Scintilla GT3 Parts 2.1

I direct matched the lap times of 1.9 car to the Porsche GT3 R from the Nürburgring 24h BoP. Changed wheels, tires, weight, downforce, power... etc. etc. . Now it laps withing a couple of tenths on the Nürburgring 24h Combined Circuit while still being specs-wise in line with other GT3 cars.

Not possible with 2.0 sadly. : *

 

Well if you had to modify it that shows it wasn't good, and your setup doesn't even have windows...

 

"Well if you had to modify it that shows it wasn't good" ???

It does have windows, they're just not visible.

 

the 1.9 version, cause that would've meant it had too much drag.
Anyways, how are you measuring the downforce balance ? With the weight distribution app ?

 

The best way I’ve found to measure downforce is to use the wind app and two weight pads, with the front wheels on one and the rear wheels on the other. Set the wind at whatever speed to measure and subtract the differences between no wind and whatever wind speed you’re at. Typically (depending on the vehicle) the brakes are enough to hold it in place.

 

Ultimately it does the same thing as the weight distribution ui app. In the vehicle editor, there is an app for aero debug that shows the downforce values in Ns. Here it is for the agressive setup:

 

Are you talking about the default setup? I was referring to the tunability of the car in general, how it isn't possible to match it 1:1 with real life anymore.

Anyway, I'm using the aero debug mode for measuring downforce.

 

What tune did you use to get the 36% ? The agressive setup is the more "realistic" one here. As for tunability, the idea is for it to match real life from the get-go so it shouldn't need to be tuned to do so. I'll adjust the front downforce if needed, but i'm not sure i'll make it adjustable as it wouldn't be that realistic.

 

With max rear downforce

 

Why ? Of course it makes the aero balance rear biased

 

What? Seriously? You don't run downforce just to have a nice aero balance. You run downforce to get more grip. Actual GT3 cars can adjust their aerobalance regardless of wing angle. They do it with rake. Now, beamNG doesn't properly simulate rake, so an adjustable front wing is needed for adjusting the aero balance.

+ Even with max downforce, it's not on par with the levels real cars produce.

 

What are your sources for the amount real life cars produce ? All i've seen on google was some quora threads or stuff like that. The downforce amount was made to have realistic amount of lateral g-forces with the tires (these i'm sure are fairly realistic even though they might be a bit thin at the front). Now the rake simulation is a valid point, so i'll add adjustable front downforce at least to finetune it for now.

 

I gave the car similar weight and power to real GT3 cars ~1310 kg ~505 PS then I ran laps around Nürburgring 24h. Adding / Removing downforce until the car had the same lap time and the same top speed and the same cornering characteristics.

This is BoP sheet from 2023 for example. It doesn't have to be 1:1 with any particular car but i aim to have it inline with the mid engine ones:

1. https://24h-information.de/formulare/5566/BoP_24h_Rev0_08.05.2023.pdf
2. (edit: this sheet has the power figures as well) https://24h-information.de/formulare/114/BoP_ADAC_Qualifiers_Rev0_18.04.2023.pdf

The final downforce value was ~900 kgs @ 230 km/h. For a high downforce track such as Nürburgring.

This coincided with Ferrari's press release numbers for the 488 GT Modificata (Essentially a 488 GT3 Evo) Where they stated a maximum of 1000 kgs @ 230 km/h.

1. https://www.ferrari.com/en-EN/competizioni-gt/488-gt-modificata

In ACC, you usually run max downforce on for qualifying on the Nürburgring GP, but for the combined circuit it would make sense to remove 100 kgs because of the long straight.

The lap I compared my lap to, is this lap:

Kinda related: A comparison video I made a while ago with a 100% vanilla "race" scintilla. In case you want to see if my driving is a factor.

(edit 2) I finally made a comparison video of my version of GT3:

In 1.9 terms:

The car should have a front downforce coefficient ranging from 0-150 (Used 120 for Nürburgring)

And a rear downforce coefficient ranging from 0-200 (Used 150 for Nürburgring)

(This is assuming running the PR02 Rear 20x11 - Front 19x9. Since the scintilla doesn't play nice with other wheels & tires sizes that aren't 11" rear and 9" front)

 

Exchy updated Scintilla GT3 Racing Parts with a new update entry:

Hotfix 2

Read the rest of this update entry...

 

Nordschleife preset test (ESC off, brake force adjustment only)

 

Anything above 80% brake force exceeds the braking potential that a GT3 car should have changing the brake bias is fine but 80% force multiplier is where it should be

 

Brake bias tested at 71%

 

Yeah thats fine the baseline presets are around 60-65% brake bias to allow for trailbraking without understeering under braking b

 

Hypothetically, the developers may have adjusted the performance based on the wrong preset.

If you adjust the car as shown in this image, you can see the current basic characteristics of this car. Overall, the car becomes much easier to drive, but extreme understeer occurs in mid-speed corners such as Eaurouge. The cause is all in the front.

First of all, it is a good idea to unify the front and rear tire sizes and then try to fine-tune them. Why do drag race cars have narrow front tires? Therein lies the answer.

 

Are you using the safe or aggressive preset?. The aggressive has 0 issues through eau rouge with the correct line as you have to do in ACC in order to not break track limits