unaware what #Steer_Assist did and assumed it was power steering or game pad assist (and not a gamma) and were applying it to vehicles incorrectly. Kunos later clarified what #Steer_Assist was and stated that any and all affected vehicles would be updated and fixed, not all were.
While the data included with this vehicle many not be completely incorrect, and it works particularly well for controller users, what I can say is that the data in ACC and modern AC mods (including those ported from ACC) no longer align with the older data in the original base AC content, improvements have been made.
Much has changed in sim racing and as such modding has evolved, much like consumer hardware and while the data entered in some AC cars is not bad, incorrect or wrong, that’s not to say it’s completely infallible and can not be improved upon.
Thanks again for sharing this mod with the community.
The files for the fix are attached for anyone who would like to use it:
Edit:
Added a missing folder inside the "ks_audi_r8_imsa_gto_2020_v2"